CN217002407U - Wind guide ring structure beneficial to reducing noise of rotation order - Google Patents
Wind guide ring structure beneficial to reducing noise of rotation order Download PDFInfo
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- CN217002407U CN217002407U CN202123039010.0U CN202123039010U CN217002407U CN 217002407 U CN217002407 U CN 217002407U CN 202123039010 U CN202123039010 U CN 202123039010U CN 217002407 U CN217002407 U CN 217002407U
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Abstract
The utility model provides an air guide ring structure beneficial to reducing the rotation order noise, which is arranged at an air outlet of an air cover, wherein the air outlet of the air cover comprises an air guide ring, a plurality of bosses which are arranged around the circumference are arranged on the air guide ring, the upper part of any boss is connected with a retaining ring at the center inside the air guide ring through a reinforcing rib, an open slot with an upward opening is arranged on the air guide ring between any two adjacent bosses, and at least one air guide blade is arranged in the open slot; one end and the bottom surface of the air guide blade are connected with the open slot close to the air guide blade into a whole, and a first space is reserved between the other end of the air guide blade and the open slot close to the air guide blade. The utility model adopts the structure that a plurality of open slots are arranged on the wind guide ring, and the specific position, angle and height of the wind guide blade required to be added on the wind guide ring are analyzed according to the design blade profile of the existing wind blade and by combining the flow field analysis and the sound field distribution of the noise test, so that the application range is wide; the insert is added on the basis of the existing die to produce the guide blade, so that the die does not need to be re-opened, and the production cost is reduced.
Description
Technical Field
The utility model relates to the technical field of wind covers, in particular to a wind guide ring structure beneficial to reducing rotation order noise, which is applied to new energy vehicle types and occasions with prominent main order noise of vehicle inner and outer fan blades of fan products with high NVH performance requirements.
Background
At present, traditional direct current has brush motor and brushless motor fan, at wind-guiding circle position, the air outlet water conservancy diversion structure of design is as shown in fig. 1, wind-guiding circle all adopts wind-guiding inner circle 2 and wind-guiding outer lane 1 that the interval was arranged, wherein the cross-section of wind-guiding outer lane 1 is for erectting the Z type structure of putting, wind-guiding inner circle 2 is J type structure, wind-guiding circle position height need be higher than fan blade turn-ups height, so both can guarantee the flow and not lose, also can guarantee wind-guiding circle and holistic design intensity, there are following technical defect: 1) the height of the wind guide ring needs to determine the specific placement position, height and angle according to the size matched with the system design and the blade profile of the fan blade, and the specific design parameters can be given only by abundant design experience and experimental data, so that the universal effect is poor; 2) the wind guide ring structure is basically a uniform and axially symmetrical design structure, the height and the direction are unified, and the problems of flow field directionality and sound phase angle when the fan blades rotate cannot be considered at all, for example, a local position in a vehicle has a phenomenon of high noise, and higher difficulty requirements are provided for the design of a fan air inlet structure and the design of a fan air outlet structure; 3) the traditional means for improving the noise of the order, including improvement of fan blade profile, improvement of fan cover overall design, improvement of rib shape, improvement of matching space and the like, all need to be produced by a mold again, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides the air guide ring structure which is beneficial to reducing the rotation order noise so as to solve at least one technical problem.
The technical scheme of the utility model is as follows: the air guide ring structure is favorable for reducing the rotation order noise and is arranged at an air outlet of an air cover, the air outlet of the air cover comprises an air guide ring, a plurality of bosses which are arranged around the circumference are arranged on the air guide ring, the upper part of any boss is connected with a retaining ring at the center inside the air guide ring through a reinforcing rib, an open slot with an upward opening is arranged on the air guide ring between any adjacent bosses, and at least one air guide blade is arranged in the open slot; one end and the bottom surface of the air guide blade are connected with the open slot close to the air guide blade into a whole, a first space is reserved between the other end of the air guide blade and the open slot close to the air guide blade, the arc length of the first space is calculated according to fluid noise, and the first space passes physical verification.
The air guide ring is provided with the plurality of open slots, the air guide ring does not need to be redesigned according to the size matched with the system design and the blade profile of the fan, the air inlet structure and the air outlet structure of the fan do not need to be redesigned, and the specific position, angle and height of the air guide blade to be added on the air guide ring are analyzed only according to the blade profile of the existing fan blade design and in combination with the sound field distribution of flow field analysis and noise test, so that the application range is wide; the insert is added on the basis of the existing die to produce the air guide blade, so that noise optimization can be completed through small change, a large amount of time, manpower and material resources are saved, the die does not need to be re-opened, the production cost is reduced, a local design structure is slightly increased on the basis of the traditional design, the rotary order noise is reduced, and the customer requirements are met.
Preferably, the air guide vanes comprise first air guide vanes, each first air guide vane is a first minor arc section, the cross section of each first minor arc section along the vertical direction is of an inverted J-shaped structure, the wall thickness of a straight plate at the lower end of each inverted J-shaped structure is the same as that of the air guide ring, the bent part of each J-shaped structure faces one side of the circle center of the air guide ring, and one side of the middle part of each J-shaped structure, which is close to the circle center of the air guide ring, is an arc transition surface; the tail end of the hook part of the J-shaped structure is provided with a fillet.
According to the utility model, the first fan guide blade with the inverted J-shaped structure is adopted, and the noise of a local position point is reduced sequentially through the straight plate at the lower end of the inverted J-shaped structure, the arc transition surface and the fillet, so that the rotary order noise is reduced.
Drawings
Fig. 1 is a schematic structural view of a wind deflector of the prior art.
Fig. 2 is a schematic view of an installation structure of the first wind guide blade and the second wind guide blade of the present invention.
Fig. 3 is a three-dimensional view of a first wind guide blade according to the present invention.
Fig. 4 is a three-dimensional view of a second wind guide blade according to the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
A method for arranging an air guide ring structure beneficial to reducing the rotation order noise comprises the following steps:
1) a plurality of open grooves which are uniformly distributed around the circumference and have upward openings are arranged on the air guide ring 5 at the air outlet of the fan cover, and the open grooves are positioned between the adjacent reinforcing ribs;
2) analyzing the specific position, angle and height of the wind guide blade to be added on the wind guide ring 5 according to the blade profile designed by the existing fan blade and by combining the flow field analysis and the sound field distribution of the noise test;
3) the wind guide blade structure comprises a first wind guide blade 3 and a second wind guide blade 4, wherein the first wind guide blade 3 and the second wind guide blade 4 are singly or more combined according to computer simulation design, and the specific positions of the first wind guide blade 3 and the second wind guide blade 4 on the wind guide ring 5 are determined;
4) adding corresponding inserts on the basis of the existing die to produce the guide vanes;
5) after the air guide ring structure is installed, the physical verification is carried out, after the air guide ring structure is improved, the total sound pressure level is reduced by 0.3dB under the steady-state working condition of 86% duty ratio (2490rpm), the optimization is not large, but the optimization of the rotation order noise is obvious, and is reduced by about 6.5 dB. In the speed-raising noise result, the total sound pressure level is basically overlapped with the original design, the optimization is not obvious, but the main-order noise is obviously optimized in the whole rotating speed interval, and the difference value is obviously optimized, and can reach more than 10dB at most. The utility model adds the insert to produce the air guide blade on the basis of the existing die, thereby realizing that the noise optimization can be finished by small change, saving a large amount of time, manpower and material resources, avoiding the need of re-opening the die and reducing the production cost.
Referring to fig. 2, the air guide ring structure is installed at an air cover air outlet, the air cover air outlet includes an air guide ring 5, a plurality of bosses arranged around the circumference are arranged on the air guide ring 5, the upper portion of any one of the bosses is connected with a retaining ring at the center inside the air guide ring 5 through a reinforcing rib, an open slot with an upward opening is arranged on the air guide ring 5 between any two adjacent bosses, and at least one air guide blade is arranged in the open slot; one end and the bottom surface of the air guide blade are connected with the open slot close to the air guide blade into a whole, a first space is reserved between the other end of the air guide blade and the open slot close to the air guide blade, the arc length of the first space is calculated according to the fluid noise, and the fluid noise passes through the physical verification. The air guide ring is provided with the plurality of open slots, the air guide ring does not need to be redesigned according to the size matched with the system design and the blade profile of the fan, the air inlet structure and the air outlet structure of the fan do not need to be redesigned, and the specific position, angle and height of the air guide blade needing to be added on the air guide ring are analyzed according to the blade profile of the existing fan only by combining the flow field analysis and the sound field distribution of the noise test, so that the application range is wide; on the basis of the traditional design, a local design structure is slightly added, the rotation order noise is reduced, and the requirement of a client is met.
In the second embodiment, on the basis of the first embodiment, the open slot is a U-shaped open slot, and first round corners are arranged between the bottom edge of the U-shaped open slot and the vertical edges at two sides of the U-shaped open slot; the bottom of one end of the guide vane is provided with a second round angle, the size of the second round angle is the same as that of the first round angle, the vertical edge and the bottom edge of the guide vane, which are adjacent to the second round angle, are connected with the U-shaped open slot at the contact part of the vertical edge and the bottom edge, which are connected with the guide vane into a whole, and the first space is positioned between the other end of the guide vane and the U-shaped open slot close to the guide vane. One end of the air guide blade is connected with the U-shaped open slot into a whole, so that noise is reduced; through first fillet and the cooperation of second fillet, increased the area of contact end, increased local rigidity, promoted the bulk strength of wind-guiding circle.
In a third embodiment, on the basis of the second embodiment, referring to fig. 3, the wind guide vane includes a first wind guide vane 3, the first wind guide vane 3 is a first minor arc section, and a cross section of the first minor arc section along a vertical direction is an inverted J-shaped structure, wherein a straight plate at a lower end of the inverted J-shaped structure is the same as a wall thickness of the wind guide ring 5, a bent portion of the J-shaped structure faces one side of a circle center of the wind guide ring 5, one side of a middle portion of the J-shaped structure, which is close to the circle center of the wind guide ring 5, is an arc transition surface, and a radius of the arc transition surface is C; the tail end of the hook part of the J-shaped structure is provided with a fillet, and the radius of the fillet is B. According to the utility model, the first fan guide blade with the inverted J-shaped structure is adopted, and the noise of a local position point is reduced sequentially through the straight plate at the lower end of the inverted J-shaped structure, the arc transition surface and the fillet, so that the rotary order noise is reduced.
And on the basis of the third embodiment, an air guide surface is further arranged between the arc transition surface and the joint of the bending part of the J-shaped structure, and an included angle A between the air guide surface and the vertical surface is an acute angle. The utility model further solves the problem of uniformity of noise distribution by adopting the air guide surface, and reduces local position point noise through the straight plate at the lower end of the inverted J-shaped structure, the arc transition surface, the air guide surface and the fillet in sequence, thereby reducing the rotation order noise.
In a fifth embodiment, on the basis of the fourth embodiment, an included angle a between the wind guide surface and the vertical surface is 45 degrees, and a radius B of a rounded corner at the tail end of the hook part of the J-shaped structure is 2 mm; the radius C of the arc transition surface is 15 mm.
In a sixth embodiment, on the basis of the second embodiment, referring to fig. 2 and fig. 4, the wind guide vane further includes a second wind guide vane 4, the second wind guide vane 4 is a second minor arc section, the wall thickness of the second minor arc section is the same as that of the wind guide ring 5, and the cross section of the second minor arc section along the vertical direction is a vertically arranged rectangle. And a third fillet corresponding to the contact end of the U-shaped open slot is arranged below one end of the second wind guide blade 4, the third fillet has the same size as the first fillet, and the vertical edge and the bottom edge of the second wind guide blade 4, which are adjacent to the third fillet, are connected with the U-shaped open slot at the contact position of the vertical edge and the bottom edge. A fourth fillet is arranged above the other end of the second air guide blade 4, and the first space is positioned between the other end of the second air guide blade 4 and the U-shaped open slot close to the first space; the space between the fourth fillet and the U-shaped open slot close to the fourth fillet is a second space which is communicated with the first space. One end of the second wind guide blade is connected with the U-shaped open slot into a whole, so that the noise is reduced; through the cooperation of first fillet and third fillet, increased the area of contact end, increased local rigidity, promoted the bulk strength of wind-guiding circle.
During specific implementation, the corresponding local air ring structure is matched at the air outlet of the fan cover according to different fan blade types. The angle and the height range are adjusted according to the blade profile so as to meet the requirements of actually measuring the order noise of the single body and the NVH (noise, vibration and harshness) of the whole vehicle.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (7)
1. Do benefit to wind-guiding circle structure that reduces rotatory order noise, install at the fan housing air outlet, its characterized in that: the air outlet of the fan cover comprises an air guide ring (5), a plurality of bosses which are arranged around the circumference are arranged on the air guide ring (5), the upper part of any boss is connected with a retaining ring at the center inside the air guide ring (5) through a reinforcing rib, an open slot with an upward opening is arranged on the air guide ring (5) between any two adjacent bosses, and at least one air guide blade is arranged in the open slot; one end and the bottom surface of the air guide blade are connected with the open slot close to the air guide blade into a whole, and a first space is reserved between the other end of the air guide blade and the open slot close to the air guide blade.
2. The wind guide ring structure beneficial to reducing the rotation order noise as set forth in claim 1, wherein: the opening groove is a U-shaped opening groove, and first round corners are arranged between the bottom edge of the U-shaped opening groove and the vertical edges at the two sides of the U-shaped opening groove; the bottom of one end of the guide blade is provided with a second round angle, the size of the second round angle is the same as that of the first round angle, the vertical edge and the bottom edge of the guide blade, which are adjacent to the second round angle, are connected with the U-shaped open slot at the contact position of the vertical edge and the bottom edge, which are adjacent to the second round angle, are connected into a whole, and the first space is positioned between the other end of the guide blade and the U-shaped open slot close to the guide blade.
3. The wind guide ring structure facilitating reduction of rotational order noise according to claim 2, wherein: the air guide vane comprises a first air guide vane (3), the first air guide vane (3) is a first minor arc section, the cross section of the first minor arc section along the vertical direction is of an inverted J-shaped structure, the wall thickness of a straight plate at the lower end of the inverted J-shaped structure is the same as that of the air guide ring (5), the bending part of the J-shaped structure faces one side of the circle center of the air guide ring (5), and one side of the middle part of the J-shaped structure, which is close to the circle center of the air guide ring (5), is an arc transition surface; the tail end of the hook part of the J-shaped structure is provided with a fillet.
4. The wind guide ring structure facilitating reduction of rotational order noise according to claim 3, wherein: and an air guide surface is further arranged between the arc transition surface and the joint of the bending part of the J-shaped structure, and an included angle A between the air guide surface and the vertical surface is an acute angle.
5. The wind guide ring structure facilitating reduction of rotational order noise according to claim 2, wherein: the air guide vane further comprises a second air guide vane (4), the second air guide vane (4) is a second minor arc section, the wall thickness of the second minor arc section is the same as that of the air guide ring (5), and the cross section of the second minor arc section in the vertical direction is a vertically arranged rectangle.
6. The wind guide ring structure facilitating reduction of rotational order noise according to claim 5, wherein: and a third fillet corresponding to the contact end of the U-shaped open slot is arranged below one end of the second air guide blade (4), the third fillet has the same size as the first fillet, and the vertical edge and the bottom edge of the second air guide blade (4) adjacent to the third fillet are connected with the U-shaped open slot at the contact position of the vertical edge and the bottom edge of the second air guide blade are connected into a whole.
7. The wind guide ring structure facilitating reduction of rotational order noise according to claim 5, wherein: a fourth fillet is arranged above the other end of the second fan blade (4), and the first space is positioned between the other end of the second fan blade (4) and the U-shaped open slot close to the first space; the space between the fourth fillet and the U-shaped open slot close to the fourth fillet is a second space which is communicated with the first space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123039010.0U CN217002407U (en) | 2021-12-06 | 2021-12-06 | Wind guide ring structure beneficial to reducing noise of rotation order |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123039010.0U CN217002407U (en) | 2021-12-06 | 2021-12-06 | Wind guide ring structure beneficial to reducing noise of rotation order |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002407U true CN217002407U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123039010.0U Active CN217002407U (en) | 2021-12-06 | 2021-12-06 | Wind guide ring structure beneficial to reducing noise of rotation order |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002407U (en) |
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2021
- 2021-12-06 CN CN202123039010.0U patent/CN217002407U/en active Active
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