CN210889465U

CN210889465U - Fan volute coaming and fan volute structure

Info

Publication number: CN210889465U
Application number: CN201920728126.9U
Authority: CN
Inventors: 陆锡佳; 陆国浇; 彭湃; 湛广永; 潘华; 王成合; 潘艳; 沈朝晖; 陆亚华
Original assignee: Foshan Nanhai Nanyang Electric Appliance&motor Co ltd
Current assignee: Foshan Nanhai Nanyang Electric Appliance&motor Co ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-06-30
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a fan volute casing coaming plate, which comprises a coaming plate body, wherein an extension bus is arranged on the coaming plate body, the extension bus is provided with a construction center, a connecting line of the construction center and an initial point is called as an initial line, and a connecting line of the construction center and an arbitrary point is called as an arbitrary line; an included angle theta is formed between any line and the initial line, the length of any line is R, and the R is p + q theta, wherein p and q are constants; the included angle theta ranges from 0 to a, wherein a is a constant, and a ranges from 1.97 to 2.04. The constant a defines the total length of the enclosing plate body, the constants p and q define the shape of the enclosing plate body, the enclosing plate body with the length and the shape is beneficial to the flow of fluid in the fan, the maximum air quantity, the maximum static pressure and the product of the air quantity and the pressure of the fan can be used for improving the maximum air quantity, the maximum static pressure and the product of the air quantity and the pressure, and the noise of the fan can be reduced. The utility model is used for centrifugal fan. And simultaneously, the utility model also provides a fan spiral case structure of using above-mentioned bounding wall.

Description

Fan volute coaming and fan volute structure

Technical Field

The utility model relates to a fan field, in particular to fan spiral case.

Background

According to the difference of the action principle of the fan, the fan has two types of a blade type fan and a capacity type fan. The vane type fan transfers energy to gas through rotation of an impeller, and can be divided into a centrifugal fan, an axial flow fan and a mixed flow fan, wherein the centrifugal fan mainly comprises a fan volute and a fan impeller. The evaluation index of the performance of the centrifugal fan comprises the product of air volume and pressure, namely the product of maximum air volume and maximum static pressure. The maximum air quantity and the maximum static pressure of the existing centrifugal fan need to be improved. In addition, the existing centrifugal fan generates large noise when working.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: a fan volute shroud for a centrifugal fan is provided.

The utility model provides a solution of its technical problem is:

a volute casing coaming plate for a fan comprises a coaming plate body which extends in the front-back direction and is uniform in wall thickness, wherein an arc-shaped extension bus is arranged on the coaming plate body, and the extension bus is stretched in the front-back direction to form the outer surface of the coaming plate body; the extension bus comprises a diffusion section, the end point of the diffusion section in the anticlockwise direction is a starting point, and all points of the diffusion section except the starting point are called as any points; the extension bus is provided with a construction center, a connecting line of the construction center and the starting point is called a starting line, and a connecting line of the construction center and any point is called any line; an included angle theta is formed between any line and the initial line, the length of any line is R, the R is p + q theta, p and q are constants, p is 80 mm to 90 mm, and q is 10 mm to 13 mm; the value range of the angle theta is 0 to a, wherein a is a constant, and a is 1.97 to 2.04.

As a further improvement of the above technical solution, an end point of the diffuser section in the clockwise direction is a termination point, a connection line between the termination point and the structural center is called a termination line, the termination line forms an included angle B with the horizontal direction, and the included angle B is 4 to 5 degrees; the extension bus also comprises a left line segment extending upwards, and the lower end of the left line segment is connected with the termination point.

As a further improvement of the technical scheme, the extension bus further comprises a right line segment and a transition arc which extend upwards, and the transition arc is tangent to the lower end of the right line segment and the right end of the diffuser segment respectively.

As a further improvement of the above technical solution, the radius of the transition arc is 12 mm to 16 mm.

As a further improvement of the above technical solution, a distance between the left line segment and the right line segment is s, and s is 84 mm to 90 mm.

As a further improvement of the above technical solution, the thickness of the coaming body is t, and t is 0.8 mm to 1.2 mm.

The utility model provides a fan spiral case structure, includes above-mentioned fan spiral case bounding wall, the bounding wall body has front opening, back opening, and front opening coats and is stamped the front shroud, back opening coats and is stamped the back shroud.

As a further improvement of the above technical solution, the front cover plate is provided with an air inlet, and the thickness of the front cover plate is 1 mm to 1.5 mm.

As a further improvement of the technical scheme, the rear cover plate is provided with a motor mounting opening, and the thickness of the rear cover plate is 1 mm to 1.5 mm.

The utility model has the advantages that: the constant a defines the total length of the enclosing plate body, the constants p and q define the shape of the enclosing plate body, the enclosing plate body with the length and the shape is beneficial to the flow of fluid in the fan, the maximum air quantity, the maximum static pressure and the product of the air quantity and the pressure of the fan can be used for improving the maximum air quantity, the maximum static pressure and the product of the air quantity and the pressure, and the noise of the fan can be reduced. The utility model is used for centrifugal fan.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a schematic structural view of an embodiment of a volute enclosure of a blower according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a volute structure of a blower according to the present invention;

fig. 3 is a front view of the embodiment of the volute structure of the blower of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.

Referring to fig. 1 to 3, this is an embodiment of the present invention, a blower volute enclosing plate and a blower volute structure, specifically:

a volute casing coaming of a fan comprises a coaming body 100 which extends along the front-back direction and has uniform wall thickness, wherein an arc-shaped extension bus 110 is arranged on the coaming body 100, and the extension bus 110 is stretched along the front-back direction to form the outer surface of the coaming body 100; the extension bus 110 comprises a diffusion section 111, the end point of the diffusion section 111 in the counterclockwise direction is a starting point, and each point of the diffusion section 111 except the starting point is called an arbitrary point; the extended bus 110 has a structure center, a connection line between the structure center and the starting point is called a starting line 121, and a connection line between the structure center and any point is called an arbitrary line 122; an included angle theta is formed between any line 122 and the starting line 121, the length of any line 122 is R, the R is p + q theta, p and q are constants, p is 80 mm to 90 mm, and q is 10 mm to 13 mm; the value range of the angle theta is 0 to a, wherein a is a constant, and a is 1.97 to 2.04. The constant a defines the total length of the shroud body 100, and the constants p and q define the shape of the shroud body 100, and the shroud body 100 with the length and the shape is beneficial to the flow of fluid in the fan, can be used for improving the maximum air quantity, the maximum static pressure and the product of the air quantity and the pressure, and can be used for reducing the noise of the fan.

The data of the fans with the constant a, the constant p and the constant q in three different values shown in table 1, different shapes from other enclosure bodies 100 and the same structures of other parts, hereinafter referred to as the existing fans, are tested, and the measured data are shown in table 2. Wherein the bounding wall body 100 of current fan also can be used the utility model discloses a characteristic describes, and the value of the constant a, constant p, constant q of corresponding after the conversion also shows in table 1.

Table 1:

table 2:

through the measured data of table 2, can understand the utility model discloses a bounding wall body 100 under numerical value 1, numerical value 2, numerical value 3's the value condition, the biggest amount of wind, the biggest static pressure, the product of the amount of wind pressure all have great improvement for the contrast fan, and the noise level obviously descends simultaneously.

The utility model discloses a total length and shape of bounding wall body 100 are the creative setting through structural feature such as constant a, constant p, constant q and carry out the organic configuration to these parameters, let the utility model discloses have the numerical value of bigger maximum amount of wind, maximum static pressure, amount of wind pressure product.

Based on the embodiment of the utility model discloses a numerical value 2, through directly replacing constant a in the contrast fan by 2.01 (hereinafter referred to as contrast 1), or replace constant p in the contrast fan by 85 (hereinafter referred to as contrast 2), or replace constant q in the contrast fan by 12 (hereinafter referred to as contrast 3), the value of contrast 1, contrast 2, contrast 3's constant a, constant p, constant q after the single characteristic of the bounding wall body 100 of contrast fan replaces is shown in table 3:

table 3:

the data detection is performed on the technologies of comparison 1, comparison 2 and comparison 3, and the related index data is shown in table 4:

table 4:

comparing the data in tables 2 and 4, it can be known that the total length or the shape of the shroud body 100 is changed by independently setting the constant a, the constant p and the constant q, the performance index data obtained by detection has little difference with the comparison fan, and the performance index of the comparison fan is difficult to improve; and combine above-mentioned characteristic to through rationally setting up, just can let the utility model discloses can be used for improving the maximum amount of wind, the biggest static pressure of fan, amount of wind pressure product, can be used for reducing the noise of fan.

Further as a preferred embodiment, an end point of the diffuser section 111 in the clockwise direction is a termination point, a connection line between the termination point and the structural center is called a termination line 123, the termination line 123 forms an included angle B with the horizontal direction, and the included angle B is 4 degrees to 5 degrees; the extended bus 110 further includes a left line segment 112 extending upward, and a lower end of the left line segment 112 is connected to the termination point. Because the extension bus 110 is stretched along the front-back direction to form the outer surface of the enclosure body 100 and the wall thickness of the enclosure body 100 is uniform, the left line segment 112 enables the enclosure body 100 to further have a straight section extending upwards at the end point, and the straight section can be used for forming an air outlet of a fan, so that the enclosure body 100 plays a better role in improving the product of air volume and pressure.

In a further preferred embodiment, the extended bus 110 further includes a right line segment 113 extending upward, and a transition arc 114, and the transition arc 114 is tangent to a lower end of the right line segment 113 and a right end of the diffuser segment 111, respectively. Because the extension bus 110 is stretched along the front-back direction to form the outer surface of the coaming body 100 and the wall thickness of the coaming body 100 is uniform, a transition arc 114 is arranged between the lower end of the right line segment 113 and the actual starting point, so that the coaming body 100 can be provided with another straight segment on the right side, and the straight segment can be used for forming an air outlet of a fan, so that the coaming body 100 can play a better role in improving the product of air volume and pressure.

Further as a preferred embodiment, the radius of the transition arc 114 is 12 mm to 16 mm. When the radius of the transition arc 114 is 12 mm to 16 mm, actual measurement shows that the product of the air volume and the pressure can be effectively improved by about 1.2%.

In a further preferred embodiment, the distance between the left line segment 112 and the right line segment 113 is s, and s is 84 mm to 90 mm. The air volume pressure product of the fan with the coaming body 100 can be improved by about 1% when the spacing s is 84 mm to 90 mm.

Further as a preferred embodiment, the thickness of the shroud body 100 is t, and t is 0.8 mm to 1.2 mm. When thickness t is 0.8 millimeter to 1.2 millimeter, can make bounding wall body 100 obtain better effect in the aspect of the noise reduction, the actual measurement can further make the noise level reduce 2% to 4%.

A fan volute structure comprises the fan volute enclosing plate, wherein the enclosing plate body 100 is provided with a front opening and a rear opening, the front opening is covered with a front cover plate 200, and the rear opening is covered with a rear cover plate 300. In the fan with the fan volute structure, the product of the maximum air quantity, the maximum static pressure and the air quantity pressure can be effectively improved, and the noise of the fan is effectively reduced.

Further as a preferred embodiment, the front cover plate 200 is provided with an air inlet 210, and the thickness of the front cover plate 200 is 1 mm to 1.5 mm. The vibration of the front cover 200 may affect the noise level of the fan, and the detection shows that when the thickness of the front cover 200 is 1 mm to 1.5 mm, the noise of the fan with the front cover 200 can be further reduced by about 0.5%.

Further as a preferred embodiment, the rear cover plate 300 is provided with a motor mounting opening 310, and the thickness of the rear cover plate 300 is 1 mm to 1.5 mm. The vibration of the back cover 300 may affect the noise level of the fan, and the noise of the fan having the back cover 300 can be further reduced by about 0.8% when the thickness of the back cover 300 is 1 mm to 1.5 mm through detection.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. The utility model provides a fan spiral case bounding wall which characterized in that: the wall board comprises a wall board body (100) which extends along the front-back direction and has uniform wall thickness, wherein an arc-shaped extension bus (110) is arranged on the wall board body (100), and the extension bus (110) is stretched along the front-back direction to form the outer surface of the wall board body (100); the extension bus (110) comprises a diffusion section (111), the end point of the diffusion section (111) in the anticlockwise direction is used as a starting point, and each point of the diffusion section (111) except the starting point is called as an arbitrary point; the extension bus (110) is provided with a structure center, a connecting line of the structure center and the starting point is called a starting line (121), and a connecting line of the structure center and any point is called an arbitrary line (122); an included angle theta is formed between any line (122) and the starting line (121), the length of any line (122) is R, the R is p + q theta, p and q are constants, p is 80 mm to 90 mm, and q is 10 mm to 13 mm; the included angle theta ranges from 0 to a, wherein a is a constant, and a ranges from 1.97 to 2.04.

2. A blower volute shroud according to claim 1, wherein: the end point of the diffusion section (111) in the clockwise direction is a termination point, a connecting line between the termination point and the construction center is called a termination line (123), an included angle B is formed between the termination line (123) and the horizontal direction, and the included angle B is 4-5 degrees; the extension bus (110) further comprises a left line segment (112) extending upwards, and the lower end of the left line segment (112) is connected with the termination point.

3. A blower volute shroud according to claim 2, wherein: the extension bus (110) further comprises a right line segment (113) and a transition arc (114) which extend upwards, and the transition arc (114) is tangent to the lower end of the right line segment (113) and the right end of the diffuser segment (111) respectively.

4. A blower volute shroud according to claim 3, wherein: the radius of the transition circular arc (114) is 12 mm to 16 mm.

5. A blower volute shroud according to claim 3 or claim 4, wherein: the distance between the left line segment (112) and the right line segment (113) is s, and s is 84 mm to 90 mm.

6. A blower volute shroud according to claim 5, wherein: the thickness of the coaming body (100) is t, and t is 0.8 mm to 1.2 mm.

7. A blower volute structure comprising the blower volute enclosure of any one of claims 1 to 6, wherein: the coaming body (100) is provided with a front opening and a rear opening, the front opening is covered with a front cover plate (200), and the rear opening is covered with a rear cover plate (300).

8. The blower volute structure of claim 7, wherein: an air inlet (210) is formed in the front cover plate (200), and the thickness of the front cover plate (200) ranges from 1 mm to 1.5 mm.

9. The blower volute structure of claim 8, wherein: the rear cover plate (300) is provided with a motor mounting opening (310), and the thickness of the rear cover plate (300) is 1-1.5 mm.