Novel fan structure capable of reducing axial force

Abstract

A novel fan structure capable of reducing axial force relates to the technical field of fans and comprises a volute, an air inlet and an air outlet, a mounting cavity is arranged in the volute, and one end of the volute is provided with an air inlet communicated with the mounting cavity and is further provided with the air outlet communicated with the mounting cavity; the turbine is rotationally arranged in the mounting cavity; the end cover body is fixedly installed at the end, away from the air outlet, of the volute and provided with a pressure relief cavity communicating with the external atmospheric pressure, and the installation cavity communicates with the pressure relief cavity; the motor is fixedly installed on the side, away from the volute, of the end cover body, and an output shaft of the motor penetrates through the end cover body, extends into the volute and then is fixedly connected to the turbine so as to drive the turbine to rotate. By the adoption of the technical scheme, the pressure relief cavity communicated with the outside atmospheric pressure is formed in the end cover body and communicated with the mounting cavity, high-pressure gas on the back face of the turbine can enter the pressure relief cavity and then is discharged to the outside, and therefore axial force borne by the turbine is reduced, the service life of the turbine is prolonged, the structure is compact, the production cost is low, and practicability is high; the method has great market competitiveness and has a good market popularization prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and in particular to a novel fan structure for reducing axial force. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and conveying grains; wind tunnel wind source and inflation and propulsion of hovercraft, etc.

[0003] In the related technology, when the fan is working, the motor drives the shaft to rotate, driving the turbine to rotate in the volute, and the air is sucked in from the center of the turbine through the air inlet. Due to the dynamic effect of the blades on the gas, the gas pressure and speed are increased, and under the action of centrifugal force, the gas is thrown toward the casing along the blade path and discharged from the exhaust port.

[0004] However, since the turbine rotates at high speed, high pressure will be generated on the back of the turbine, resulting in a large axial force, which greatly increases the equivalent load of the turbine, reduces the service life of the turbine, and affects the reliability of the fan operation. Utility Model Content

[0005] The utility model aims to address the defects and shortcomings in the prior art and provides a novel fan structure for reducing axial force.

[0006] The technical solution adopted by the utility model is: a new fan structure for reducing axial force, comprising:

[0007] A volute having an installation cavity inside, an air inlet communicating with the installation cavity at one end, and an air outlet communicating with the installation cavity;

[0008] A turbine is rotatably arranged in the mounting cavity;

[0009] The end cover body is fixedly mounted on the end of the volute away from the air outlet, and is provided with a pressure relief chamber connected to the external atmospheric pressure, and the mounting chamber is connected to the pressure relief chamber; and

[0010] The motor is fixedly mounted on a side of the end cover body away from the volute, and its output shaft passes through the end cover body, extends into the volute, and is fixedly connected to the turbine to drive the turbine to rotate.

[0011] Optionally, the end cover body includes a first end cover and a second end cover. The first end cover is fixedly installed at one end of the volute away from the air outlet. One side of the second end cover is fixedly installed on the first end cover. The first end cover and the second end cover cooperate to form the pressure relief cavity, and there is a gap between the first end cover and the second end cover to communicate the pressure relief cavity with the external atmospheric pressure.

[0012] Optionally, the end cover body includes a first end cover and a second end cover. The first end cover is fixedly installed at one end of the volute away from the air outlet. One side of the second end cover is fixedly installed on the first end cover. The first end cover and the second end cover cooperate to form the pressure relief cavity, and a pressure relief hole communicating with the pressure relief cavity is provided on the first end cover or the second end cover to communicate the pressure relief cavity with the external atmospheric pressure.

[0013] Optionally, the pressure relief hole is located on the second end cover, and the pressure relief hole is located at the outer edge of the second end cover away from the first end cover.

[0014] Optionally, a through hole for the output shaft of the motor to pass through is provided on the first end cover, and the through hole is in clearance fit with the output shaft of the motor so that the high-pressure gas in the installation cavity enters the pressure relief cavity through the through hole.

[0015] Optionally, the distance from the center of the output shaft of the motor to the edge of the through hole is within 60 mm.

[0016] Optionally, a bearing groove is provided at the position of the second end cover corresponding to the through hole, and a bearing in close fit with the output shaft of the motor is provided in the bearing groove.

[0017] Optionally, the volute has an air duct. One end of the air duct communicates with the installation cavity, and the air outlet is located at one end of the air duct away from the installation cavity.

[0018] Optionally, an installation plate is provided on the bottom side of the motor, and bolt holes adapted to cooperate with bolts are provided on the installation plate to fix the motor.

[0019] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0020] 1. When the present application is in use, the turbine is driven by the motor to rotate, and the turbine rotates at a high speed. At this time, external air enters the installation cavity from the air inlet. Due to the dynamic effect of the turbine on the gas, the pressure of the gas entering the installation cavity increases and is discharged from the air outlet. At this time, the high-pressure gas generated on the back of the turbine enters the pressure relief cavity from the installation cavity and then leaks into the external atmospheric pressure, thereby effectively reducing the pressure on the back of the turbine, reducing the axial force on the turbine, prolonging the service life of the turbine, making the entire fan operate more stably and reliably, having a compact structure, strong practicability, improving the market competitiveness, and having a better market application prospect;

[0021] 2. In the present application, by arranging the bearing on the second end cover instead of in the through hole on the first end cover, the bearing is not easily affected by the axial force, the service life of the bearing is prolonged, and at this time, the bearing can stably cooperate with the output shaft of the motor, enabling the motor to stably drive the turbine to rotate, ensuring the stability and reliability of the operation of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is the overall structural schematic diagram of the first embodiment;

[0024] Figure 2 is Figure 1 another perspective view of;

[0025] Figure 3 is the partial cross-sectional view of the first embodiment;

[0026] Figure 4 is Figure 3 the enlarged view of part A in;

[0027] Figure 5 is the exploded view of the first embodiment;

[0028] Figure 6 is Figure 5 another perspective view of.

[0029] Description of the reference numerals: 10, volute; 11, installation cavity; 12, air inlet; 13, air outlet; 14, air duct; 20, turbine; 30, end cover body; 301, pressure relief cavity; 31, first end cover; 311, through hole; 32, second end cover; 321, bearing groove; 322, bearing; 33, gap; 40, motor; 41, output shaft; 42, mounting plate; 421, bolt hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will combine the attached drawings in the embodiments of the present invention Figures 1-4 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] It should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "back", "side", "circumferential", etc. of the present utility model is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms such as "first" and "second" are only used to distinguish multiple components or structures with the same or similar structures, and do not represent a special limitation on the setting order or connection relationship.

[0032] Embodiment 1:

[0033] This embodiment relates to a novel fan structure for reducing axial force. Referring to Figures 1-6 , it includes a volute 10, a turbine 20, an end cover body 30, and a motor 40. Among them, an installation cavity 11 is provided inside the volute 10. An air inlet 12 communicating with the installation cavity 11 is opened at one end of the volute 10, and an air outlet 13 communicating with the installation cavity 11 is also opened on the volute 10. The turbine 20 is rotatably arranged in the installation cavity 11. The turbine 20 has a plurality of impellers. And in this embodiment, the side of the turbine 20 facing the air inlet 12 is the front of the turbine 20, and the side of the turbine 20 facing away from the air inlet 12 is the back of the turbine 20.

[0034] The end cover body 30 is fixedly installed at one end of the volute 10 facing away from the air outlet. A pressure relief cavity 301 communicating with the outside atmospheric pressure is provided inside the end cover body 30. The pressure relief cavity 301 communicates with the installation cavity 11, so that the high-pressure gas in the installation cavity 11 can enter the pressure relief cavity 301 and be discharged to the outside atmospheric pressure. The motor 40 is fixedly installed on the side of the end cover body 30 facing away from the volute 10. The output shaft 41 of the motor 40 passes through the end cover body 30 and extends into the volute 10 and is fixedly connected to the turbine 20 to drive the turbine 20 to rotate.

[0035] It can be understood that during use, the turbine 20 is driven to rotate by the motor 40. At this time, the gas in the installation cavity 11 is driven to do work, so that the gas pressure in the installation cavity 11 becomes high-pressure gas and is discharged from the air outlet 13. Since the installation cavity 11 communicates with the pressure relief cavity 301, the high-pressure gas on the back of the turbine 20 will enter the pressure relief cavity 301 and be discharged to the external atmosphere, thereby realizing the discharge of the high-pressure gas on the back of the turbine 20, effectively reducing the pressure on the back of the turbine 20, reducing the axial force received by the turbine 20, thereby prolonging the service life of the turbine 20 and making the whole fan operate more stably and reliably.

[0036] Further, the end cover body 30 includes a first end cover 31 and a second end cover 32. The first end cover 31 is fixedly installed at one end of the volute 10 facing away from the air outlet 13. One side of the second end cover 32 is fixedly installed on the first end cover 31. The first end cover 31 and the second end cover 32 cooperate to form a pressure relief chamber 301, and there is a gap 33 between the first end cover 31 and the second end cover 32 to communicate the pressure relief chamber 301 with the external atmospheric pressure.

[0037] In this embodiment, the end cover body 30 is the first end cover 31 and the second end cover 32. In other embodiments, the end cover body 30 may not be split. It is only necessary to provide a gap 33 on the end cover body 30 to communicate the pressure relief chamber 301 with the external atmospheric pressure.

[0038] It can be understood that the pressure relief chamber 301 communicated with the installation cavity 11 is formed by the cooperation of the first end cover 31 and the second end cover 32, so that the high-pressure gas generated when the turbine 20 works can enter the pressure relief chamber 301 and be discharged to the external atmospheric pressure, thereby reducing the pressure on the back of the turbine 20, reducing the axial force received by the turbine 20, and further extending the service life of the turbine 20.

[0039] Further, a through hole 311 for the output shaft 41 of the motor 40 to pass through is provided on the first end cover 31. The through hole 311 is in clearance fit with the output shaft 41 of the motor 40, so that the high-pressure gas in the installation cavity 11 can enter the pressure relief chamber 301 through the through hole 311.

[0040] It should be noted that in this embodiment, the side of the volute 10 facing away from the air inlet 12 is open. The first end cover 31 is used to close the opening of the volute 10 to close the installation cavity 11. Through the setting of the through hole 311, the output shaft 41 of the motor 40 passes through the through hole 311 and is fixedly connected to the turbine 20, so that the motor 40 can drive the turbine 20 to rotate at a high speed. At the same time, the output shaft 41 of the motor 40 and the through hole 311 are set in clearance fit, so that the high-pressure gas in the installation cavity 11 can enter the pressure relief chamber 301 through the gap 33 between the output shaft 41 and the through hole 311.

[0041] Further, the unilateral distance from the center of the output shaft 41 of the motor 40 to the edge of the through hole 311 is within 60 mm. That is, in this embodiment, the radius of the through hole 311 is 0 - 60 mm. When the radius of the through hole 311 needs to be adjusted, the radius of the output shaft 41 of the motor 40 is correspondingly adjusted to achieve clearance fit between the output shaft 41 of the motor 40 and the through hole 311.

[0042] Furthermore, a bearing groove 321 is provided at the position of the second end cover 32 corresponding to the through hole 311. A bearing 322 is fixedly installed in the bearing groove 321. The bearing 322 is used to closely cooperate with the output shaft 41 of the motor 40, so that the output shaft 41 of the motor 40 can stably drive the impeller to rotate.

[0043] It can be understood that by arranging the bearing 322 in the bearing groove 321 that closely cooperates with the output shaft 41 of the motor 40, the output shaft 41 of the motor 40 can stably drive the impeller to rotate, thereby ensuring the stability and reliability of the operation of the fan. At the same time, by arranging the bearing groove 321 and the bearing 322 on the second end cover 32, the bearing 322 is not easily affected by the axial force, thereby prolonging the service life of the bearing 322.

[0044] Furthermore, the volute 10 has an air duct 14. One end of the air duct 14 is communicated with the installation cavity 11, and the air outlet is located at the end of the air duct 14 away from the installation cavity 11.

[0045] It can be understood that when the fan is working, the motor 40 drives the turbine 20 to rotate at a high speed. The outside air continuously enters the installation cavity 11 from the air inlet 12. At this time, the dynamic action of the turbine 20 on the outside air increases the pressure of the air entering the installation cavity 11 and enters the air duct 14 and is discharged from the air outlet, realizing external air supply to meet the air supply requirements of different scenarios.

[0046] Furthermore, an installation plate 42 is provided on the bottom side of the motor 40. Bolt holes adapted to cooperate with bolts are provided on the installation plate 42, so that the motor 40 can be fixed through the bolt holes 421.

[0047] Through the arrangement of the installation plate 42 and the bolt holes, the motor 40 can be fixed during use, thereby ensuring the stability of the motor 40, that is, improving the overall stability of the fan.

[0048] Embodiment 2:

[0049] The difference between this embodiment and Embodiment 1 is that the communication mode between the pressure relief cavity 301 and the external atmospheric pressure is different.

[0050] Specifically, the end cover body 30 includes a first end cover 31 and a second end cover 32. The first end cover 31 is fixedly installed at one end of the volute 10 facing away from the air outlet 13. One side of the second end cover 32 is fixedly installed on the first end cover 31. The first end cover 31 and the second end cover 32 cooperate to form a pressure relief cavity 301, and a pressure relief hole (not shown in the figure) communicating with the pressure relief cavity 301 is provided on the first end cover 31 or the second end cover 32, so that the pressure relief cavity 301 communicates with the external atmospheric pressure through the pressure relief hole.

[0051] It can be understood that by providing the pressure relief hole, the pressure relief chamber 301 can be communicated with the external atmospheric pressure, so that the high-pressure gas (the gas on the back of the turbine 20) in the installation chamber 11 can enter the pressure relief chamber 301 and be discharged to the outside through the pressure relief hole, thereby reducing the axial force on the turbine 20 and extending the service life of the turbine 20.

[0052] In addition, in this embodiment, the pressure relief hole is located on the second end cover 32, and the pressure relief hole is located at the outer edge of the second end cover 32 away from the first end cover 31.

[0053] Through the above settings, the high-pressure gas in the pressure relief chamber 301 can be smoothly discharged to the outside, avoiding the situation of untimely pressure relief caused by the pressure relief hole being set elsewhere.

[0054] The above is only used to illustrate the technical solution of the present invention and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A novel fan structure for reducing axial force, characterized in that, Comprising: A volute (10) having an installation cavity (11) inside, with an air inlet (12) communicating with the installation cavity (11) opened at one end thereof, and an air outlet (13) communicating with the installation cavity (11) also provided thereon; A turbine (20) rotatably arranged inside the installation cavity (11); An end - cover body (30) fixedly installed at one end of the volute (10) away from the air outlet, having a pressure - relief cavity (301) communicating with the external atmospheric pressure, and the installation cavity (11) communicating with the pressure - relief cavity (301); and A motor (40) fixedly installed on the side of the end - cover body (30) away from the volute (10), and its output shaft (41) passes through the end - cover body (30) and extends into the volute (10) and is fixedly connected to the turbine (20) to drive the turbine (20) to rotate.

2. A novel fan structure for reducing axial force according to claim 1, characterized in that The end - cover body (30) includes a first end - cover (31) and a second end - cover (32). The first end - cover (31) is fixedly installed at one end of the volute (10) away from the air outlet (13). One side of the second end - cover (32) is fixedly installed on the first end - cover (31). The first end - cover (31) and the second end - cover (32) cooperate to form the pressure - relief cavity (301), and there is a gap (33) between the first end - cover (31) and the second end - cover (32) to enable the pressure - relief cavity (301) to communicate with the external atmospheric pressure.

3. A novel fan structure for reducing axial force according to claim 1, characterized in that, The end - cover body (30) includes a first end - cover (31) and a second end - cover (32). The first end - cover (31) is fixedly installed at one end of the volute (10) away from the air outlet (13). One side of the second end - cover (32) is fixedly installed on the first end - cover (31). The first end - cover (31) and the second end - cover (32) cooperate to form the pressure - relief cavity (301), and a pressure - relief hole communicating with the pressure - relief cavity (301) is opened on the first end - cover (31) or the second end - cover (32) to enable the pressure - relief cavity (301) to communicate with the external atmospheric pressure.

4. A novel fan structure for reducing axial force according to claim 3, characterized in that, The pressure - relief hole is located on the second end - cover (32), and the pressure - relief hole is located at the outer edge of the second end - cover (32) away from the first end - cover (31).

5. A novel fan structure for reducing axial force according to claim 2 or 3, characterized in that, A through - hole (311) for the output shaft (41) of the motor (40) to pass through is opened on the first end - cover (31). The through - hole (311) has a clearance fit with the output shaft (41) of the motor (40) so that the high - pressure gas in the installation cavity (11) enters the pressure - relief cavity (301) through the through - hole (311).

6. A novel fan structure for reducing axial force according to claim 5, characterized in that The unilateral distance from the center of the output shaft (41) of the motor (40) to the edge of the through - hole (311) is within 60 mm.

7. A novel fan structure for reducing axial force according to claim 5, characterized in that, A bearing groove (321) is provided at the position of the second end - cover (32) corresponding to the through - hole (311), and a bearing (322) closely fitted with the output shaft (41) of the motor (40) is arranged in the bearing groove (321).

8. A novel fan structure for reducing axial force according to claim 1, characterized in that, The volute (10) has an air duct (14). One end of the air duct (14) communicates with the installation cavity (11), and the air outlet is located at one end of the air duct (14) away from the installation cavity (11).

9. A novel fan structure for reducing axial force according to claim 1, characterized in that A mounting plate (42) is provided on the bottom side of the motor (40), and bolt holes (421) adapted to cooperate with bolts are formed in the mounting plate (42) so as to fix the motor (40).

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