CN108278221B - Air inlet sealing structure and fan - Google Patents
Air inlet sealing structure and fan Download PDFInfo
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- CN108278221B CN108278221B CN201810383673.8A CN201810383673A CN108278221B CN 108278221 B CN108278221 B CN 108278221B CN 201810383673 A CN201810383673 A CN 201810383673A CN 108278221 B CN108278221 B CN 108278221B
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- air inlet
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- 238000007789 sealing Methods 0.000 title claims abstract description 132
- 241000886569 Cyprogenia stegaria Species 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000002596 correlated effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an air inlet sealing structure and a fan, and belongs to the technical field of fans. The air inlet sealing structure comprises a front disc and a current collector; the front disc is rotatably connected with the current collector, the current collector is of a revolving structure, the current collector and the front disc are coaxially arranged, the fixed end of the current collector is used for being connected with the fan shell, the connecting end of the current collector is close to the front disc relative to the fixed end, first sealing elements distributed circumferentially around the current collector are arranged at the connecting end, the first sealing elements and the current collector form a buffer zone, one end, close to the current collector, of the front disc stretches into the buffer zone, and a first gap is reserved between the first sealing elements and the front disc. The air inlet sealing structure adopts the tooth sealing principle, so that turbulent flow is generated when air flows through the sealing structure to consume the energy of leakage air flow, thereby reducing the internal leakage amount and reducing the influence of the leakage air flow on the flow field of the impeller flow channel. By adopting the fan with the air inlet sealing structure, the air inlet sealing effect is improved, and the running efficiency of the fan is ensured.
Description
Technical Field
The invention relates to the technical field of fans, in particular to an air inlet sealing structure and a fan.
Background
There are many mechanical energy losses during operation of the blower. The relationship between the impeller and the flow rate of the fluid to be delivered can be classified into mechanical loss, volumetric loss and flow loss. The loss of volume is caused by the clearance between the rotating and stationary parts of the fan. When the impeller rotates, a pressure differential is created across the gap, causing a portion of the fluid energized by the impeller to leak from the high pressure side through the gap to the low pressure side.
The general centrifugal fan air inlet seal comprises an air inlet and a front disc, as shown in fig. 1, the air inlet 1 is of a static structure, and the front disc 2 is of a rotary structure. The air flow direction when the centrifugal fan operates is as follows: the air flow enters the impeller flow passage area 5 through the impeller upstream flow passage area 4 and flows to the fan volute flow passage area 3. The pressure of the volute flow passage area 3 of the fan is high, and the pressure of the upstream flow passage area 4 and the impeller flow passage area 5 of the impeller are low. Due to the pressure differential, the air flow will flow from the fan volute flow area 3 to the impeller upstream flow area 4, the impeller flow area 5, referred to as internal leakage. The internal leakage quantity is positively correlated with the gap between the air inlet 1 and the front disc 2, and is positively correlated with the pressure difference between the fan volute flow passage area 3, the impeller upstream flow passage area 4 and the impeller flow passage area 5. The leakage amount of the air inlet sealing structure of the general centrifugal fan is larger, and the influence on the flow field of the impeller flow channel is larger.
Disclosure of Invention
The invention aims to solve the problems, and provides an air inlet sealing structure, which adopts a tooth sealing principle to enable air flow to generate turbulence when flowing through the sealing structure so as to consume the energy of leakage air flow, thereby reducing the internal leakage amount, reducing the influence of the leakage air flow on the flow field of an impeller flow channel and improving the problems.
The invention further aims to provide a fan, and by adopting the air inlet sealing structure, the air inlet sealing effect is improved, and the operation efficiency of the fan is ensured.
The invention is realized in the following way:
the embodiment of the invention provides an air inlet sealing structure which is applied to a centrifugal fan and comprises a front disc and a current collector;
the front plate is rotatably connected with the current collector, the current collector is of a revolving structure, the current collector and the front plate are coaxially arranged, the current collector comprises a fixed end and a connecting end, the fixed end is used for being connected with a fan shell, the connecting end is close to the front plate relative to the fixed end, the connecting end is provided with first sealing elements, the first sealing elements are distributed around the circumference of the current collector, the first sealing elements extend towards the front plate along the axial direction of the current collector, a buffer zone is formed by the first sealing elements and the current collector, one end, close to the current collector, of the front plate stretches into the buffer zone, a first gap is reserved between the first sealing elements and the front plate, and the first sealing elements are used for slowing down airflow flowing through the first gap.
In an alternative embodiment of the invention, the end of the first seal adjacent to the front disc is provided with a bevel, said bevel being located on the inner wall of the first seal.
In an alternative embodiment of the present invention, a second sealing member is disposed at an end of the front disc near the connection end, the second sealing member is located in the buffer zone, the second sealing member is distributed around the circumference of the front disc, the second sealing member extends towards the first sealing member along the radial direction of the front disc, and a second gap is formed between the second sealing member and the first sealing member.
In an alternative embodiment of the invention, the end of the second seal remote from the front disc is provided with a bevel, said bevel being located on the side of the second seal close to the connection end.
In an alternative embodiment of the invention, the connecting end is provided with a third sealing member, the third sealing member is located in the buffer zone, the third sealing member is distributed around the circumference of the current collector, the third sealing member extends towards the front disc along the axial direction of the current collector, and a third gap is formed between the third sealing member and the first sealing member.
In an alternative embodiment of the present invention, the third sealing member includes at least one ring of sealing teeth coaxially disposed with the current collector, the axial direction of the current collector is a preset direction, and the length of the sealing teeth in the preset direction is smaller than the length of the first sealing member in the preset direction.
In an alternative embodiment of the invention, the number of seal teeth is two, the two seal teeth being spaced apart along the radial direction of the current collector.
In an alternative embodiment of the invention, the end of the sealing tooth remote from the connecting end is provided with a bevel, which bevel is located on the side of the sealing tooth remote from the first seal.
In an alternative embodiment of the invention, the seal tooth has a thickness less than the thickness of the first seal member.
The embodiment of the invention also provides a fan, which comprises an air inlet box and the air inlet sealing structure, wherein the air inlet box is connected with the current collector.
Compared with the prior art, the invention has the beneficial effects that:
the air inlet sealing structure adopts the tooth sealing principle, so that turbulent flow is generated when air flows through the sealing structure to consume the energy of leakage air flow, thereby reducing the internal leakage amount and reducing the influence of the leakage air flow on the flow field of the impeller flow channel.
By adopting the fan with the air inlet sealing structure, the air inlet sealing effect is improved, and the running efficiency of the fan is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art seal structure;
FIG. 2 is a schematic view of an intake seal structure according to a first embodiment of the present invention;
FIG. 3 is a schematic view of another view of the air intake seal structure according to the first embodiment of the present invention;
FIG. 4 is an enlarged schematic view of FIG. 3 at A;
FIG. 5 is a schematic view of the structure of the inclined plane;
FIG. 6 is a schematic flow direction of a leakage gas flow;
FIG. 7 is a schematic view of a single stage tooth seal;
FIG. 8 is a schematic view of a two-stage tooth seal;
fig. 9 is a schematic view of another construction of the secondary seal.
Icon: 100-an air inlet sealing structure; 1-an air inlet; 2-front tray; 21-leaf; 22-a rear tray; 3-a volute flowpath area; 4-an impeller upstream flow passage region; 5-impeller flow passage area; 6-current collector; 61-a fixed end; 62-connecting ends; 7-a first seal; 71-a first gap; 8-a second seal; 81-a second gap; 9-a third seal; 91-seal teeth; 92-a third gap; 93-fourth gap; 101-a buffer; 102-inclined plane.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
First embodiment
Referring to fig. 2, the present embodiment provides an air inlet sealing structure 100, which is applied to a centrifugal fan and includes a front plate 2 and a current collector 6.
In the centrifugal fan, an impeller is in transmission connection with a motor shaft, the impeller is of a rotary structure and comprises a plurality of blades 21, a front disc 2 and a rear disc 22 which are fixed on two sides of the blades 21, and the front disc 2 is rotatably connected with a current collector 6; the current collector 6 is a solid of revolution structure, the current collector 6 (similar to the air inlet 1 in the prior art) comprises a fixed end 61 and a connecting end 62, the fixed end 61 is used for being connected with an air inlet box (when the centrifugal machine is not provided with the air inlet box, the fixed end 61 is connected with a fan shell), the connecting end 62 is close to the front disc 2 relative to the fixed end 61, the connecting end 62 is provided with a first sealing element 7 and a third sealing element 9, a buffer zone 101 is formed between the first sealing element 7 and the connecting end 62, the end of the front disc 2 stretches into the buffer zone 101, a first gap 71 is formed between the first sealing element 7 and the front disc 2, the first sealing element 7 and the front disc 2 form a first-stage tooth seal, one end of the front disc 2 close to the connecting end 62 is provided with a second sealing element 8, the second sealing element 8 extends along the axial direction of the impeller, the second sealing element 8 is positioned in the buffer zone 101, a second gap 81 is formed between the second sealing element 8 and the first sealing element 7, a third gap 9 is positioned in the buffer zone 101, a third gap 9 is positioned between the third sealing element 9 and the third sealing element 9 is positioned in the first gap 92, and the third gap 9 is positioned between the connecting end 62 and the third sealing element 9 is provided between the third gap 9 and the third sealing element 9. The intake seal structure 100 employs a tooth seal principle to enable air flow to rotate between individual seals, generate turbulence to consume energy of leakage air flow step by step, enable kinetic energy of leakage air flow to be reduced, and speed to be reduced, so that internal leakage amount is reduced, and meanwhile, the influence of leakage air flow on an impeller runner flow field is reduced. A user can select different types of sealing elements according to actual conditions, different grades of tooth sealing are realized, and the use requirement is met.
The specific structure of each component of the intake seal structure 100 and the positional relationship with each other are described in detail below.
According to the structure of the centrifugal fan, the impeller is a rotating part, and for convenience of description, as shown in fig. 3, the impeller is used for driving connection with a motor shaft, and the impeller comprises a plurality of blades 21, and a front disc 2 and a rear disc 22 fixed at both sides of the blades 21, wherein the blades 21, the front disc 2 and the rear disc 22 form an impeller runner area 5. The front plate 2 is rotatably connected with a collector 6 (commonly called an air inlet), the collector 6 is in a revolving structure, the collector 6 is coaxially arranged with the front plate 2, the collector 6 is connected with an air inlet box, and the collector 6 is in a static state when the centrifugal fan operates.
It should be noted that, since the front disc 2 is a rotating structure, the front disc 2 has a circumferential direction, an axial direction, and a radial direction, which refer to a direction in which the front disc 2 rotates, an axial direction of a rotation shaft of the front disc 2, and a direction perpendicular to an axis of the rotation shaft of the front disc 2, respectively. The lower collector 6 is similar to the front plate 2 in circumferential, circumferential and radial directions.
As shown in fig. 3, the current collector 6 includes a fixed end 61 and a connecting end 62, the fixed end 61 being for connection with an air intake box (in this embodiment, the centrifugal fan has an air intake box, the fixed end 61 is connected with the air intake box; when the centrifugal fan does not have an air intake box, the fixed end 61 is connected with the fan housing), so that the gas in the air intake box enters the current collector 6; the connecting end 62 is close to the front plate 2 relative to the fixed end 61, the end of the connecting end 62 has a certain thickness, as shown in fig. 4 and 7, the connecting end 62 is provided with a first sealing member 7, the first sealing member 7 is distributed around the circumference of the current collector 6, the first sealing member 7 extends towards the front plate 2 along the axial direction of the current collector 6, the first sealing member 7 is flush with the outer surface of the connecting end 62, the thickness of the first sealing member 7 is smaller than that of the connecting end 62, the first sealing member 7 and the current collector 6 (the connecting end 62) form a buffer zone 101, the end of the front plate 2 close to the current collector 6 extends into the buffer zone 101, a gap is formed between the front plate 2 and the connecting end 62, a first gap 71 is formed between the first sealing member 7 and the front plate 2, and the first sealing member 7 is used for slowing down the air flow flowing through the first gap 71.
It is to be noted that the thickness mentioned in this embodiment refers to a dimension in the radial direction (a direction perpendicular to the axis of the rotary shaft).
The first sealing member 7 is in a cylindrical structure, and the first sealing member 7 is connected with the connecting end 62, so that the first sealing member 7 forms a first-stage tooth seal with the front disc 2, and after the air flow in the volute flow channel area 3 enters the buffer area 101 through the first gap 71, turbulence is generated, so that the energy of the leaked air flow is consumed, and the internal leakage amount is reduced (as shown in fig. 6). In order to improve the connection strength of the first sealing member 7 and the connection end 62, the first sealing member 7 is integrally formed with the connection end 62. As shown in fig. 7, a schematic view of an intake seal structure 100 having a first seal 7 is shown.
Further, in order to enhance the effect of the throttling effect, as shown in fig. 5, the end of the first sealing member 7 near the front plate 2 is provided with a slope 102, the slope 102 being located on the inner wall of the first sealing member 7, that is, the slope 102 being located on the inner surface of the first sealing member 7, and extending from the end of the first sealing member 7 near the front plate 2 toward the connection end 62 in the axial direction of the current collector 6. The thickness of the first seal 7 increases gradually from the end near the front plate 2 toward the connection end 62 in the axial direction of the current collector 6.
In order to reduce the influence of the leakage air flow on the impeller flow field, as shown in fig. 4 and 8, a second sealing member 8 is arranged at one end of the front disc 2, which is close to the connecting end 62, the second sealing member 8 is located in a buffer zone 101, the second sealing member 8 is distributed around the circumference of the front disc 2, the second sealing member 8 extends towards the first sealing member 7 along the radial direction of the front disc 2, a second gap 81 is arranged between the second sealing member 8 and the first sealing member 7, and the leakage air flows through the first gap 71 and then flows through the second gap 81 to enter the impeller flow field. The second seal 8 forms an angular space with the front plate 2 and acts as a barrier to the air flow, so that the air flow flowing through the first gap 71 must flow through the second gap 81, reducing the flow rate of the air flow, and at the same time, causing turbulence of the air flow after passing through the second gap 81. The second sealing element 8 and the first sealing element 7 form a second-stage tooth seal, as shown in fig. 8, the second-stage tooth seal is matched with the first-stage tooth seal for use, leakage air flow passes through the first-stage tooth seal and the second-stage tooth seal to form two turbulent flows, and the energy of the leakage air flow is consumed step by step, so that the kinetic energy of the leakage air flow is reduced, the speed is reduced, and the leakage amount is reduced.
In order to improve the connection strength of the second seal 8 with the front plate 2, the second seal 8 is integrally formed with the front plate 2.
It is noted that in order to ensure the energy consumption of the leakage air flow, the thickness of the second seal 8 is as small as possible, and the thickness of the second seal 8 may be smaller than the thickness of the first seal 7. Because the first seal 7 is subjected to a greater flow rate of the air flow, the thickness of the first seal 7 may be chosen to be greater than the thickness of the second seal 8.
Further, in order to enhance the effect of the throttling effect, as shown in fig. 5, an end of the second sealing member 8 away from the front plate 2 is provided with a slope 102, the slope 102 is located on a side (a side away from the blade 21) of the second sealing member 8 close to the connection end 62, the slope 102 extends from an end of the second sealing member 8 away from the front plate 2 toward the front plate 2, and the provision of the slope 102 reduces the thickness of the second sealing member 8 and enhances the effect of the throttling effect of the second sealing member 8. Equivalently, the thickness of the second seal member 8 gradually increases from one end near the first seal member 7 toward the front disc 2 in the radial direction of the front disc 2.
As shown in fig. 4 and 9, the connection end 62 is provided with a third seal 9, the third seal 9 being located in the buffer zone 101, the third seal 9 being distributed around the circumference of the current collector 6, the third seal 9 extending in the axial direction of the current collector 6 towards the front disc 2, a third gap 92 being provided between the third seal 9 and the first seal 7.
The third sealing member 9 includes at least one ring of sealing teeth 91 coaxially disposed with the current collector 6, the axial direction of the current collector 6 is a preset direction, and the length of the sealing teeth 91 in the preset direction is smaller than the length of the first sealing member 7 in the preset direction. When the intake seal structure 100 is provided with the second seal 8, there is a fourth gap 93 between the seal teeth 91 (third seal 9) and the second seal 8 in the axial direction of the current collector 6, and the leakage air flow passes through the second seal 8, then enters the third gap 92, and enters the impeller flow passage region 5 through the fourth gap 93. The third seal 9 is arranged such that the leakage air flow after passing the third seal 9 forms a turbulent flow to consume the energy of the leakage air flow, thereby reducing the amount of internal leakage.
As an alternative to this embodiment, the number of seal teeth 91 is two, the two seal teeth 91 being spaced apart in the radial direction of the current collector 6. The two turns of seal teeth 91 cause the air flow to generate two turbulences when passing through the third seal 9, the two times consuming the energy of the leakage air flow, reducing the amount of internal leakage.
Further, as shown in fig. 5, the end of the seal tooth 91 away from the connection end 62 is provided with a slope 102, and the slope 102 is located on the side of the seal tooth 91 away from the first seal member 7, which corresponds to the thickness of the seal tooth 91 gradually increasing from the end near the front plate 2 toward the connection end 62 in the axial direction of the current collector 6. The provision of the inclined surface 102 of the seal tooth 91 improves the effect of the throttling effect of the seal tooth 91 and reduces the amount of internal leakage.
In order to improve the connection strength between the seal tooth 91 and the connection end 62, the seal tooth 91 is integrally formed with the connection end 62.
Further, the thickness of the seal tooth 91 is smaller than that of the first seal member 7, the seal tooth 91 is located in the buffer area 101, and when the thickness of the seal tooth 91 is smaller, the throttling effect of the third seal member 9 can be improved, so that the internal leakage amount is reduced, the leakage air flow entering the impeller flow passage area 5 is reduced, and the influence of the leakage air flow on the impeller flow passage flow field is reduced. Fig. 9 shows a schematic structural diagram of the first seal 7 and the third seal 9, in which case the second seal 8 is not designed and a two-stage tooth seal is used.
The working principle of the embodiment of the invention is as follows:
as shown in fig. 6, along the inner leakage direction, the first sealing element 7 forms a first-stage tooth seal with the front disc 2, the second sealing element 8 forms a second-stage tooth seal with the first sealing element 7, the third sealing element 9 forms a third-stage tooth seal with the second sealing element 8, and the tooth seal principle is adopted to enable air flow to rotate between the sealing elements, so that turbulence is generated to gradually consume the energy of the leakage air flow, the kinetic energy of the leakage air flow is reduced, and the speed is reduced, so that the inner leakage amount is reduced; meanwhile, the influence of leakage air flow on the flow field of the impeller flow channel is reduced due to the reduction of internal leakage.
It should be noted that, according to the actual use situation, the user may adopt a single tooth seal structure, i.e. a single tooth seal (only one seal member, as shown in fig. 7), or may adopt a multi-stage tooth seal (two or three seal members, as shown in fig. 8/9, which are two-stage seal members, and fig. 4, which are three-stage seal members), so as to implement different air inlet seals, thereby meeting different use requirements.
Second embodiment
The present embodiment provides a blower including an air inlet box and the air inlet seal arrangement 100 provided in the first embodiment.
In this embodiment, the inlet box is connected to a collector 6, and gas can enter the impeller flow passage region 5 through the inlet box and collector 6. The fan adopting the air inlet sealing structure 100 reduces the internal leakage quantity, reduces the influence on the flow field of the impeller flow channel, improves the working efficiency of the fan and reduces the energy consumption.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An air inlet sealing structure is applied to a centrifugal fan and is characterized by comprising a front disc and a current collector;
the front plate is rotatably connected with the current collector, the current collector is of a revolving body structure, the current collector and the front plate are coaxially arranged, the current collector comprises a fixed end and a connecting end, the fixed end is used for being connected with a fan shell, the connecting end is close to the front plate relative to the fixed end, the connecting end is provided with first sealing pieces, the first sealing pieces are distributed around the circumference of the current collector, the first sealing pieces extend towards the front plate along the axial direction of the current collector, a buffer area is formed by the first sealing pieces and the current collector, one end, close to the current collector, of the front plate stretches into the buffer area, a first gap is reserved between the first sealing pieces and the front plate, and the first sealing pieces are used for slowing down air flow flowing through the first gap;
an inclined surface is arranged at the end part, close to the front disc, of the first sealing element, and the inclined surface is positioned on the inner wall of the first sealing element;
a second sealing element is arranged at one end of the front disc, which is close to the connecting end, and is positioned in the buffer zone, the second sealing elements are distributed around the circumference of the front disc, extend towards the first sealing element along the radial direction of the front disc, and a second gap is formed between the second sealing element and the first sealing element;
the connecting end is provided with a third sealing element, the third sealing element is located in the buffer zone, the third sealing element is distributed around the circumference of the current collector, the third sealing element extends towards the front disc along the axial direction of the current collector, and a third gap is formed between the third sealing element and the first sealing element.
2. The intake seal structure according to claim 1, wherein an end of the second seal member remote from the front plate is provided with a slope, the slope being located on a side of the second seal member near the connection end.
3. The intake seal structure according to claim 1, wherein the third seal member includes at least one ring of seal teeth coaxially provided with the current collector, an axial direction of the current collector being a preset direction, a length of the seal teeth in the preset direction being smaller than a length of the first seal member in the preset direction.
4. The intake seal structure of claim 3, wherein the number of seal teeth is two, the two seal teeth being spaced apart along the radial direction of the header.
5. The intake seal structure according to claim 3, wherein an end of the seal tooth remote from the connection end is provided with a slope, the slope being located on a side of the seal tooth remote from the first seal member.
6. The intake seal structure of claim 3, wherein a thickness of the seal teeth is less than a thickness of the first seal.
7. A fan comprising an air inlet box and the air inlet sealing structure according to any one of claims 1-6, wherein the air inlet box is connected with the current collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810383673.8A CN108278221B (en) | 2018-04-26 | 2018-04-26 | Air inlet sealing structure and fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810383673.8A CN108278221B (en) | 2018-04-26 | 2018-04-26 | Air inlet sealing structure and fan |
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| CN108278221A CN108278221A (en) | 2018-07-13 |
| CN108278221B true CN108278221B (en) | 2024-02-06 |
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| CN201810383673.8A Active CN108278221B (en) | 2018-04-26 | 2018-04-26 | Air inlet sealing structure and fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110805573B (en) * | 2019-12-12 | 2021-10-12 | 四川德胜集团钒钛有限公司 | Centrifugal fan |
| CN115853829A (en) * | 2022-12-27 | 2023-03-28 | 西安交通大学 | Fan collector and centrifugal fan |
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| CN206487639U (en) * | 2016-12-27 | 2017-09-12 | 天津金鹏机电设备有限公司 | A kind of centrifugal blower case |
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| GB2483448B (en) * | 2010-09-07 | 2015-12-02 | Dyson Technology Ltd | A fan |
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| CN108278221A (en) | 2018-07-13 |
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