CN112524090B

CN112524090B - Air supply device and electromechanical device

Info

Publication number: CN112524090B
Application number: CN201910884777.1A
Authority: CN
Inventors: 张铁城; 韩振旻; 张学超
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2022-09-20
Anticipated expiration: 2039-09-19
Also published as: CN112524090A

Abstract

The embodiment of the application provides an air supply arrangement and electromechanical device, and this air supply arrangement includes: an impeller; a motor; an impeller cover having a cover portion surrounding a radial outer periphery of the impeller and an upper cover portion located on an axially upper side of the impeller, the upper cover portion having a suction port that opens in an axial direction, the impeller cover further having: a rib extending axially downward from the cover; and a connection portion extending in a circumferential direction from an axially lower end of the rib portion, the connection portion being connected between two adjacent rib portions in a partial circumferential direction, the adjacent rib portions and the covering portion forming a first exhaust port at a portion where the connection portion is not provided, the connection portion, the adjacent rib portions connected to the connection portion, and the covering portion enclosing a second exhaust port at a portion where the connection portion is provided, the impeller cover having at least one first exhaust port and at least one second exhaust port.

Description

Air supply device and electromechanical device

Technical Field

The application relates to the electromechanical field, in particular to an air supply device and electromechanical equipment.

Background

In the centrifugal air supply device, air enters a shell of the air supply device along the axial direction, an impeller in the shell rotates at a high speed under the driving of a motor, so that the air in the shell is accelerated to form radial airflow, and the radial airflow is led out of the shell from an air outlet.

In some centrifugal blower devices, the air outlet is provided with a guide portion for guiding the air flow, the guide portion extending in the radial direction so as to guide the air flow to flow in the radial direction; further, in some centrifugal blower devices, an airflow passage that guides airflow in an axial direction is provided inside the casing.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

The inventor of the present application has found that the existing centrifugal blower device has some limitations, such as: for the air supply device with the guide part extending in the radial direction, the air flow in the shell rotates in the circumferential direction at a high speed, so that the air flow generates high noise when contacting with the guide part extending in the radial direction; in the air supply device provided with the airflow channel for guiding the airflow to flow along the axial direction, although the discharge speed of the air from the shell is improved, the airflow easily flows through the interior of a motor of the air supply device, and impurities such as dust and water vapor in the airflow easily invade the motor and damage the motor.

In order to solve the above-described problems or other similar problems, the present application provides an air supply device in which a first exhaust port and a second exhaust port are provided in a circumferential direction of an impeller shroud, whereby not only the total area of the exhaust ports is increased, but also a radially extending guide portion and an axial air flow passage do not need to be provided, thereby reducing noise and preventing impurities in the air flow from intruding into the inside of a motor, and an electromechanical apparatus.

According to at least one aspect of an embodiment of the present application, there is provided an air blowing device including:

an impeller that rotates about a central axis extending in a vertical direction;

a motor disposed on one axial side of the impeller and configured to rotate the impeller;

an impeller cover having a covering portion surrounding a radial outer periphery of the impeller and an upper cover portion located at an axially upper side of the impeller, the upper cover portion having a suction port opening in an axial direction,

the impeller shroud further has:

a rib extending axially downward from the cover;

a connecting portion extending in a circumferential direction from an axial lower end of the rib portion, the connecting portion being connected between two of the rib portions adjacent in a partial circumferential direction,

wherein the rib portions and the covering portion adjacent to each other form a first exhaust port at a portion where the connection portion is not provided, and the connection portion, the rib portions adjacent to each other connected to the connection portion, and the covering portion enclose a second exhaust port at a portion where the connection portion is provided,

the impeller shroud has at least one said first exhaust port and at least one said second exhaust port.

According to at least one aspect of the embodiment of the present application, wherein the air blowing device further includes a motor cover that houses the motor, a radially outer periphery of the motor cover has a projection that projects radially outward, and an axially lower end surface of the projection abuts against an axially upper end surface of the connecting portion of the impeller cover.

According to at least one aspect of embodiments of the present application, wherein,

the motor cover may further include a groove formed in a radially outer periphery thereof and recessed radially inward, and the rib and the connecting portion may be accommodated in the groove.

the circumferential dimension of the projection is less than or equal to the circumferential dimension of the second exhaust port.

the motor cover has a boss projecting radially outward on the outer periphery thereof,

the boss is located axially below the projection,

the boss is located at least at a position corresponding to the protrusion in the circumferential direction.

According to at least one aspect of embodiments herein, wherein,

a reinforcing rib is formed at an axially lower portion of the boss, extends radially outward from a radially outer periphery of the motor cover, and is connected to the axially lower portion of the boss.

the air supply device is also provided with a rotating shaft rotating around the central axis, a bearing outside the radial direction of the rotating shaft and a sleeve outside the radial direction of the bearing,

the top of the motor cover is located at the radial outer side of the sleeve, and the top of the motor cover is in sealing connection with the sleeve.

the axial lower side of the inner wall of the covering part of the impeller cover is formed into a first inclined surface which extends outwards in the radial direction along the axial lower direction,

the radial outer edge of the top of the motor cover is formed into a second inclined surface extending to the radial inner side along the axial upper direction,

and a gas flow channel enabling gas to flow to the first exhaust port and the second exhaust port is formed between the first inclined surface and the second inclined surface.

at least one first exhaust port is disposed between two adjacent second exhaust ports in the circumferential direction.

the air suction port of the impeller cover is provided with an extension part extending along the lower side of the axial direction.

According to at least one aspect of the embodiments of the present application, there is provided an electromechanical device having the air blowing device described in any one of the above-described embodiments.

The beneficial effect of this application lies in: the present application provides an air supply device and electromechanical device, in this air supply device, the circumference of impeller cover is provided with first exhaust port and second exhaust port, from this, has not only increased the total area of exhaust port, moreover, need not to set up radially extended guide portion and axial air current passageway to inside having reduced the noise and having avoided the impurity in the air current to invade the motor.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is an axial cross-sectional view of an air blowing device of a first aspect of an embodiment of the present application;

fig. 2 is a perspective view of an air blowing device according to a first aspect of an embodiment of the present application.

Detailed Description

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.

In the embodiments of the present application, the terms "first", "second", and the like are used for distinguishing different elements by reference, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "the" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In the following description of the present application, for the sake of convenience of description, a direction in which the center axis of the rotating shaft of the motor extends is referred to as an "axial direction"; in the "axial direction", the direction from the motor toward the impeller is referred to as the "up" direction, and the direction opposite to the "up" direction is the "down" direction; a radial direction centered on the central axis is referred to as a "radial direction"; the direction around the center axis is referred to as "circumferential direction". The above description of the direction is for convenience of illustration only and is not intended to limit the direction of the air supply apparatus of the present application during manufacture and use.

First aspect of the embodiments

A first aspect of an embodiment of the present application provides an air blowing device.

FIG. 1 is an axial cross-sectional view of an air blowing device according to a first aspect of an embodiment of the present application; fig. 2 is a perspective view of an air blowing device according to a first aspect of an embodiment of the present application.

As shown in fig. 1, the air blowing device 100 includes: impeller 1, motor 2 and impeller cover 3.

In at least one embodiment, as shown in FIG. 1: the impeller 1 rotates around a central axis C extending in the vertical direction; the motor 2 is arranged on one axial side of the impeller 1, for example, the motor 2 is positioned on the lower axial side of the impeller 1; the motor 2 drives the impeller 1 to rotate, for example, the rotor 20 of the motor 2 is connected with the rotating shaft 21, the impeller 1 is sleeved on the radial periphery of the rotating shaft 21 and is connected with the rotating shaft 21, and therefore, when the rotor 20 of the motor 2 rotates, the rotating shaft 21 rotates along with the impeller and drives the impeller 1 to rotate; the impeller cover 3 has a covering portion 31 surrounding the outer periphery of the impeller 1 in the radial direction and an upper cover portion 32 located on the upper side in the axial direction of the impeller 1, the upper cover portion 32 having an intake port 3a opening in the axial direction; the cover portion 31 and the upper cover portion 32 of the impeller cup 3 enclose a first accommodation space a1, and the impeller 1 is accommodated in the first accommodation space a 1.

As shown in fig. 2, the impeller cup 3 further has: a rib 33 and a connecting portion 34. Wherein the rib 33 extends axially downward from the covering portion 31; the connecting portion 34 extends from the axially lower end of the rib portion in the circumferential direction, and connects between two adjacent rib portions 33 in a part of the circumferential direction.

As shown in fig. 2, at a portion where the connection portion 34 is not provided, the adjacent rib portion 33 and the covering portion 31 form a first exhaust port 35. The connecting portion 34, the rib 33 adjacent to the connecting portion 34, and the covering portion 31 surround the second air outlet 36 at a portion where the connecting portion 34 is provided.

In a first aspect of the embodiment of the present application, the impeller shroud 3 has at least one first exhaust port 35 and at least one second exhaust port 36.

As shown in fig. 1 and 2, when the rotary shaft 21 rotates, the impeller 1 rotates therewith, and gas enters the first accommodation space a1 (not shown in fig. 2) from the suction port 3a of the impeller housing 3 and is discharged out of the first accommodation space a1 via the first exhaust port 35 and the second exhaust port 36 (not shown in fig. 1).

According to the first aspect of the embodiment of the present application, the first exhaust port and the second exhaust port are provided in the circumferential direction of the impeller cup 3, whereby not only the total area of the exhaust ports is increased, but also the provision of the axial air flow passage and the guide portion extending radially is not required, thereby preventing the intrusion of impurities in the air flow into the interior of the motor and reducing noise.

In at least one embodiment, the relationship between the opening areas of the first exhaust port 35 and the second exhaust port 36 may be, for example: the opening area of the first exhaust port 35 is equal to, larger than, or smaller than the opening area of the second exhaust port 36.

In at least one embodiment, as shown in fig. 2, one first exhaust port 35 is provided between two adjacent second exhaust ports 36 in the circumferential direction. Further, the present application may not be limited thereto, and for example, two or more first exhaust ports 35 may be provided between adjacent two second exhaust ports 36.

As shown in fig. 1 and 2, the air blowing device 100 further includes a motor cover 4. The motor housing 4 serves to accommodate a motor (not shown in fig. 2). The radially outer periphery of the motor cover 4 has a projection 41 projecting radially outward, and an axially downward end surface 41a of the projection 41 abuts against an axially upward end surface 34a of the connecting portion 34 of the impeller cover 3. This allows the protrusion 41 to be engaged with the connecting portion 34 in the axial direction, thereby preventing the motor housing 4 and the impeller housing 3 from being separated in the axial direction.

As shown in fig. 2, the circumferential dimension of the protrusion 41 is smaller than or equal to the circumferential dimension of the second exhaust port 36, whereby the protrusion 41 can be accommodated within the second exhaust port 36.

In at least one embodiment, as shown in fig. 1 and 2, the radially outer periphery of the motor cover 4 is further formed with a groove 42 depressed to the radially inner side, and the rib 33 and the connecting portion 34 are accommodated in the groove 42, whereby the radial dimension of the rib 33 and the connecting portion 34 can be set small. The air supply device is beneficial to realizing the thinning of the air supply device.

As shown in fig. 1 and 2, the radially outer periphery of the motor cover 4 has a boss 43 that protrudes radially outward, the boss 43 is located axially below the protrusion 41, and the boss 43 is located at least at a position corresponding to the protrusion 41 in the circumferential direction. Accordingly, the protrusion 41 and the boss 43 can further restrict the relative position in the axial direction between the motor housing 4 and the impeller shaft 3 by sandwiching the connection portion 34 from both the upper and lower directions in the axial direction. This firmly secures the impeller cup 3 and the motor cup 4. Further, in at least one embodiment, as shown in FIG. 2, the bosses 43 may be disposed along the entire circumference.

As shown in fig. 1, the boss 43 may be formed with a reinforcing rib 44 at an axially lower portion thereof, the reinforcing rib 44 extending radially outward from the radially outer periphery of the motor housing 4 and being connected to the axially lower portion of the boss 43. Thereby, the reinforcing ribs 44 can support the boss 43 from the lower side in the axial direction, and the strength of the boss 43 is improved.

In at least one embodiment, as shown in fig. 1, the axially lower side of the inner wall of the covering portion 31 of the impeller cover 3 is formed as a first slope 31a that extends more radially outward toward the axially lower side, and the radially outer edge of the top portion of the motor cover 4 is formed as a second slope 4b that extends more radially inward toward the axially upper side. The first slope 31a and the second slope 4b form a gas flow passage between them for gas to flow to the first exhaust port 35 and the second exhaust port 36. Thus, in the present application, the passage for guiding the air flow is formed by setting the edge shapes of the impeller cover 3 and the motor cover 4, and there is no need to specially provide the axial air flow passage and the guide portion extending radially to guide the air flow, and therefore, the noise of the present application is small, and the design is more concise.

In at least one embodiment, as shown in fig. 1, the rotary shaft 21 is rotatable about a central axis C, and the air blowing device 100 further includes: a bearing 22 located radially outward of the rotary shaft 21, and a sleeve 23 located radially outward of the bearing 22.

As shown in fig. 1, the top portion 4a of the motor housing 4 is located radially outside the sleeve 23, and the top portion 4a of the motor housing 4 is sealingly connected to the sleeve 23. Therefore, the motor cover 4 and the sleeve 23 can isolate the first accommodating space a1 from the stator 24 of the motor 2, the rotor 23 of the motor and the circuit board 25, and prevent the air flow generated by the rotation of the impeller from flowing through the stator 24, the rotor 23 and the circuit board 25, so as to prevent the impurities such as dust and moisture in the air flow from influencing the operation of the motor 2.

Further, as shown in fig. 1, the impeller cover 3 has an extension portion 3a1 extending axially downward at the inlet 3a, whereby noise at the inlet 3a can be reduced.

Second aspect of the embodiments

A second aspect of the embodiments of the present application provides an electromechanical device having the air blowing device described in the first aspect of the embodiments. Since the structure of the air blowing device has been described in detail in the first aspect of the embodiment, the contents thereof are incorporated herein, and the description thereof is omitted here.

In at least one embodiment, the electromechanical device has a conventional composition in addition to the air supply device, and reference may be made to related technologies, which are not described herein again.

According to the second aspect of the embodiments of the present application, in the air blowing device of the electromechanical apparatus, the first exhaust port and the second exhaust port are provided in the circumferential direction of the impeller shell, whereby not only the total area of the exhaust ports is increased, but also the provision of the axial air flow passage and the guide portion extending in the radial direction is not required, thereby preventing the intrusion of the impurities in the air flow into the inside of the motor and reducing the noise; furthermore, the operation efficiency of the electromechanical device is improved, and the reliability is improved.

The present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the spirit and principles of the application and are within the scope of the application.

Claims

1. An air supply arrangement, comprising:

an impeller cover having a cover portion surrounding a radial outer periphery of the impeller and an upper cover portion located on an axial upper side of the impeller, the upper cover portion having a suction port opening in an axial direction,

it is characterized in that the preparation method is characterized in that,

the impeller shroud further has:

a rib extending axially downward from the cover;

wherein the content of the first and second substances,

the rib portions and the covering portion adjacent to each other form a first exhaust port at a portion where the connecting portion is not provided,

a second air outlet is enclosed by the connecting part, the rib part adjacent to the connecting part and the covering part at the position where the connecting part is arranged,

said impeller shroud having at least one said first exhaust port and at least one said second exhaust port,

the air supply device further includes a motor cover accommodating the motor,

the motor cover has a radially outer periphery having a projection projecting radially outward, and an axially lower end surface of the projection abuts against an axially upper end surface of the connecting portion of the impeller cover.

2. The air supply arrangement as recited in claim 1,

the motor cover may further include a groove recessed radially inward on a radially outer periphery thereof, and the rib and the connecting portion may be accommodated in the groove.

3. The air supply arrangement as recited in claim 1,

4. The air supply arrangement as recited in claim 1,

the boss is located axially below the projection,

5. The air supply arrangement as recited in claim 4,

and a reinforcing rib is formed at the axial lower part of the boss, extends from the radial periphery of the motor cover to the radial outer side, and is connected with the axial lower part of the boss.

6. The blowing apparatus of claim 1,

7. The blowing apparatus of claim 1,

8. The air supply arrangement as recited in claim 1,

9. The blowing apparatus of claim 1,

10. An electromechanical device having the air blowing device of any one of claims 1 to 9.