CN115899822A - Diversion structure and courtyard machine with same - Google Patents
Diversion structure and courtyard machine with same Download PDFInfo
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- CN115899822A CN115899822A CN202211502493.XA CN202211502493A CN115899822A CN 115899822 A CN115899822 A CN 115899822A CN 202211502493 A CN202211502493 A CN 202211502493A CN 115899822 A CN115899822 A CN 115899822A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention provides a flow guide structure and a courtyard machine with the same, comprising: the guide ring is provided with a first side surface and a second side surface which are oppositely arranged, and the first side surface is a guide surface for guiding the airflow; the flow guide ribs are arranged at the second side face, at least part of the flow guide ribs and the axial direction of the flow guide ring are obliquely arranged at a first preset angle, the number of the flow guide ribs is multiple, and the plurality of the flow guide ribs are arranged around the periphery of the second side face. Through the technical scheme provided by the invention, the technical problem of high noise of the fan blade in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a flow guide structure and a courtyard machine with the same.
Background
At present, the courtyard machine is widely applied to a plurality of shells such as unit machines, outlet unit machines and multi-split air conditioners, is long in air supply distance, attractive in appearance and free of occupying space, is favored by more and more consumers, and is huge in market demand.
However, in the prior art, a gap is formed between the guide ring and the front cover of the fan blade, gas can flow back from the gap, and waste can be caused when airflow returns from a high-pressure side to a low-pressure side, so that pressure loss can be caused by gap flow, working noise can be increased, and the efficiency of a fan system is reduced.
Disclosure of Invention
The invention mainly aims to provide a flow guide structure and a courtyard machine with the same, and aims to solve the technical problem of high noise of wind blades in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a flow guide structure including:
the guide ring is provided with a first side surface and a second side surface which are oppositely arranged, and the first side surface is a guide surface for guiding the airflow;
the flow guide ribs are arranged at the second side face, at least part of the flow guide ribs and the axial direction of the flow guide ring are obliquely arranged at a first preset angle, the number of the flow guide ribs is multiple, and the plurality of the flow guide ribs are arranged around the periphery of the second side face.
Furthermore, the flow guide structure is used for guiding airflow at the fan blade, at least part of the fan blade is arranged opposite to the flow guide ring, and the inclined extension direction of the first preset angle is opposite to the rotation direction of the fan blade.
Further, the guide rib includes:
the first flow guide part and the second flow guide part are connected with each other, and the first flow guide part and the axial direction of the flow guide ring are obliquely arranged at a first preset angle; the second water conservancy diversion portion sets up in the one side that the water conservancy diversion circle was kept away from to first water conservancy diversion portion, and first water conservancy diversion portion is the setting of second preset angle with second water conservancy diversion portion.
Further, the first preset angle is theta, and theta is larger than 0 degree and smaller than or equal to 30 degrees.
Furthermore, a plurality of flow guide ribs surround the periphery of the flow guide ring to form a circular ring structure, and the central angle corresponding to the end parts of the flow guide ribs is alpha; a plurality of flow guide ribs are uniformly distributed on the periphery of the flow guide rings to form a circular ring structure, and the central angle corresponding to the circular arc between every two adjacent flow guide rings is beta; wherein, the first and the second end of the pipe are connected with each other,
alpha is more than or equal to 1 degree and less than or equal to 4 degrees; and/or the presence of a gas in the atmosphere,
1°≤β≤8°。
further, the flow guide structure further comprises:
the annular mounting plate is connected with the flow guide ring and arranged at the end part of the flow guide ring; the water conservancy diversion fin is installed on annular mounting panel.
Furthermore, the end parts of the plurality of flow guide ribs close to the outlet of the flow guide ring form a first circular surface with a corresponding radius R q1 The radius of the outlet of the guide ring is R d1 (ii) a The end parts of the plurality of flow guide ribs close to the inlets of the flow guide rings form a second circular surface with the corresponding radius of R q2 The radius of the inlet of the guide ring is R d2 (ii) a Wherein, the first and the second end of the pipe are connected with each other,
1＜R q1 /R d1 less than 1.05; and/or the presence of a gas in the gas,
1＜R q2 /R d2 ＜1.05。
further, the axial height of the guide ring is h d The axial height of the flow guide rib is h, and the length of the flow guide ring extending into the front cover of the fan blade is h f The axial height of the diversion outlet section of the diversion ring is b; the thickness of the flow guiding rib is P 3 The outlet of the guide ring extends into the front cover of the fan blade, and the clearance between the outlet of the guide ring and the front cover of the fan blade is L d (ii) a Wherein the content of the first and second substances,
h d -b＜h＜h d -h f (ii) a And/or the presence of a gas in the gas,
0.9L d ＜P 3 ＜1.1L d 。
furthermore, the flow guide ring comprises a flow guide inlet section, a flow guide throat section and a flow guide outlet section which are sequentially connected, the flow guide throat section is of an arc transition structure, and two ends of the flow guide throat section are respectively tangent to the flow guide inlet section and the flow guide outlet section; the axial height of the guide ring is h d Shaft of the inducerThe axial height of the diversion outlet section is a, and the axial height of the diversion outlet section is b; the diversion outlet section extends into the front cover of the fan blade, and the radius of the front cover of the fan blade is R g The clearance between the outlet of the guide ring and the front cover of the fan blade is L d ；
0.2＜b/h d Less than 0.5; and/or the presence of a gas in the gas,
0＜a/h d less than 0.4; and/or the presence of a gas in the gas,
0.015＜L d /R g ＜0.025。
according to another aspect of the present invention, there is provided a raise boring machine comprising:
a fan blade;
the air outlet component is characterized in that at least part of the fan blade is arranged opposite to the flow guide ring.
By applying the technical scheme of the invention, the first side surface and the second side surface are arranged on the guide ring, the guide ribs are arranged around the second side surface, and the guide ribs and the guide ring are arranged at preset angles, so that the leakage flow between the guide ring and the fan blade is reduced, the vortex of the leakage flow is eliminated, the leakage flow flows in one direction, the gas backflow can be reduced, the noise of the fan blade is reduced, and the system efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a flow guide structure according to a first embodiment of the present invention;
fig. 2 shows a schematic view of one direction of a flow guiding structure according to a first embodiment of the invention;
FIG. 3 shows a partial enlarged view at A according to a first embodiment of the invention;
FIG. 4 is a schematic view of a first embodiment of an air guide rib according to the present invention;
FIG. 5 shows a top view of a guide rib according to a first embodiment of the invention;
FIG. 6 is a schematic structural diagram illustrating a configuration of a guide ring and a fan blade according to a first embodiment of the invention;
FIG. 7 shows a close-up view at B according to a first embodiment of the present invention;
fig. 8 is a partial dimensional view of a deflector ring and deflector ribs according to a first embodiment of the invention;
FIG. 9 is a cross-sectional view of a deflector ring and a fan blade according to a first embodiment of the invention;
fig. 10 is a schematic structural view of a guide rib according to a first embodiment of the present invention;
FIG. 11 is a graph comparing a pod and prior art noise values according to a first embodiment of the present invention;
fig. 12 is a graph showing a comparison of input power of a motor of a flow guide structure according to a first embodiment of the present invention and a motor of a flow guide structure in the prior art.
Wherein the figures include the following reference numerals:
10. a flow guide ring; 11. a first side surface; 12. a second side surface; 13. an annular mounting plate;
20. flow guiding ribs; 21. a first flow guide part; 22. a second flow guide part;
30. a fan blade.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 to 10, in an embodiment of the present invention, a flow guiding structure is provided, including: a guide ring 10 and guide ribs 20. The deflector ring 10 has a first side 11 and a second side 12 which are oppositely disposed, and the first side 11 is a guide surface for guiding the airflow. The guide fins 20 are arranged at the second side surface 12, at least part of the guide fins 20 and the axial direction of the guide ring 10 are obliquely arranged at a first preset angle, the guide fins 20 are arranged in a plurality, and the plurality of guide fins 20 are arranged around the periphery of the second side surface 12.
By adopting the arrangement, the guide ribs 20 are arranged around the second side surface 12 of the guide ring 10, and the guide ribs 20 and the guide ring 10 are arranged at a preset angle, so that leakage flow between the guide ring 10 and the fan blade 30 can be reduced, vortex of the leakage flow is eliminated, the leakage flow flows in one direction, gas backflow can be reduced, the noise of the fan blade 30 is reduced, and the system efficiency is improved.
In this embodiment, the flow guide structure is configured to guide an airflow at the fan blade 30, at least a portion of the fan blade 30 is disposed opposite to the flow guide ring 10, and an inclined extending direction of the first preset angle is opposite to a rotating direction of the fan blade 30. At least part of the guide ribs 20 extend in an inclined direction opposite to the rotation direction of the fan blades 30, so that circumferential movement of airflow is hindered, and the flow space of the airflow is reduced due to the guide ribs 20, so that backflow can be reduced by the guide ribs 20, and the air volume and the efficiency of the fan blades 30 are improved. It should be noted that the inclined extending direction of the first preset angle may be understood as an offset direction along the circumferential direction of the deflector ring 10.
In the present embodiment, the guide rib 20 includes: the first water conservancy diversion portion 21 and the second water conservancy diversion portion 22 of interconnect, the axial of first water conservancy diversion portion 21 and water conservancy diversion circle 10 is the first angle slope setting of predetermineeing, and the second water conservancy diversion portion 22 sets up in the one side that water conservancy diversion circle 10 was kept away from to first water conservancy diversion portion 21, and first water conservancy diversion portion 21 is the second angle setting of predetermineeing with second water conservancy diversion portion 22. By adopting the arrangement, the first flow guide part 21 and the second flow guide part 22 can be conveniently matched with the shape of the flow guide ring 10 better, the backflow blocking effect is effectively achieved, the air flow is conveniently led out to the evaporator better, and meanwhile, the noise caused by vibration is reduced.
Specifically, the first flow guide portion 21 and the second flow guide portion 22 are both strip-shaped structures.
Specifically, the first preset angle is theta, theta is larger than 30 degrees and is smaller than or equal to 60 degrees, so that effective inclination is formed, the circumferential movement of the airflow of the fan blade 30 is obstructed by the guide ribs 20 when the fan blade 30 rotates, and the technical effect of reducing backflow is better achieved.
In this embodiment, the plurality of flow guiding ribs 20 form a circular ring structure around the periphery of the flow guiding ring 10, and a central angle corresponding to an end of each flow guiding rib 20 is α (i.e., a central angle corresponding to an arc length P1 of each flow guiding rib 20), where α is greater than or equal to 1 ° and less than or equal to 4 °. By adopting the arrangement, the backflow airflow can be effectively blocked, the backflow is reduced, and the air quantity is increased.
Specifically, in this embodiment, the plurality of guide ribs 20 are uniformly distributed on the periphery of the guide rings 10 to form a circular ring structure, and a central angle corresponding to a circular arc between two adjacent guide rings 10 is β; beta is more than or equal to 1 degree and less than or equal to 8 degrees. By adopting the structure, the position layout of the guide ribs 20 can be optimized conveniently, so that the effect of reducing backflow is improved better by utilizing the guide ribs 20 better.
Preferably, β in this embodiment is larger than α, and β may be selected to be an integer multiple of the magnitude of α.
In this embodiment, a plurality of flow guiding ribs 20 are uniformly distributed on the periphery of the flow guiding rings 10 to form a circular ring structure, and the corresponding central angle between two adjacent flow guiding rings 10 is β, wherein β is greater than or equal to 1 ° and less than or equal to 8 °. By adopting the arrangement, the guide ribs 20 with the reasonable quantity as much as possible can be arranged at the periphery of the guide ring 10, the backflow airflow can be effectively blocked under the condition of not increasing the processing difficulty, and the system efficiency is increased.
In this embodiment, the flow guiding structure further includes: annular mounting panel 13 is connected with water conservancy diversion circle 10, and annular mounting panel 13 sets up the tip at water conservancy diversion circle 10, and water conservancy diversion fin 20 is installed on annular mounting panel 13. The annular mounting plate 13 is arranged, so that the installation of the flow guide ring 10 and the fan blade 30 can be facilitated, the flow guide ribs 20 can be arranged on the periphery of the flow guide ring 10 conveniently, and a mounting space can be provided for other equipment needing to be installed on the flow guide ring 10 or the fan blade 30.
In this embodiment, the end portions of the plurality of flow guiding ribs 20 close to the outlet of the flow guiding ring 10 enclose a first circular surface, and the radius corresponding to the first circular surface is larger than the radius corresponding to the outlet circular surface corresponding to the outlet of the flow guiding ring 10.
Specifically, the flow guide ring 10 effectively converges the airflow, increases the air inflow, reduces the air inflow resistance, makes the airflow entering the fan blade 30 stable and smooth, and optimizes the pneumatic performance of the air inflow.
In the present embodiment, the end of the plurality of guide ribs 20 near the outlet of the guide ring 10 is surrounded byThe radius corresponding to the first circular surface is R q1 The radius of the outlet of the guide ring 10 is R d1 (ii) a The end parts of the multiple flow guiding ribs 20 close to the inlet of the flow guiding ring 10 enclose a second circular surface with a corresponding radius R q2 The inlet radius of the guide ring 10 is R d2 (ii) a Wherein, R is more than 1 q1 /R d1 Less than 1.05; and/or, 1 < R q2 /R d2 Is less than 1.05. By adopting the structure, the size of the flow guide rib 20 can be conveniently optimized, the flow guide rib 20 can effectively play a role in preventing backflow, and the situation that interference is easy to occur with other parts due to the overlarge size of the flow guide rib 20 can be avoided, so that the structural layout of the flow guide rib 20 is also optimized.
Specifically, the end of the plurality of flow guiding ribs 20 near the outlet of the flow guiding ring 10 encloses a first circular surface with a corresponding radius R q1 Wherein 370mm < R q1 < 390mm. With such an arrangement, by setting R q1 The radius is larger than any radius inside, so that the air flow at the inlet of the fan blade 30 can be increased, the air flow collection is completed before entering the fan blade 30, and the working efficiency of the fan blade 30 is improved.
In the present embodiment, the end of the plurality of guiding ribs 20 near the inlet of the guiding ring 10 forms a second circular surface with a radius R q2 Wherein, R is less than 444mm q2 < 464mm. By such an arrangement, it is possible to facilitate an optimization of the dimensions of the guide rib 20 in order to better achieve the technical effect of preventing backflow.
Specifically, the axial height of the deflector ring 10 in this embodiment is h d The axial height of the guide ribs 20 is h, and the length of the guide ring 10 extending into the front cover of the fan blade 30 is h f The axial height of the diversion outlet section of the diversion ring 10 is b; the thickness of the guide ribs 20 is P 3 The outlet of the guide ring 10 extends into the front cover of the fan blade 30, and the gap between the outlet of the guide ring 10 and the front cover of the fan blade 30 is L d (ii) a Wherein h is d -b＜h＜h d -h f (ii) a And/or, 0.9L d ＜P 3 ＜1.1L d 。
By making h d -b＜h＜h d -h f The guide ribs 20 do not extend into the front cover of the fan blade 30, so that the interference of the guide ribs 20 on the blades of the fan blade 30 is avoided, and the blades of the fan blade 30 can normally run.
By setting the range: 0.9L d ＜P 3 ＜1.1L d The thickness direction of the flow guide rib 20 is arranged corresponding to the gap between the outlet of the flow guide ring 10 and the front cover of the fan blade 30, so that the flow guide rib 20 can effectively block the gap between the outlet of the flow guide ring 10 and the front cover of the fan blade 30, and the technical effect of preventing backflow is better achieved. Preferably, P in the present embodiment 3 ＝L d 。
Specifically, the guide rib 20 in this embodiment may have an equal thickness structure, that is, the guide rib 20 has a thickness P 3 。
In this embodiment, the flow guiding ring 10 includes a flow guiding inlet section, a flow guiding throat section and a flow guiding outlet section which are connected in sequence, the flow guiding throat section is an arc transition structure, and two ends of the flow guiding throat section are respectively tangent to the flow guiding inlet section and the flow guiding outlet section; the axial height of the deflector ring 10 is h d The axial height of the flow guide inlet section is a, the axial height of the flow guide outlet section is b, and the axial height of the flow guide throat section is c; the diversion outlet section extends into the front cover of the fan blade 30, and the radius of the front cover of the fan blade 30 is R g The clearance between the outlet of the guide ring 10 and the front cover of the fan blade 30 is L d . Wherein, b/h is more than 0.2 d Less than 0.5; and/or, 0 < a/h d Less than 0.4; and/or, 0.015 < L d /R g ＜0.025。
By setting the proportion range: b/h is more than 0.2 d Less than 0.5, the axial height of the diversion outlet section can be conveniently in a proper range, so that the wind can be smoothly guided through the diversion outlet section 18.
By setting the proportion range: a/h is more than 0 d The axial height of the diversion inlet section can be conveniently within a proper range so as to facilitate the wind flow collecting effect through the diversion outlet section 18.
By the pair b/h d And a/h d Ruler capable of limiting flow guiding throat sectionThe size range of the guide ring is within a proper range, so that the axial height of the guide throat section is within a proper range, the structure of the guide ring 10 is optimized on the whole, and the guide effect of the guide ring 10 is optimized.
By setting the proportion range of 0.015 to L d /R g Is less than 0.025, the gap between the outlet of the guide ring 10 and the front cover of the fan blade 30 can be in a reasonable range, the interference between structures caused by too small gap can be avoided, and the serious air leakage caused by too large gap can be avoided.
In this embodiment, the flow guiding ring 10 is shown in fig. 1 to 10, wherein the flow guiding ring 10 has a flow guiding outlet section, a flow guiding throat section and a flow guiding inlet section. The annular mounting plate 13 of the guide ring 10 is connected with the shell to fix the guide ring 10, the annular mounting plate 13 is provided with a concave section for mounting an electric appliance box, a throat section is arranged between the inlet collecting section and the outlet section of the guide ring 10 for transition, air enters the guide ring 10 through the collecting section of the guide ring 10, is gathered and then enters the fan blade 30 through the throat section and the outlet section.
The guide ring 10 is arranged on the periphery of the outlet section of the guide ring 10, the guide ribs 20 with the rib structure are uniformly distributed along the circumferential direction and form a certain angle with the vertical direction, and the guide ribs 20 are formed by adding a part of bulges at the periphery of the outlet of the guide ring 10, namely, the outlet section bulges towards the leeward side. An enlarged detail of the guide rib 20 is shown in fig. 2.
In fig. 3, the radius of the outlet of the deflector ring 10 is defined as q, and the value is 370mm; as shown in fig. 10, the radius of the flow guiding rib 20 of the flow guiding ring 10 of the present invention near the outlet is q1 (i.e. R1), q1 e (370, 390) mm, preferably q1=386mm, the radius near the inlet is q2 (i.e. R2), q2 e (444, 464) mm, preferably q2=471mm. The flow guiding rib 20 is angled in the circumferential direction by θ, θ ∈ (0, 90) °, preferably θ =45 °, and the height of the flow guiding rib 20 in the vertical direction is h, h ∈ (0, 38) mm, preferably h =34mm. The diversion fins 20 are evenly distributed along the circumferential direction, the arc length of a single fin is p1, the central angle epsilon [1,4] degree occupied by p1, the preferred central angle epsilon [ 2 ] degree occupied by p1, the arc length between the fins is p2, the central angle epsilon [1,8] degree occupied by p2, and the preferred central angle epsilon [ 4] degree occupied by p 2. The preferred fin structure dimensions are controlled within reasonable limits due to the installation dimensions. The centrifugal fan blade 30 rotates anticlockwise, airflow has anticlockwise circumferential speed, the inclination direction of the ribs is opposite to the rotation direction of the fan blade 30, circumferential movement of the airflow is hindered, and the circulation space of the airflow is reduced due to the ribs, so that backflow can be reduced by the ribs, and the air volume and the efficiency of the fan blade 30 are improved.
The section line of the outlet section of the guide ring 10 is a straight line, the direction is vertical and downward, and the length is h d ，h d E (10,20) mm, preferably h d And =18mm, the section profile of the inlet manifold section is also a straight line, the angle between the section profile and the horizontal plane is beta, beta is (130, 180) °, preferably beta =155 °, the inlet manifold section and the outlet section are connected through an arc transition section, the inlet section profile and the outlet section profile are both tangent, and the radius R of the preferred arc section is 20mm. The preferred inlet collecting section angle, throat radius and outlet section length can effectively converge the air flow, increase the air input, reduce the air inlet resistance, stabilize the air flow entering the fan blade 30 and optimize the pneumatic performance of air inlet.
In the prior art, a gap exists between the guide ring 10 and the centrifugal fan blade 30, air flows back to an inlet from the gap and is mixed with inlet air flow, and the air flow flows from a high-pressure side to a low-pressure side, so that pressure loss is caused, static pressure and efficiency of the fan blade 30 are reduced, noise is increased, and leakage vortex is generated at the position to cause flow passage blockage.
The matching relationship of the guide ring 10 and the fan blade 30 is shown in fig. 6, the fan blade 30 consists of a front cover, a blade and a rear cover, the outlet section of the guide ring 10 extends into the fan blade 30, and the extending length is h f Limited by blades of the centrifugal fan 30 and extending into the blade by a length h f Has a certain range of collision h with the blade otherwise f E (0, 10) mm, preferably h f =8mm, a certain gap L is arranged between the outlet section of the guide ring 10 and the front cover of the centrifugal fan blade 30 d ，L d E (6,10) mm, preferably L d =8mm, the airflow at the outlet of the fan blade 30 flows back through the gap and is mixed with the inlet airflow and then is heavyNew participation in circulation, resulting in flow losses, theoretically clearance L d The smaller the size, the more beneficial the leakage reduction, but due to the actual production precision, and considering the deformation of the fan blade 30 under the conditions of high rotating speed and high and low temperature, the clearance at the position is moderate, and the specific situation is determined according to the materials and the sizes of the fan blade 30 and the flow guide ring 10 which are actually used. The present embodiment selects the gap L d Is at an optimum size to meet the strength requirements described above.
The outlet section of the guide ring 10 is positioned at the outlet of the front cover of the fan blade 30 and the outlet of the fan blade, the flow at the outlet section is complex, and a plurality of guide ribs 20 are established on the peripheral plane of the guide ring 10 matched with the centrifugal fan blade 30 to reduce the leakage flow and eliminate the vortex generated by the leakage flow, so that the leakage flow can flow along the guide ribs 20 to play a role in guiding. The interference between the main flow and the leakage flow can be improved and the turbulent collision of the vane leading edge is attenuated. Therefore, the input power of the motor can be reduced, and the air volume can be increased.
Comparative test data for the deflector ring 10 of the present invention and the deflector ring 10 of the prior art are shown in tables 1, 2 and fig. 11 and 12:
TABLE 1 Current deflector ring test data
Table 2 example bead 10 data
According to test data, the air quantity of the guide ring 10 is increased by about 20m & lt 3 & gt/h compared with the air quantity of the guide ring 10 in the prior art at the same rotating speed; under the same air quantity, the noise value of the guide ring 10 is reduced compared with that of the guide ring 10 in the prior art, and about 0.2dBA is reduced under the high air quantity; under the same air quantity, the input power of the guide ring 10 provided by the embodiment of the invention is reduced by 2-5W compared with that of the guide ring 10 in the prior art. Test data show that the guide ring 10 can effectively increase air quantity, reduce input power, improve the working efficiency of the fan blades 30 and effectively solve the problem of efficiency reduction caused by the leakage of the raise boring machine in the prior art.
The second embodiment of the invention provides a courtyard machine, which comprises fan blades 30 and any one of the diversion structures, wherein at least part of the fan blades 30 is arranged opposite to the diversion ring 10.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the guide ring 10 reduces the gap distance between the front cover of the fan blade 30 and the guide ring 10 by adding the guide ribs 20 at the outlet, reduces the leakage flow, improves the static pressure and efficiency of the fan blade 30, and reduces the noise of the fan. According to the guide ring 10 provided by the invention, the guide ribs 20 are added on the guide ring 10, so that the leakage flow between the guide ring 10 and the wind blades 30 is reduced, the vortex of the leakage flow is eliminated, and the leakage flow flows in one direction. The interference between the main flow and the leakage flow can be improved and the turbulent collision of the leading edge of the blade is weakened.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, so that the scope of the present application is not to be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flow directing construction, comprising:
the air guide ring (10) is provided with a first side surface (11) and a second side surface (12) which are oppositely arranged, and the first side surface (11) is a guide surface for guiding air flow;
the flow guide rib (20) is arranged at the second side face (12), at least part of the flow guide rib (20) and the axial direction of the flow guide ring (10) are obliquely arranged at a first preset angle, the flow guide ribs (20) are multiple, and the flow guide ribs (20) are arranged around the periphery of the second side face (12).
2. The flow guide structure according to claim 1, wherein the flow guide structure is used for guiding airflow at a fan blade (30), at least part of the fan blade (30) is arranged opposite to the flow guide ring (10), and the inclined extension direction of the first preset angle is opposite to the rotation direction of the fan blade (30).
3. Flow directing structure according to claim 1, characterized in that the flow directing rib (20) comprises:
the first flow guide part (21) and the second flow guide part (22) are connected with each other, and the first flow guide part (21) and the axial direction of the flow guide ring (10) are obliquely arranged at the first preset angle; the second flow guide part (22) is arranged on one side, away from the flow guide ring (10), of the first flow guide part (21), and the first flow guide part (21) and the second flow guide part (22) are arranged at a second preset angle.
4. The flow directing structure of claim 1, wherein the first predetermined angle is θ,0 ° < θ ≦ 30 °.
5. The flow guiding structure as recited in claim 1, wherein a plurality of flow guiding ribs (20) form a circular ring structure around the periphery of the flow guiding ring (10), and the central angle corresponding to the end of each flow guiding rib (20) is α; the guide ribs (20) are uniformly distributed on the periphery of the guide rings (10) to form a circular ring structure, and the central angle corresponding to the circular arc between every two adjacent guide rings (10) is beta; wherein the content of the first and second substances,
alpha is more than or equal to 1 degree and less than or equal to 4 degrees; and/or the presence of a gas in the gas,
1°≤β≤8°。
6. the flow directing structure of claim 1, further comprising:
the annular mounting plate (13) is connected with the flow guide ring (10), and the annular mounting plate (13) is arranged at the end part of the flow guide ring (10); the flow guiding ribs (20) are arranged on the annular mounting plate (13).
7. Flow guiding structure according to claim 1, characterized in that the ends of the flow guiding ribs (20) close to the outlet of the flow guiding ring (10) enclose a first circular surface with a radius R q1 The outlet radius of the guide ring (10) is R d1 (ii) a The end parts of the plurality of flow guide ribs (20) close to the inlets of the flow guide ring (10) form a second circular surface with the corresponding radius R q2 The inlet radius of the guide ring (10) is R d2 (ii) a Wherein the content of the first and second substances,
1＜R q1 /R d1 is less than 1.05; and/or the presence of a gas in the atmosphere,
1＜R q2 /R d2 ＜1.05。
8. flow directing structure according to claim 1, characterized in that the flow directing ring (10) has an axial height h d The axial height of the flow guide rib (20) is h, and the flow guide ring (10) extends into the front cover of the fan blade (30)Length of h f The axial height of the diversion outlet section of the diversion ring (10) is b; the thickness of the flow guiding rib (20) is P 3 The outlet of the guide ring (10) extends into the front cover of the fan blade (30), and the gap between the outlet of the guide ring (10) and the front cover of the fan blade (30) is L d (ii) a Wherein, the first and the second end of the pipe are connected with each other,
h d -b＜h＜h d -h f (ii) a And/or the presence of a gas in the gas,
0.9L d ＜P 3 ＜1.1L d 。
9. the flow guiding structure according to claim 1, wherein the flow guiding ring (10) comprises a flow guiding inlet section, a flow guiding throat section and a flow guiding outlet section which are connected in sequence, the flow guiding throat section is of an arc transition structure, and two ends of the flow guiding throat section are tangent to the flow guiding inlet section and the flow guiding outlet section respectively; the axial height of the guide ring (10) is h d The axial height of the flow guide inlet section is a, and the axial height of the flow guide outlet section is b; the diversion outlet section extends into a front cover of the fan blade (30), and the radius of the front cover of the fan blade (30) is R g The clearance between the outlet of the flow guide ring (10) and the front cover of the fan blade (30) is L d ；
0.2＜b/h d Less than 0.5; and/or the presence of a gas in the gas,
0＜a/h d less than 0.4; and/or the presence of a gas in the atmosphere,
0.015＜L d /R g ＜0.025。
10. a raise boring machine, comprising:
a fan blade (30);
the flow guiding structure of any one of claims 1 to 9, wherein at least part of the fan blade (30) is arranged opposite to the flow guiding ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211502493.XA CN115899822A (en) | 2022-11-28 | 2022-11-28 | Diversion structure and courtyard machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211502493.XA CN115899822A (en) | 2022-11-28 | 2022-11-28 | Diversion structure and courtyard machine with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115899822A true CN115899822A (en) | 2023-04-04 |
Family
ID=86477606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211502493.XA Pending CN115899822A (en) | 2022-11-28 | 2022-11-28 | Diversion structure and courtyard machine with same |
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| Country | Link |
|---|---|
| CN (1) | CN115899822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287417A (en) * | 2023-11-27 | 2023-12-26 | 珠海格力电器股份有限公司 | Fan blade assembly and air conditioning unit |
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2022
- 2022-11-28 CN CN202211502493.XA patent/CN115899822A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117287417A (en) * | 2023-11-27 | 2023-12-26 | 珠海格力电器股份有限公司 | Fan blade assembly and air conditioning unit |
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