CN212838558U

CN212838558U - Pump device

Info

Publication number: CN212838558U
Application number: CN202021426328.7U
Authority: CN
Inventors: 山本岳; 矢泽岳彦
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-03-30
Anticipated expiration: 2030-07-20

Abstract

A pump device is provided to contribute to improvement in pump efficiency. The pump device of the present invention comprises an impeller member having a base portion, a cover portion and a plurality of blade portions, the base portion and the cover portion being opposed to each other in an axial direction, a through hole being provided in a center of the cover portion, and the plurality of blade portions being arranged in a circumferential direction and being located between the base portion and the cover portion so as to extend from the through hole or a position on an outer circumferential side of the through hole toward an outer circumferential side, the impeller member causing a fluid to flow from the through hole toward the outer circumferential side through a fluid pressurizing space surrounded by the cover portion, the base portion and two blade portions adjacent to each other in the circumferential direction, wherein when an area of the fluid pressurizing space passing through an inner circumferential side end portion of the blade portion and an inner circumferential side opening extending in the circumferential direction is set to a and an area of the fluid pressurizing space passing through the outer circumferential side end portion of the blade portion and an outer circumferential side opening extending in the circumferential direction, the following conditions are satisfied: b is more than or equal to 1.2A and less than or equal to 1.5A.

Description

Pump device

Technical Field

The utility model relates to a pump device.

Background

Conventionally, there is a pump device including an impeller member having a base portion, a cover portion, and a plurality of vane portions, the base portion and the cover portion being opposed to each other in an axial direction, a through hole being provided in a center of the cover portion, the plurality of vane portions being arranged in a circumferential direction, being located between the base portion and the cover portion, and extending from an inner circumferential side toward an outer circumferential side, and the cover portion, the base portion, and two adjacent vane portions in the circumferential direction defining a fluid pressurizing space.

In the pump device, when the impeller member rotates, the fluid sucked into the pump device from the outside flows from the through hole to the outer peripheral side after passing through the fluid pressurizing space and being pressurized, and is then discharged to the outside.

However, in the above-described pump device, it is sometimes difficult to ensure sufficiently high efficiency.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of the above problems, and an object of the present invention is to provide a pump device which can improve the efficiency of a pump.

In order to achieve the above object, the present invention provides a pump device comprising an impeller member having a base portion, a cover portion and a plurality of blade portions, the base portion and the cover portion being axially opposed to each other, a through hole being provided in a center of the cover portion, the plurality of blade portions being arranged in a circumferential direction and being located between the base portion and the cover portion and extending from the through hole or a position on an outer circumferential side of the through hole toward an outer circumferential side, the impeller member causing a fluid to flow from the through hole toward the outer circumferential side through a fluid pressurizing space surrounded by the cover portion, the base portion and two blade portions adjacent to each other in the circumferential direction, wherein when an area of the fluid pressurizing space passing through an inner circumferential side end portion of the blade portion and extending in the circumferential direction is a and an area of the fluid pressurizing space passing through an outer circumferential side end portion of the blade portion and extending in the circumferential direction is B, the following conditions are satisfied: b is more than or equal to 1.2A and less than or equal to 1.5A.

Here, "axial direction" refers to a direction of the rotation axis of the impeller member, "circumferential direction" refers to a circumferential direction around the rotation axis of the impeller member, and "inner circumferential side" and "outer circumferential side" are both based on the rotation axis of the impeller member as a reference.

According to the present invention, when the area of the inner peripheral side opening of the vane passing portion of the fluid pressurizing space and extending in the circumferential direction is defined as a and the area of the outer peripheral side opening of the vane passing portion of the fluid pressurizing space and extending in the circumferential direction is defined as B, the following conditions are satisfied: 1.2A is less than or equal to B is less than or equal to 1.5A, therefore, the efficiency (flow rate/torque) of the pump can be improved.

In the pump device according to the present invention, it is preferable that a surface of the base portion constituting the fluid pressurizing space is a plane perpendicular to an axial direction, and a surface of the cover portion constituting the fluid pressurizing space approaches the base portion from an inner circumferential side toward an outer circumferential side.

According to the present invention, the surface of the base constituting the fluid pressurizing space is a plane perpendicular to the axial direction, and the surface of the cover constituting the fluid pressurizing space approaches the base as going from the inner peripheral side toward the outer peripheral side, so that the axial dimension of the inner peripheral side opening can be easily adjusted, thereby adjusting the area of the inner peripheral side opening.

In the pump device according to the present invention, it is preferable that the vane portion is formed integrally with the cover portion, and an end portion of the vane portion on the base portion side is fixed to the base portion by ultrasonic welding.

According to the pump device of the present invention, the vane portion is formed integrally with the cover portion, and the end portion of the vane portion on the base portion side is fixed to the base portion by ultrasonic welding, so that the assembling work of the impeller member can be simplified, and the overall strength of the impeller member can be improved.

In the pump device of the present invention, it is preferable that a convex portion extending from an inner peripheral side toward an outer peripheral side is provided at an end portion of the vane portion on the base portion side, and the base portion has a groove portion into which the convex portion is fitted.

According to the present invention, since the convex portion extending from the inner peripheral side toward the outer peripheral side is provided on the end surface of the vane portion on the base portion side, and the groove portion into which the convex portion is fitted is provided in the base portion, it is easy to avoid the occurrence of defective products due to the movement of the vane portion relative to the base portion when the welding operation of the vane portion and the base portion is performed.

In the pump apparatus according to the present invention, it is preferable that a hole extending in the axial direction is formed in a bottom portion of the groove portion, and a protrusion portion inserted into the hole is formed in an end portion of the vane portion on the base portion side.

According to the pump device of the present invention, since the hole portion extending in the axial direction is formed in the bottom portion of the groove portion and the projection portion of the insertion hole portion is formed in the end surface of the blade portion on the base portion side, it is easy to reliably avoid the occurrence of defective products due to the movement of the blade portion relative to the base portion when the welding operation of the blade portion and the base portion is performed.

In the pump device according to the present invention, it is preferable that the pump device further includes a pump housing, an outer surface of the cover portion on a side opposite to the base portion is inclined so as to approach the base portion from an inner circumferential side to an outer circumferential side, and an inner surface of the pump housing is formed to be inclined along the outer surface.

According to the present invention, the pump device includes the pump housing, the outer surface of the cover portion on the side opposite to the base portion is inclined so as to approach the base portion from the inner peripheral side toward the outer peripheral side, and the inner surface of the pump housing is formed obliquely along the outer surface of the cover portion, so that the negative pressure can be suppressed more easily.

In the pump device of the present invention, it is preferable that the vane portions extend in an arc shape from the inner peripheral side toward the outer peripheral side.

In the pump device of the present invention, it is preferable that the vane portions extend from an inner peripheral side to an outer peripheral side to peripheral edges of the base portion and the cover portion.

(effects of utility model)

According to the present invention, in the pump device, when the area of the inner peripheral side opening of the vane portion of the fluid pressurizing space extending in the circumferential direction and the area of the outer peripheral side opening of the vane portion of the fluid pressurizing space extending in the circumferential direction are set to a and B, the following conditions are satisfied: 1.2A is less than or equal to B is less than or equal to 1.5A, therefore, the efficiency (flow rate/torque) of the pump can be improved.

Drawings

Fig. 1 is a side sectional view schematically showing a pump device according to an embodiment of the present invention.

Fig. 2 is a sectional view showing the impeller member of the pump device according to the embodiment of the present invention in a drawn state.

Fig. 3 is a perspective view schematically showing a part of an impeller member in the pump device according to the embodiment of the present invention.

Fig. 4 is a perspective view schematically showing another part of the impeller member in the pump device according to the embodiment of the present invention.

Fig. 5 is a graph showing a relationship between an area ratio of an inner peripheral side opening to an outer peripheral side opening of a fluid pressurizing space of the pump device and an efficiency ratio of the pump device.

(symbol description)

1 Pump device

10 pump casing

11 fluid suction inlet

12 fluid discharge port

13 housing part

131 casing barrel

132 Top of the housing portion

20 motor shell

211 barrel part of motor shell

212 Top of Motor housing

213 bottom of motor housing

30 impeller

40 Motor

41 rotor

411 cylindrical part

412 magnet

42 stator

43 bearing

44 fixed shaft

50 circuit board

CP connector section

IM impeller member

BS base

BS1 slot part

BS2 pore section

CV cover part

CV1 through hole

BL blade part

BL1 convex part

BL2 protrusion

PP plate-shaped part

SP fluid pressurized space

OP1 inner peripheral side opening

OP2 opening on the outer periphery side

L rotation axis of impeller

One side in the extending direction of the rotation axis of the L1 impeller

The other side in the extending direction of the rotation axis of the L2 impeller

Detailed Description

Next, a pump device according to an embodiment of the present invention will be described with reference to fig. 1 to 5, in which fig. 2 is a sectional view showing a pump device according to an embodiment of the present invention with an impeller member removed, fig. 3 is a perspective view schematically showing a part of the impeller member in the pump device according to the embodiment of the present invention, fig. 4 is a perspective view schematically showing another part of the impeller member in the pump device according to the embodiment of the present invention, and fig. 5 is a graph showing a relationship between an area ratio of an inner peripheral side opening and an outer peripheral side opening of a fluid pressurizing space of the pump device and an efficiency ratio of the pump device.

(integral construction of Pump device)

As shown in fig. 1, the pump device 1 includes a pump housing 10 and a motor housing 20, wherein the pump housing 10 includes a fluid suction port 11, a fluid discharge port 12, and a housing 13, the housing 13 houses an impeller 30, and the motor housing 20 houses a motor 40 that drives the impeller 30.

Here, when the motor 40 is operated, the impeller 30 is rotated, whereby fluid is sucked into the pump chamber of the pump device 1 from the fluid suction port 11, pressurized, and then discharged to the outside from the fluid discharge port 12.

(Structure of one side of Pump case)

As described above, the pump housing 10 has the fluid suction port 11, the fluid discharge port 12, and the housing portion 13. As shown in fig. 1, the fluid inlet 11 extends in the extending direction (vertical direction in the drawing) of the rotation axis L of the impeller 30. The fluid discharge port 12 extends radially outward with respect to the rotation axis L of the impeller 30 (not limited to extending strictly perpendicular to the rotation axis L). The housing portion 13 forms a pump chamber, and includes a cylindrical portion 131 and a top portion 132, the cylindrical portion 131 rotatably accommodating the impeller 30 and being provided with a discharge pipe constituting the fluid discharge port 12, and the top portion 132 closing one end of the cylindrical portion 131 and being provided with a suction pipe constituting the fluid suction port 11. The impeller 30 has a flat disk shape and includes a plurality of blades that are arranged at intervals around the rotation axis L of the impeller 30 and extend in an arc shape from the rotation axis L side of the impeller 30 toward the radially outer side.

(Structure of one side of Motor case)

As described above, the motor housing 20 houses the motor 40 that drives the impeller 30.

As shown in fig. 1, the motor housing 20 includes a cylindrical portion 211 in which the motor 40 is accommodated, a top portion 212 that closes one end (upper end in the drawing) of the cylindrical portion 211, and a bottom portion 213 that closes the other end (lower end in the drawing) of the cylindrical portion 211, wherein the top portion 212 encloses a pump chamber together with the housing portion 13, the top portion 212 is formed integrally with one end of the cylindrical portion 211, and a recessed portion that is recessed from one side L1 to the other side L2 in the extending direction of the rotation axis L of the impeller 30 and is accommodated in a rotor 41, which will be described later, of the motor 40 is formed in the center thereof, and the bottom portion 213 is formed separately from the cylindrical portion 211 and is fixed to the other end of the cylindrical. A connector portion CP for electrically connecting to the outside and a terminal pin, and a mounting portion (not shown) for connecting the pump device 1 to an external device are provided on a side surface of the motor housing 20.

Further, as shown in fig. 1, the motor 40 has a rotor 41 and a stator 42 surrounding the rotor 41. The rotor 41 has a cylindrical portion 411 provided coaxially with the impeller 30 and having one end connected to the impeller 30, and a magnet 412 provided on the outer peripheral side of the cylindrical portion 411, and is rotatably supported by the fixed shaft 44 via a bearing 43, wherein the bearing 43 has a cylindrical shape extending along the rotation axis L of the impeller 30 and is penetrated by the fixed shaft 44, the fixed shaft 44 extends along the rotation axis L of the impeller 30, the one end (upper end in the figure) is supported by the pump housing 10, and the other end (lower end in the figure) is supported by the motor housing 20. The stator 42 includes a stator core facing the magnet 412 of the rotor 41 at an interval on the outer peripheral side thereof, and a coil wound around the stator core.

As shown in fig. 1, the circuit board 50 is also housed in the cylindrical portion 211 of the motor housing 20, and the circuit board 50 is provided on the other side L2 in the extending direction of the rotation axis L of the impeller 30 with respect to the motor 40, and is electrically connected to the coil of the stator 42 of the motor 40 and the terminal pin provided in the connector portion CP.

(construction of impeller Member)

As shown in fig. 1, the impeller 30 constitutes an impeller member IM together with the cylindrical portion 411 of the rotor 41. Specifically, as shown in fig. 2, the impeller member IM includes a base portion BS, a cover portion CV, and a plurality of (7 in the illustrated example, but not limited to) blade portions BL, the base portion BS includes a cylindrical portion 411, and a plate-like portion PP that is formed integrally with the cylindrical portion 411 and that extends from one end (upper end in the drawing) of the cylindrical portion 411 toward the outer peripheral side, and the plate-like portion PP constitutes the impeller 30 together with the cover portion CV and the plurality of blade portions BL.

As shown in fig. 2, the base portion BS and the cover portion CV face each other in the extending direction of the rotation axis of the impeller member IM (i.e., the rotation axis L of the impeller 30), a through hole CV1 is provided in the center of the cover portion CV, the plurality of blade portions BL are arranged in the circumferential direction and located between the base portion BS and the cover portion CV and extend toward the outer circumferential side from the through hole CV1 or a position on the outer circumferential side of the through hole CV1, and the impeller member IM causes the fluid to flow from the through hole CV1 toward the outer circumferential side through a fluid pressurizing space SP surrounded by the cover portion CV, the base portion BS, and two blade portions BL adjacent in the circumferential direction.

As shown in fig. 2 and 3, the surface of the base portion BS constituting the fluid pressurizing space SP is a plane perpendicular to the direction of the rotation axis of the impeller member IM, and the surface of the cover portion CV constituting the fluid pressurizing space SP is closer to the base portion BS from the inner circumferential side toward the outer circumferential side (i.e., is not perpendicular to the rotation axis of the impeller member IM).

As shown in fig. 2 and 4, the blade portion BL is formed integrally with the cover portion CV (for example, but not limited to, integrally molded with resin), and the end portion of the blade portion BL on the base portion BS side is fixed to the base portion BS by ultrasonic welding. The blade BL extends in an arc shape from the inner periphery side to the outer periphery side, and extends from the inner periphery side to the outer peripheral edges of the base portion BS and the cover portion CV (in the illustrated example, the outer peripheral edge of the base portion BS and the outer peripheral edge of the cover portion CV are on the same cylindrical surface, but the present invention is not limited thereto).

As shown in fig. 2 to 4, at the end of the blade BL on the base BS side, a convex portion BL1 extending from the inner periphery side to the outer periphery side is provided (in the illustrated example, the convex portion BL1 is intermittently formed from the inner periphery side to the outer periphery side, but is not limited thereto and may be continuously formed), and the base BS (in the illustrated example, the plate-shaped portion PP of the base BS) has a groove portion BS1 into which the convex portion BL1 is fitted. As shown in fig. 3 and 4, holes BS2 (one hole in the illustrated example, but not limited thereto) extending in the direction of the rotation axis of the impeller member IM are formed in the bottom of the groove BS1, and protrusions BL2 (one hole in the illustrated example, but not limited thereto) into which the holes BS2 are inserted are formed in the end portions of the blade portions BL on the base portion BS side.

As shown in fig. 1, the outer surface of the cover CV on the side opposite to the base BS is inclined so as to approach the base BS from the inner circumferential side to the outer circumferential side, and the inner surface of the pump housing 10 is formed so as to be inclined along the outer surface of the cover CV.

(influence of the structure of the impeller member on the efficiency of the pump device)

The inventors of the present invention found, through studies, that the ratio of the area of the inner peripheral side opening OP1 extending in the circumferential direction and the inner peripheral side end portion of the blade passing portion BL of the fluid pressurizing space SP to the area of the outer peripheral side opening OP2 extending in the circumferential direction and the efficiency (flow rate/torque) of the pump device 1 has a relationship as shown in fig. 5 (in fig. 5, the unit of the flow rate is L/min, and the unit of the torque is nNm).

Therefore, in the present embodiment, when an area of the inner peripheral side opening OP1 extending in the circumferential direction at the inner peripheral side end portion of the vane portion BL of the fluid pressurizing space SP is a, and an area of the outer peripheral side opening OP2 extending in the circumferential direction at the outer peripheral side end portion of the vane portion BL of the fluid pressurizing space SP is B, the above-described a and B are set so as to satisfy the following conditions: b is more than or equal to 1.2A and less than or equal to 1.5A.

(main technical effects of the present embodiment)

According to the pump device 1 of the present embodiment, when the area of the inner peripheral side opening OP1 extending in the circumferential direction at the inner peripheral side end portion of the vane portion BL of the fluid pressurizing space SP is a, and the area of the outer peripheral side opening OP2 extending in the circumferential direction at the outer peripheral side end portion of the vane portion BL of the fluid pressurizing space SP is B, the following conditions are satisfied: 1.2A is less than or equal to B is less than or equal to 1.5A, therefore, the efficiency (flow rate/torque) of the pump can be improved.

Further, according to the pump device 1 of the present embodiment, the outer surface of the cover portion CV on the side opposite to the base portion BS is inclined so as to approach the base portion BS from the inner circumferential side toward the outer circumferential side, and the inner surface of the pump housing 10 is formed inclined along the outer surface of the cover portion CV, so that the negative pressure can be more easily suppressed.

The present invention has been described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments.

For example, in the above embodiment, the base portion BS of the impeller member IM has the cylindrical portion 411 formed integrally with the plate-like portion PP, but the present invention is not limited to this, and the base portion BS of the impeller member IM may not have the cylindrical portion 411 in some cases, and the shape of the base portion BS may be appropriately changed as needed.

In the above embodiment, the vane portions BL extend in an arc shape from the inner peripheral side toward the outer peripheral side, but the present invention is not limited to this, and the vane portions BL may be formed in other shapes.

In the above embodiment, the blade portion BL extends from the inner periphery side to the outer peripheral edges of the base portion BS and the cover portion CV, but the present invention is not limited to this, and may extend to a position on the inner periphery side of the outer peripheral edges of the base portion BS and the cover portion CV.

In the above embodiment, the end portion of the blade BL on the base BS side is fixed to the base BS by ultrasonic welding, but the present invention is not limited to this, and the blade BL may be fixed to the base BS by another method.

In the above embodiment, the protruding portion BL1 extending from the inner peripheral side toward the outer peripheral side is provided at the end portion of the blade BL on the base portion BS side, and the base portion BS has the groove portion BS1 into which the protruding portion BL1 is fitted, but the present invention is not limited to this, and the protruding portion BL1 and the groove portion BS1 may be omitted in some cases.

In the above embodiment, hole BS2 extending along the rotation axis of impeller member IM is formed in the bottom of groove BS1, and protrusion BL2 of insertion hole BS2 is formed in the end of blade BL on the base BS side.

Further, in the above embodiment, the outer surface of the cover CV on the side opposite to the base BS is inclined so as to approach the base BS from the inner circumferential side toward the outer circumferential side, and the inner surface of the pump housing 10 is formed inclined along the outer surface of the cover CV, but the present invention is not limited thereto, and the outer surface of the cover CV on the side opposite to the base BS and the inner surface of the pump housing 10 may be formed so as to be perpendicular to the rotation axis of the impeller member IM.

It should be understood that the present invention can freely combine the respective components in the embodiments or appropriately change or omit the respective components in the embodiments within the scope thereof.

Claims

1. A pump device including an impeller member having a base portion, a cover portion, and a plurality of blade portions, the base portion and the cover portion being opposed to each other in an axial direction, a through hole being provided at a center of the cover portion, the plurality of blade portions being arranged in a circumferential direction and located between the base portion and the cover portion and extending from the through hole or a position on an outer circumferential side of the through hole toward the outer circumferential side, the impeller member causing a fluid to flow from the through hole toward the outer circumferential side through a fluid pressurizing space surrounded by the cover portion, the base portion, and two blade portions adjacent to each other in the circumferential direction,

when an area of an inner peripheral side opening of the fluid pressurizing space that passes through an inner peripheral side end portion of the vane portion and extends in the circumferential direction is a, and an area of an outer peripheral side opening of the fluid pressurizing space that passes through an outer peripheral side end portion of the vane portion and extends in the circumferential direction is B, the following conditions are satisfied:

1.2A≤B≤1.5A。

2. the pump apparatus of claim 1,

the surface of the base portion constituting the fluid pressurizing space is a plane perpendicular to the axial direction,

the surface of the cover portion constituting the fluid pressurizing space approaches the base portion from the inner circumferential side toward the outer circumferential side.

3. The pump apparatus of claim 1,

the blade part is formed integrally with the hood part,

the end portion of the blade portion on the base portion side is fixed to the base portion by ultrasonic welding.

4. Pump apparatus according to claim 3,

a convex portion extending from an inner peripheral side to an outer peripheral side is provided at an end portion of the vane portion on the base portion side,

the base portion has a groove portion into which the convex portion is fitted.

5. The pump apparatus of claim 4,

a hole part extending along the axial direction is formed at the bottom of the groove part,

a protrusion portion to be inserted into the hole portion is formed at an end portion of the blade portion on the base portion side.

6. The pump apparatus of claim 1,

comprises a pump shell body and a pump body,

an outer surface of the cover portion on a side opposite to the base portion is inclined so as to approach the base portion from an inner circumferential side toward an outer circumferential side,

an inner surface of the pump housing is formed obliquely along the outer surface.

7. The pump apparatus of claim 1,

the blade portions extend in an arc shape from the inner circumferential side toward the outer circumferential side.

8. The pump apparatus of claim 1,

the blade portion extends from an inner peripheral side toward an outer peripheral side to outer peripheral edges of the base portion and the cover portion.