CN213981336U

CN213981336U - Staggered backward centrifugal wind wheel

Info

Publication number: CN213981336U
Application number: CN202022455623.1U
Authority: CN
Inventors: 叶涛; 覃万翔; 韦宏茂; 罗伟乐; 王汉波; 程守炤; 罗华; 吴思铭
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-08-17
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a staggered backward centrifugal wind wheel, which comprises a wheel disc, wherein the wheel disc comprises an inner ring part and an outer ring part, the boundary between the inner ring part and the outer ring part is a circular boundary, the inner ring part is provided with inner ring blades, and the outer ring part is provided with outer ring blades; the positions of the inner ring blades and the outer ring blades are staggered; by adopting the staggered arrangement design of the inner ring blades and the outer ring blades of the wheel disc, the pressure difference between the pressure surface and the suction surface is utilized to blow away the low-speed airflow on the suction surface side after the high-speed airflow on the pressure surface is sprayed out from the gap flow channel of the staggered blades so as to weaken the separation, thereby reducing the influence of the boundary separation of the suction surface of the impeller and the structure of an outlet wake on a flow field.

Description

Staggered backward centrifugal wind wheel

Technical Field

The utility model relates to a centrifugal wind wheel technical field, especially a backward centrifugal wind wheel after blade arrangement mode improvement.

Background

The backward centrifugal wind wheel at least comprises a wheel disc and blades or comprises the wheel disc, a wheel cover and the blades. In practice, it is found that strong secondary flows exist between the wheel disc and the wheel cover, and between the pressure surface and the suction surface of the backward centrifugal wind wheel, so that the flow field of the impeller outlet of the backward centrifugal wind wheel is very uneven, and an obvious wake structure is generated. The wake structure increases the flow loss inside the impeller, reduces the efficiency and reduces the matching between the impeller and the elements behind the impeller. Thus, the outlet jet-wake configuration actually has a large impact on the performance of the centrifugal fan.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a centrifugal wind wheel behind staggered arrangement formula.

The utility model provides a technical scheme that its technical problem adopted is: the staggered backward centrifugal wind wheel comprises a wheel disc, wherein the wheel disc comprises an inner ring part and an outer ring part, a boundary between the inner ring part and the outer ring part is a circular boundary, inner ring blades are arranged on the inner ring part, and outer ring blades are arranged on the outer ring part; the positions of the inner ring blades and the outer ring blades are staggered, wherein the circular dividing line is the staggered dividing line between the inner ring blades and the outer ring blades.

According to the utility model provides a backward centrifugal wind wheel, inner circle blade through adopting the rim plate, outer lane blade divide into inside, outer two-layer staggered arrangement formula arranges the design, utilize pressure difference between pressure face and suction surface, make pressure face high-speed air current blow away the low-speed air current of suction surface side after the blowout of staggered blade crack runner in order to weaken the separation, reduce the influence of impeller suction surface boundary separation and export wake structure convection current field with this, improve export flow uniformity, strengthen the matching nature of impeller and other back components, improve the fan wholeness ability.

As some preferred embodiments of the present invention, the staggered angle between the inner ring blade and the outer ring blade is W, and the range of W is 1 ° to 20 °.

As some preferred embodiments of the present invention, the diameter of the wheel disc is D1, the inner diameter of the inner ring blade is D2, and the diameter of the circular dividing line is D3, wherein the relationship between D1, D2 and D3 satisfies D1 > D3 > D2, and the value range of D1, D2 and D3 satisfies D3 ═ K (D1+ D2), wherein the value range of K is 0.4-0.6.

As some preferred embodiments of the present invention, the blade thickness of the inner ring blade is the same as that of the outer ring blade.

The utility model has the advantages that: the inner ring blades and the outer ring blades of the wheel disc are divided into an inner layer and an outer layer which are arranged in a staggered mode, so that the effect of airflow at the outlet of the backward centrifugal wind wheel is improved, the full pressure energy of the backward centrifugal wind wheel can be effectively improved, and the efficiency of the wind wheel is also improved.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of the present invention;

fig. 2 is a plan view of the present invention.

Reference numerals: disk 100, inner ring portion 110, inner ring blades 111, outer ring portion 120, outer ring blades 121.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the inventive subject matter may be implemented without these specific details, i.e., those skilled in the art will be able to more effectively describe the nature of their work to others skilled in the art using the description and illustrations herein. It should be further noted that the terms "upper" and "lower" and the like used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component, and that simple, non-inventive adjustments to such directions by those skilled in the art should not be construed as techniques outside the scope of the present application. It should be understood that the specific embodiments described herein are merely illustrative of the present application and do not limit the scope of the actual protection. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe arrangements, etc., have not been described in detail since they are readily understood by those of ordinary skill in the art, in order to avoid obscuring the present invention.

Fig. 1 is a perspective view of an embodiment of the present invention, referring to fig. 1, an embodiment of the present invention provides a staggered backward centrifugal wind wheel, including a wheel disc 100, the wheel disc 100 including an inner ring portion 110 and an outer ring portion 120. Where inner portion 110 is the central (or center) portion of wheel disc 100 and outer portion 120 is the outboard (generally annular) portion of wheel disc 100. Referring to fig. 2, a boundary between the inner ring portion 110 and the outer ring portion 120 is a circular boundary, the inner ring portion 110 is provided with inner ring blades 111, and the outer ring portion 120 is provided with outer ring blades 121.

The positions of the inner ring blades 111 and the outer ring blades 121 are staggered, wherein a circular boundary is a staggered boundary between the inner ring blades 111 and the outer ring blades 121, that is, the inner ring blades 111 and the outer ring blades 121 are divided into an inner layer and an outer layer and are staggered (staggered) with each other. It should be noted that the design of the blades of different shapes and sizes in the present technology is different from the design of the blades of different shapes and sizes in the existing design, and the design of the blades of different shapes on the outer side and the inner side of the same blade is different. The staggered design between the inner ring blades 111 and the outer ring blades 121 utilizes the pressure difference between the pressure surface and the suction surface, the high-speed airflow of the pressure surface is sprayed out from the gap flow channel of the staggered blades to blow away the low-speed airflow on the suction surface side to weaken the separation, thereby reducing the influence of the boundary separation of the suction surface of the impeller and the flow field of the outlet wake structure, improving the flow uniformity of the outlet, enhancing the matching property of the impeller and other elements and improving the overall performance of the fan.

Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details of one or more embodiments are not fixedly presented in any particular order, and are not intended to limit the invention.

In embodiment 1, the number of the inner ring blades 111 is the same as that of the outer ring blades 121, so that the working stability of the backward centrifugal wind wheel is further ensured.

In this embodiment, optionally, the number of the inner ring blades 111 and the outer ring blades 121 ranges from 7 to 20.

In this embodiment, optionally, the staggered angle between the inner ring blades 111 and the outer ring blades 121 is W, and the range of W is 1 ° to 20 °, so that the size of the gap between the inner ring blades 111 and the outer ring blades 121 arranged in a staggered manner is more reasonable, and the airflow effect is further improved.

In embodiment 2, the diameter of the wheel disc 100 is D1, the inner diameter of the inner ring blade 111 is D2, and the diameter of the circular dividing line is D3, wherein the relation among D1, D2, and D3 satisfies D1 > D3 > D2, and the value ranges of D1, D2, and D3 satisfy D3-KD 1+ D2, wherein the value range of K is 0.4-0.6, and the wind wheel efficiency is further ensured.

In embodiment 3, the blade thickness of the inner ring blade 111 is the same as that of the outer ring blade 121, so that the working stability of the backward centrifugal wind wheel is further ensured.

In the present embodiment, the heights of the inner ring blades 111 and the outer ring blades 121 are optionally the same.

In embodiment 4, the number of inner ring blades 111 is different from that of outer ring blades 121. In this embodiment, optionally, the number of the inner ring blades 111 and the outer ring blades 121 is in a range of 7 to 20.

In embodiment 5, inner ring blades 111 and outer ring blades 121 are both distributed on the upper side of disk 100. A wind wheel motor (not shown) is located on the underside of wheel disc 100 to control the rotation of the centrifugal wind wheel. The upper side of the backward centrifugal wind wheel is in the direction of an airflow inlet, and then airflow flows out from the outlet of the impeller on the side of the backward centrifugal wind wheel.

According to the above principle, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention.

Practice proves that compared with the original wind wheel full pressure, the backward centrifugal wind wheel adopting the new technology can be improved by 6%, and meanwhile, the efficiency of the wind wheel can be improved by more than 3%.

Claims

1. The utility model provides a staggered formula is to centrifugal wind wheel backward, includes rim plate (100), its characterized in that:

the wheel disc (100) comprises an inner ring part (110) and an outer ring part (120), a dividing line between the inner ring part (110) and the outer ring part (120) is a circular dividing line, inner ring blades (111) are arranged on the inner ring part (110), and outer ring blades (121) are arranged on the outer ring part (120);

the positions of the inner ring blade (111) and the outer ring blade (121) are staggered, wherein the circular dividing line is the staggered dividing line between the inner ring blade (111) and the outer ring blade (121).

2. The staggered backward centrifugal wind wheel according to claim 1, wherein: the staggered angle between the inner ring blade (111) and the outer ring blade (121) is W, and the range of W is 1-20 degrees.

3. The staggered backward centrifugal wind wheel according to claim 1, wherein: the diameter of the wheel disc (100) is D1, the inner diameter of the inner ring blade (111) is D2, the diameter of the circular dividing line is D3, the relation among D1, D2 and D3 meets the condition that D1 is larger than D3 is larger than D2, meanwhile, the value ranges of D1, D2 and D3 meet the condition that D3 is equal to K (D1+ D2), and the value range of K is 0.4-0.6.

4. The staggered backward centrifugal wind wheel according to claim 1, wherein: the blade thickness of the inner ring blade (111) is the same as that of the outer ring blade (121).