CN220168218U

CN220168218U - Novel impeller

Info

Publication number: CN220168218U
Application number: CN202320844685.2U
Authority: CN
Inventors: 张叶挺; 高文铭; 王伟立; 胡修柏; 黄旭烽; 俞冬冬; 徐亮亮
Original assignee: Ningbo Langdi Intelligent Mechanical And Electronic Co ltd
Current assignee: Ningbo Langdi Intelligent Mechanical And Electronic Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-12-12
Anticipated expiration: 2033-04-14

Abstract

The utility model relates to the field of centrifugal fan accessories, in particular to a novel impeller. A novel impeller comprises a wheel disc, a plurality of blades connected to the circumferential edge of the wheel disc, and an induced draft ring connected to the outer edge of the end part of each blade; a shaft sleeve connected with a motor shaft is arranged at the center of the wheel disc, a plurality of wheel disc slots are formed in the circumferential edge of the wheel disc, and the inner edges of the blades are inserted into the wheel disc slots; the blade comprises an arc-shaped blade main body and an arc-shaped baffle, wherein the inner end part of the arc-shaped baffle is in transitional connection with the inner edge of the arc-shaped blade main body through an arc angle, and the arc-shaped baffle gradually inclines outwards towards the arc-shaped blade main body until the outer end part of the arc-shaped baffle is pressed against and attached to the middle part of one side of an arc-shaped opening of the arc-shaped blade main body; when the inner edges of the blades are inserted into the wheel disc slots, at least the outer end parts of the arc-shaped baffle plates extend out of the edges of the wheel disc. The novel impeller adopts special wing-shaped blades, so that the installation is more convenient; the running is smoother, the noise is lower, and the blown wind is softer.

Description

Novel impeller

Technical Field

The utility model relates to the field of centrifugal fan accessories, in particular to a novel impeller.

Background

The centrifugal fan mainly comprises a fan volute and a centrifugal impeller arranged in the fan volute, the volute is similar to a snail shell in appearance, an air inlet is formed in the axial side face of the volute, and an air outlet is formed in the circumferential side face of the volute; the interior is constructed with a volute cavity and an air duct communicating the volute cavity with the air outlet, wherein the centrifugal impeller is arranged in the volute cavity. When the centrifugal impeller is in operation, the centrifugal impeller rotates at a high speed under the drive of the motor, the centrifugal impeller throws air flow out of the air outlet in a centrifugal mode, and negative pressure is formed in the volute cavity so as to further intake air from the air inlet.

The conventional centrifugal impeller can refer to the scheme shown in fig. 1 and 2, and comprises a wheel disc 1, a plurality of blades 2 connected to the circumferential edge of the wheel disc 1, and a wind-guiding ring 3 connected to the outer edge of the end part of the blades 2; the center of the wheel disc 1 is provided with a shaft sleeve 4 connected with a motor shaft, a wheel disc slot 11 is obtained on the circumferential edge of the wheel disc 1 by adopting a notching process, and the wheel disc slot 11 comprises an arc-shaped section 112 extending to the edge of the wheel disc 1. The metal blade 2 is an arc-shaped blade 2, when the metal blade is processed, the blade 2 is sleeved into the wheel disc slot 11, and then the wheel disc 1 on two sides of the slot is rolled through a die for press mounting, so that materials are extruded onto the blade 2, and the blade 2 is firmly combined with the wheel disc 1.

However, when such centrifugal impellers are rotated, the inner edges of the blades 2 cut the air flow, and the air is lost when flowing between the blades 2, so that noise and power consumption of the centrifugal impellers are increased.

Moreover, this structure is also difficult to mount the blade 2 in the disk slot 11, and the blade 2 is easily deformed.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a novel impeller which adopts special wing-shaped blades and is more convenient to install; the running is smoother, the noise is lower, and the blown wind is softer.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a novel impeller comprises a wheel disc, a plurality of blades connected to the circumferential edge of the wheel disc, and an induced draft ring connected to the outer edge of the end part of each blade; a shaft sleeve connected with a motor shaft is arranged at the center of the wheel disc, a plurality of wheel disc slots are formed in the circumferential edge of the wheel disc, and the inner edges of the blades are inserted into the wheel disc slots; the method is characterized in that: the blade comprises an arc-shaped blade main body and an arc-shaped baffle, wherein the inner end part of the arc-shaped baffle is in transitional connection with the inner edge of the arc-shaped blade main body through an arc angle, and the arc-shaped baffle gradually inclines outwards towards the arc-shaped blade main body until the outer end part of the arc-shaped baffle is pressed against and attached to the middle part of one side of an arc-shaped opening of the arc-shaped blade main body; when the inner edges of the blades are inserted into the wheel disc slots, at least the outer end parts of the arc-shaped baffle plates extend out of the edges of the wheel disc.

The novel impeller adopts the technical scheme, the novel impeller also adopts a notching process on the circumferential edge of the wheel disc to obtain the wheel disc slot, and then the blades are pressed and inserted into the wheel disc slot to realize the connection of the blades and the wheel disc. On this basis, the blade in this scheme includes arc blade main part and arc separation blade, and the inner end of arc separation blade passes through arc angle transitional coupling with the inner edge of arc blade main part, and the arc separation blade outwards gradually inclines to arc blade main part, until its outer tip presses the middle part of laminating in arc opening one side of arc blade main part. By adopting the scheme, the advantages are that:

1, a deformation space is formed between an arc-shaped blade main body and an arc-shaped baffle of the blade; during the process of inserting the blade into the wheel disc slot, the deformation can be based on, so that the blade insertion process is smoother.

And 2, when the impeller of the centrifugal fan rotates, a vacuum area is formed at the bottom of the blade, and the air flow fills the vacuum area from the air inlet immediately and flows to the surface of the blade along with centrifugal movement. Because the blade is the special wing type blade folding water drop shape, the air flow is guided by the arc shape when passing through the inner edge of the blade, the flowing process is smoother, the noise is lower, the blown wind is softer, and the working efficiency of the impeller is higher.

Preferably, the inner end part of the arc-shaped baffle plate and the inner edge of the arc-shaped blade main body are integrally formed, and the integrally formed blade is higher in strength.

Preferably, the wheel disc slot comprises a round hole and an arc-shaped section extending from the round hole to the primary side of the wheel disc, and the inner edge of the blade is tightly inserted in the arc-shaped section in a tensioning manner. In the technical scheme, the round hole at the inner end of the wheel disc slot is mainly used as a process hole, namely, the wheel disc slot is more convenient to tear and remove. The air flow passage device can be further used as a through hole for the air flow of the chambers on the two sides of the wheel disc. The inner edge of the blade is tightly inserted in the arc section to ensure that the insertion is firmer.

Preferably, arc-shaped turnups which are turned upwards are formed on the wheel discs on two sides of the arc-shaped section of the wheel disc slot; as the blade adopts the wing-shaped blade, the blade is thicker. Therefore, in the scheme, a new tearing port upwarping forming process is adopted at the edge of the wheel disc, namely, arc flanging is formed on the wheel disc at two sides of the arc section, so that the blade is more easily sleeved into the middle disc. When the novel combined type wheel disc is specifically installed, after the blades are sleeved into the wheel disc slots, the upturned wheel disc materials are pressed to a certain degree through the press-fit die, so that the blades are firmly combined with the wheel disc.

Preferably, the wind-guiding ring is welded on the outer edge of the blade end.

Drawings

Fig. 1 is a schematic structural view of a conventional centrifugal impeller.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic view of a novel impeller structure according to the utility model.

Fig. 4 is an enlarged view of a portion B of fig. 3.

Fig. 5 is a schematic view of a blade structure according to the present utility model.

Fig. 6 is a schematic diagram of a wheel disc structure according to the present utility model.

Fig. 7 is a side cross-sectional view of the wheel disc.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

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

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 3-7, the present embodiment relates to a novel impeller, which comprises a wheel disc 1, a plurality of blades 2 connected to the circumferential edge of the wheel disc 1, and a wind-guiding ring 3 connected to the outer edge of the end part of the blades 2; specifically, the induced air ring 3 is welded on the outer edge of the end part of the blade 2. The center of the wheel disc 1 is provided with a shaft sleeve 4 connected with a motor shaft, a plurality of wheel disc slots 11 are formed in the circumferential edge of the wheel disc 1, and the inner edges of the blades 2 are inserted into the wheel disc slots 11.

As shown in fig. 5, the blade 2 includes an arc-shaped blade main body 21 and an arc-shaped baffle 22, the inner end of the arc-shaped baffle 22 is in transitional connection with the inner edge of the arc-shaped blade main body 21 through an arc angle 23, and in a more preferred scheme, the inner end of the arc-shaped baffle 22 and the inner edge of the arc-shaped blade main body 21 are integrally formed, so that the strength of the integrally formed blade 2 is higher. The arc-shaped baffle 22 gradually inclines outwards to the arc-shaped blade main body 21 until the outer end part of the arc-shaped baffle is pressed against and attached to the middle part of one side of the arc-shaped opening of the arc-shaped blade main body 21. When the inner edge of the blade 2 is inserted into the wheel disc slot 11, at least the outer end part of the arc-shaped baffle 22 extends out of the edge of the wheel disc 1.

The novel impeller adopts a notching process to obtain a wheel disc slot 11 on the circumferential edge of the wheel disc 1, and then the blades 2 are pressed and inserted into the wheel disc slot 11, so that the blades 2 are connected with the wheel disc 1. On the basis, the blade 2 in the scheme comprises an arc-shaped blade main body 21 and an arc-shaped baffle 22, wherein the inner end part of the arc-shaped baffle 22 is in transitional connection with the inner edge of the arc-shaped blade main body 21 through an arc angle 23, and the arc-shaped baffle 22 is gradually inclined outwards towards the arc-shaped blade main body 21 until the outer end part of the arc-shaped baffle is pressed against and attached to the middle part of one side of an arc-shaped opening of the arc-shaped blade main body 21. By adopting the scheme, the advantages are that:

1, a deformation space is formed between the arc-shaped blade body 21 and the arc-shaped baffle 22 of the blade 2. During the process of inserting the blade 2 into the wheel slot 11, the deformation can be based on, so that the insertion process of the blade 2 is smoother.

When the impeller of the centrifugal fan rotates, a vacuum area is formed at the bottom of the blade 2, and air flow fills the vacuum area from the air inlet immediately and flows to the surface of the blade 2 along with centrifugal movement. Because the blade 2 is a special wing-shaped blade 2 folding water drop shape, the air flow is guided by an arc shape when passing through the inner edge of the blade 2, the flow process is smoother, the noise is lower, the blown wind is softer, and the working efficiency of the impeller is higher.

In the specific embodiment shown in fig. 4 and 6, the wheel disc slot 11 includes a circular hole 111, and an arc-shaped section 112 extending from the circular hole 111 to the primary side of the wheel disc 1, and the inner edge of the blade 2 is in tension fit in the arc-shaped section 112. In this technical solution, the circular hole 111 at the inner end of the wheel slot 11 is mainly used as a process hole, i.e. it is more convenient to tear and remove the wheel slot 11. And the two side chambers of the wheel disc 1 can be further used as through holes for air flow. The inner edge of the blade 2 is tightly inserted in the arc-shaped section 112 in a tensioning manner so as to ensure that the insertion is firmer. In a further embodiment shown in fig. 6 and 7, the wheel disc 1 on both sides of the arc-shaped section 112 of the wheel disc slot 11 is formed with an arc-shaped flange 13 turned upwards. Since the airfoil-shaped blade 2 is adopted as the blade 2, the blade 2 is thicker. Therefore, in the scheme, a new tearing opening upwarping forming process is adopted at the edge of the wheel disc 1, namely, arc flanges 13 are formed on the wheel disc 1 at two sides of the arc section 112, so that the blade 2 is more easily sleeved into the middle disc. During specific installation, after the blades 2 are sleeved into the wheel disc slots 11, the upturned wheel disc 1 is pressed to a certain degree through a press-fit die, so that the blades 2 are firmly combined with the wheel disc 1.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims

1. A novel impeller comprises a wheel disc (1), a plurality of blades (2) connected to the circumferential edge of the wheel disc (1), and a wind-guiding ring (3) connected to the outer edge of the end part of the blades (2); a shaft sleeve (4) connected with a motor shaft is arranged at the center of the wheel disc (1), a plurality of wheel disc slots (11) are formed in the circumferential edge of the wheel disc (1), and the inner edges of the blades (2) are inserted into the wheel disc slots (11); the method is characterized in that: the blade (2) comprises an arc-shaped blade main body (21) and an arc-shaped baffle (22), wherein the inner end part of the arc-shaped baffle (22) is in transitional connection with the inner edge of the arc-shaped blade main body (21) through an arc angle (23), and the arc-shaped baffle (22) is gradually inclined outwards to the arc-shaped blade main body (21) until the outer end part of the arc-shaped baffle is pressed against and attached to the middle part of one side of an arc-shaped opening of the arc-shaped blade main body (21); when the inner edge of the blade (2) is inserted into the wheel disc slot (11), at least the outer end part of the arc-shaped baffle piece (22) extends out of the edge of the wheel disc (1).

2. A novel impeller according to claim 1, wherein: the inner end part of the arc-shaped baffle piece (22) and the inner edge of the arc-shaped blade main body (21) are integrally formed.

3. A novel impeller according to claim 1 or 2, characterized in that: the wheel disc slot (11) comprises a round hole (111) and an arc-shaped section (112) extending from the round hole (111) to the primary side of the wheel disc (1), and the inner edge of the blade (2) is tightly inserted into the arc-shaped section (112) in a swelling manner.

4. A novel impeller according to claim 3, characterized in that: an upward-turned arc-shaped flanging (13) is formed on the wheel disc (1) at two sides of the arc-shaped section (112) of the wheel disc slot (11).

5. A novel impeller according to claim 1, wherein: the induced air ring (3) is welded on the outer edge of the end part of the blade (2).