Impeller with auxiliary heat dissipation structure and fan with same

Abstract

The impeller with auxiliary heat dissipation structure and the fan with the same, which adopts the import flow guide body including the flow guide upper cover, the flow guide blade, the flow guide lower cover, the front edge of the working blade and the tail edge of the flow guide blade exist the overlapping area in the axial view of the import direction end, and the import end of the heat dissipation hole is located in the overlapping area of the axial view; so that the airflow turbulence at the impeller import is reduced, the blade front edge wear and the noise problem of the impeller are greatly reduced. The motor heat dissipation impeller is also installed on the hub, the structure of the impeller forced cooling is adopted, and the service life of the motor is prolonged. The outer air guide ring and the upper cover plate exist the backflow overlapping area in the axial view of the import direction end, the inner air guide ring and the lower cover plate exist the flow guide overlapping area in the axial view of the import direction end, and the backflow guide vane is arranged on the surface of the outer air guide ring in the backflow overlapping area, which can obviously optimize the import flow state of the impeller and accelerate the flow of the outflow fluid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid machinery, in particular to an impeller with an auxiliary heat dissipation structure, and more particularly to a fan with the same. BACKGROUND

[0002] The fan impeller is the "heart" of the fan equipment, and its design (such as blade shape, angle) and material directly affect the efficiency, energy consumption and reliability of the fan. The core function is to achieve energy conversion through mechanical movement and drive gas flow to meet the needs of different scenarios. The existing fan impellers on the market generally have problems such as high noise and low efficiency. With the increasing demand for fans, the performance improvement of fan impellers is becoming more and more intense. Therefore, it is necessary to optimize the design of fan impellers and fan structures.

[0003] The prior art CN117905712A discloses a two-stage variable-speed low-noise axial flow fan, which comprises a first-stage axial flow fan module 2, an intermediate axial flow transition structure 3 and a second-stage axial flow fan module 4 installed in a housing 1. The first-stage axial flow fan module 2 and the second-stage axial flow fan module 4 each comprise an impeller, a guide vane and a driving module. The guide vane is fixedly installed in the housing 1, and the driving module is fixedly installed on the guide vane. The impeller is driven to rotate by the motor of the driving module to achieve rapid gas flow. The intermediate axial flow transition structure 3 comprises an outer cover 31 and a flow guide cover 32, and an intermediate axial flow transition passage is formed between the outer cover 31 and the flow guide cover 32. The intermediate axial flow transition passage is in communication with the gas flow passages in the first-stage axial flow fan module 2 and the second-stage axial flow fan module 4, respectively. The gas at the air inlet of the housing enters the first-stage gas flow passage and flows rapidly under the mechanical force of the first-stage impeller 22. After being buffered by the intermediate axial flow transition passage, the gas is sent into the second-stage gas flow passage, and then reaches the required flow rate and wind pressure under the mechanical force of the second-stage impeller 42. The gas is then sent out axially from the air outlet of the housing. The motor is installed in the two-stage axial flow fan, and there is no need to set a fan, which is conducive to reducing noise. At the same time, the formation of the gas micro-circulation passage between the impeller and the guide vane and the setting of the intermediate axial flow transition section are conducive to heat dissipation of the driving device and improve the reliability and service life of the driving device. Under the condition that the fan total pressure and flow rate remain unchanged, the two-stage fan has smaller noise than the single-stage fan. Through the optimization design of the single mixed flow impeller axial flow fan built-in motor and guide vane and the intermediate axial flow transition structure, the operating noise of the fan is significantly reduced.

[0004] However, the above structure has design limitations, and in the actual application process of the fan, there are still problems such as high noise, poor heat dissipation and low efficiency. Therefore, in view of these problems, the present applicant proposes an impeller with an auxiliary heat dissipation structure and a fan with the same. SUMMARY

[0005] The impeller with the auxiliary heat dissipation structure and the fan with the same are provided to solve the problems in the prior art.

[0006] To achieve the above object, the present application adopts the following technical scheme.

[0007] The impeller with the auxiliary heat dissipation structure comprises an upper cover plate, a lower cover plate, working blades, a hub, an inlet flow guide, heat dissipation holes, and a motor heat dissipation impeller. The upper cover plate, the working blades, and the lower cover plate are sequentially connected and fixed to the outer side of the hub. The lower cover plate is provided with the heat dissipation holes penetrating therethrough, and the heat dissipation holes are communicated with a motor chamber. The inlet flow guide is located at the inlet side of the hub and is tightly connected with the lower cover plate. The motor heat dissipation impeller is further installed on the hub. The inlet flow guide comprises an upper flow guide cover, flow guide blades, and a lower flow guide cover. The leading edge of the working blade and the trailing edge of the flow guide blade overlap in an axial view of the end of the inlet direction, and the inlet end of the heat dissipation hole is located in the overlapping area in the axial view. The motor heat dissipation impeller comprises a plurality of heat dissipation blades in a right angle structure. The heat dissipation blade comprises a radial blade, a transition blade, and an axial blade which are sequentially connected. The transition blade is a backward inclined and twisted blade in a fan shape.

[0008] Further, the working blade and the axial blade are forward inclined and twisted blades.

[0009] Further, the flow guide blade and the radial blade are cylindrical blades.

[0010] Further, the fan-shaped angle A of the transition blade is 30°-45°.

[0011] Further, the inlet radius of the impeller is R, the fan-shaped outer side radius of the transition blade is R1, and the fan-shaped inner side radius is R2, wherein R1-R2=(0.15-0.28)R.

[0012] Further, the radial outlet end of the radial blade is provided with a radial flow regulating vane, the transition blade is provided with two flow regulating transition vanes along the circumferential direction, and the axial inlet end of the axial blade is provided with an axial flow regulating vane. The radial flow regulating vane corresponds to the inlet end of the flow passage formed by the two flow regulating transition vanes, and the axial flow regulating vane corresponds to the outlet end of the flow passage formed by the two flow regulating transition vanes.

[0013] A fan, which comprises a wind drum, a motor shell, a motor, a wind guide body, a wind drum guide vane, a current collector, a controller and an impeller, the motor is fixed in the wind drum through the motor shell, the current collector is installed at one end of the wind drum and matches with the impeller in a gap, the wind drum guide vane is arranged in the wind drum, the motor shaft penetrates the motor and the impeller in sequence, the wind guide body is annularly arranged at the axial rear end of the impeller and is connected with the wind drum, characterized in that the wind guide body comprises an outer wind guide ring, an inner wind guide ring and a wind guide vane, the wind guide vane is arranged in the flow channel formed by the outer wind guide ring and the inner wind guide ring, the outer wind guide ring and the upper cover plate exist a backflow overlapping area in the axial view at the inlet direction end, the inner wind guide ring and the lower cover plate exist a flow guide overlapping area in the axial view at the inlet direction end, backflow guide vanes are arranged on the surface of the outer wind guide ring in the backflow overlapping area, flow guide vanes are arranged on the surface of the inner wind guide ring in the flow guide overlapping area, and the impeller adopts an impeller with an auxiliary heat dissipation structure.

[0014] Further, the controller is fixedly installed at one side of the air outlet flow channel of the motor, the controller is circumferentially provided with heat dissipation wind guide fins, the heat dissipation wind guide fins accelerate heat dissipation of the controller and guide the air flow at the air outlet end into the motor to cool the motor.

[0015] Further, the inner side wall of the wind drum is provided with a motor shell heat dissipation discharge groove in a ring structure, the air outlet direction of the motor shell heat dissipation discharge groove is parallel to the axis.

[0016] Further, the backflow guide vanes are front-inclined bent-twisted vanes, and the flow guide vanes are rear-inclined bent-twisted vanes.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. In the prior art, there is generally airflow turbulence at the impeller inlet, and the blade leading edge is severely worn. The present application uses an inlet flow guide body comprising a flow guide upper cover, flow guide vanes and a flow guide lower cover, the leading edge of the working vane and the trailing edge of the flow guide vane exist an overlapping area in the axial view at the inlet direction end, and the inlet end of the heat dissipation hole is located in the overlapping area in the axial view; the inlet flow guide body increases the secondary flow at the inlet, so that the airflow at the trailing edge of the flow guide vane is effectively premixed with the airflow at the leading edge of the working vane, thereby reducing the airflow turbulence at the impeller inlet and greatly reducing the blade leading edge wear and the noise problem of the impeller.

[0019] 2. In the prior art, the motor heat dissipation needs to be connected with a cooling liquid or separately use fluid backflow cooling, but the cooling effect of the above-mentioned way is general, and the temperature reduction and cooling are slow. The present application further installs a motor heat dissipation impeller on the hub; the motor heat dissipation impeller comprises a plurality of heat dissipation vanes in a right angle structure, the heat dissipation vanes comprise radial vanes, transition vanes and axial vanes connected in sequence, the transition vanes are rear-inclined bent-twisted vanes in a fan shape, the structure of the impeller forced cooling is adopted, and the impeller is a composite impeller structure, forming a flowing heat dissipation cycle, which is convenient for rapid heat dissipation of the motor and prolongs the service life of the motor.

[0020] 3. To improve the heat dissipation effect of the motor, the present invention further optimizes the structure of the heat dissipation impeller. A radial rectifier guide vane is set at the radial outlet end of the radial blade, two rectifier transition guide vanes are set along the circumferential direction of the transition blade, and an axial rectifier blade is set at the axial inlet end of the axial blade. The radial rectifier guide vane corresponds to the inlet end of the flow channel formed by the two rectifier transition guide vanes, and the axial rectifier blade corresponds to the outlet end of the flow channel formed by the two rectifier transition guide vanes. The design of the rectifier guide vane structure improves the heat dissipation efficiency and can also greatly reduce the noise generated by fluid flow inside the motor housing, such as impact and friction.

[0021] 4. In existing technologies, the air guide body only serves to guide the flow. However, the present invention uses an air guide body comprising an outer air guide ring, an inner air guide ring, and air guide vanes. The air guide vanes are disposed in the flow channel formed by the outer and inner air guide rings. In the axial view of the inlet direction, the outer air guide ring and the upper cover plate have a backflow overlap area, and in the axial view of the inlet direction, the inner air guide ring and the lower cover plate have a diversion overlap area. A backflow guide vane is disposed on the surface of the outer air guide ring in the backflow overlap area, and a diversion guide vane is disposed on the surface of the inner air guide ring in the diversion overlap area. The design of the backflow guide vane allows the fluid to return to the impeller inlet through the collector, which can significantly optimize the inlet flow state of the impeller. The design of the diversion guide vane allows the fluid to be pressurized by the heat dissipation impeller and further premixed in the inlet and outlet fluids, forming a jet effect and accelerating the flow of the outlet fluid.

[0022] 5. In order to improve the heat dissipation efficiency of the controller, the present invention adopts a heat dissipation guide fin arranged around the controller. The heat dissipation guide fin accelerates the heat dissipation of the controller and guides the airflow at the outlet end into the motor to cool the motor. The above structure further accelerates the heat dissipation effect of the motor and the controller. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the fan structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the motor cooling impeller structure of the present invention;

[0025] Figure 3 for Figure 2 Schematic diagram of the intermediate transition blade structure;

[0026] Figure 4 for Figure 1 Enlarged view of the central wind guide structure.

[0027] In the diagram: 1. Upper cover plate; 2. Lower cover plate; 3. Working blades; 4. Hub; 5. Inlet guide vane; 6. Heat dissipation hole; 7. Motor heat dissipation impeller; 8. Upper guide cover; 9. Guide vane; 10. Lower guide cover; 71. Radial blade; 72. Transition blade; 73. Axial blade; 711. Radial rectifier guide vane; 721 and 722. Axial rectifier blade; 731. Air duct; 8. Motor housing; 9. Motor; 10. Air guide body; 11. Air duct guide vane; 12. Collector; 13. Controller; 14. Outer guide ring; 111. Inner guide ring; 112. Guide vane; 113. Return guide vane; 114. Guide vane; 115. Heat dissipation guide fins; 16. Heat dissipation exhaust groove of motor housing; 7. Sector angle A of transition blade; 8. Impeller inlet radius R; 9. Outer sector radius R1 of transition blade; 10. Indicator radius R2 of transition blade; 11. Arrows “→, ←, ↑, ↓” indicate fluid flow direction. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] like Figures 1-4 As shown, an impeller with an auxiliary heat dissipation structure includes an upper cover plate 1, a lower cover plate 2, working blades 3, a hub 4, an inlet guide fluid 5, heat dissipation holes 6, and a motor heat dissipation impeller 7. The upper cover plate 1, working blades 3, and lower cover plate 2 are sequentially connected and fixed to the outside of the hub 4. The lower cover plate 2 has a through heat dissipation hole 6, which connects to the motor chamber. The inlet guide fluid 5 is located on the inlet side of the hub 4 and is fastened to the lower cover plate 2. The hub 4 is also equipped with a motor heat dissipation impeller 7. The inlet guide fluid 5 includes an upper guide cover 51, a guide blade 52, and a lower guide cover 53. The leading edge of the working blade 3 and the trailing edge of the guide blade 52 overlap in the axial view at the inlet direction. The inlet end of the heat dissipation hole 6 is located in the overlapping area of ​​the axial view. The motor heat dissipation impeller 7 includes several heat dissipation blades with a right-angle structure. The heat dissipation blades include radial blades 71, transition blades 72, and axial blades 73 connected in sequence. The transition blades 72 are fan-shaped backward-curved twisted blades.

[0031] Furthermore, both the working blade 3 and the axial blade 73 are forward-tilting and twisted blades.

[0032] Furthermore, both the drainage blade 52 and the radial blade 71 are cylindrical blades.

[0033] Further, the sector angle A of the transition blade 72 is 30°-45°.

[0034] Further, the inlet radius of the impeller is R, the radius of the outer side of the sector of the transition blade 72 is R1, and the radius of the inner side of the sector is R2, wherein R1-R2=(0.15-0.28)R.

[0035] Further, the radial outlet end of the radial blade 71 is provided with a radial rectification guide vane 711, the transition blade 72 is provided with two rectification transition vanes 721, 722 along the circumferential direction, and the axial inlet end of the axial blade 73 is provided with an axial rectification vane 731, the radial rectification guide vane 711 corresponds to the inlet end of the flow passage formed by the two rectification transition vanes 721, 722, and the axial rectification vane 731 corresponds to the outlet end of the flow passage formed by the two rectification transition vanes 721, 722.

[0036] A fan includes a duct 8, a motor housing 9, a motor 10, a guide body 11, a duct guide vane 12, a flow collector 13, a controller 14, and an impeller; the motor 10 is fixed in the duct 8 through the motor housing 9, the flow collector 13 is installed at one end of the duct 8 and gap-fitted with the impeller, the duct guide vane 12 is arranged in the duct 8, and the motor shaft penetrates the motor 10 and the impeller in sequence, and the guide body 11 is annularly arranged at the axial rear end of the impeller and connected with the duct 8, characterized in that the guide body 11 includes an outer guide ring 111, an inner guide ring 112, and guide vanes 113 arranged in the flow passage formed by the outer guide ring 111 and the inner guide ring 112, the outer guide ring 111 has a backflow overlapping area with the upper cover plate 1 in the axial view at the inlet direction end, the inner guide ring 112 has a flow guiding overlapping area with the lower cover plate 2 in the axial view at the inlet direction end, backflow guide vanes 114 are arranged on the surface of the outer guide ring 111 in the backflow overlapping area, and flow guiding guide vanes 115 are arranged on the surface of the inner guide ring 112 in the flow guiding overlapping area, and the impeller adopts an impeller with an auxiliary heat dissipation structure.

[0037] Further, the controller 14 is fixedly installed on one side of the outlet flow passage of the motor 10, the controller 14 is circumferentially provided with heat dissipation guide vanes 15, the heat dissipation guide vanes 15 accelerate heat dissipation of the controller 14 and guide the outlet airflow into the motor 10 to cool the motor.

[0038] Further, the inner side wall of the duct 8 is provided with a motor housing heat dissipation discharge groove 16 in a ring structure, and the outlet direction of the motor housing heat dissipation discharge groove 16 is parallel to the axis.

[0039] Further, the backflow guide vanes 114 are front-inclined bent-twisted vanes, and the flow guiding guide vanes 115 are rear-inclined bent-twisted vanes.

[0040] The prior art has the problems of airflow turbulence at the impeller inlet and serious wear of the blade leading edge; the present application uses an inlet flow guide including an upper guide cover, guide vanes and a lower guide cover, the leading edge of the working vanes and the trailing edge of the guide vanes overlap in the axial view of the inlet direction end, and the inlet end of the heat dissipation hole is located in the overlapping area in the axial view; the inlet flow guide increases the secondary flow at the inlet, effectively premixes the airflow of the trailing edge of the guide vanes with the airflow of the leading edge of the working vanes, reduces the airflow turbulence at the impeller inlet, and greatly reduces the wear of the blade leading edge and the noise of the impeller.

[0041] The prior art needs to connect a cooling liquid or separately use fluid backflow cooling for motor heat dissipation, but the cooling effect of the above-mentioned way is general, and the cooling is slow, and the motor heat dissipation impeller is further installed on the hub; the motor heat dissipation impeller includes a plurality of right-angle structure heat dissipation blades, the heat dissipation blades include radially arranged blades, transition blades and axially arranged blades, the transition blades are rear-inclined bent and twisted blades in a fan shape, the structure of the impeller forced cooling is used, and the impeller is a composite impeller structure, a flowing heat dissipation cycle is formed, the motor is rapidly heat dissipated, and the service life of the motor is prolonged.

[0042] In order to improve the heat dissipation effect of the motor, the structure of the heat dissipation impeller is further optimized, the radial outlet end of the radial blade is provided with a radial flow guide vane, the transition blade is provided with two flow guide transition vanes along the circumferential direction, and the axial inlet end of the axial blade is provided with an axial flow guide vane; the inlet end of the flow channel formed by the radial flow guide vane and the two flow guide transition vanes corresponds to the outlet end of the flow channel formed by the axial flow guide vane and the two flow guide transition vanes; the design of the flow guide vane structure improves the heat dissipation efficiency, and the flow guide vane structure can also greatly reduce the noise generated by the fluid flow in the motor shell, such as impact and friction.

[0043] The prior art only has the effect of guiding flow, and the present application uses a guide body including an outer guide ring, an inner guide ring and guide vanes, the guide vanes are arranged in the flow channel formed by the outer guide ring and the inner guide ring, the outer guide ring and the upper cover plate have a backflow overlapping area in the axial view of the inlet direction end, the inner guide ring and the lower cover plate have a flow guide overlapping area in the axial view of the inlet direction end, backflow guide vanes are arranged on the surface of the outer guide ring in the backflow overlapping area, and flow guide vanes are arranged on the surface of the inner guide ring in the flow guide overlapping area; the design of the backflow guide vanes enables the fluid to flow back to the impeller inlet through the flow collector, which can obviously optimize the inlet flow state of the impeller, and the design of the flow guide vanes enables the fluid to be pressurized through the heat dissipation impeller, which further premixes the inlet and outlet flow fluids, forms a jet effect, and accelerates the flow of the outlet flow fluid.

[0044] In order to improve the heat dissipation efficiency of the controller, the controller is provided with heat dissipation air guide fins in the circumferential direction, the heat dissipation air guide fins accelerate the heat dissipation of the controller and guide the airflow at the air outlet end into the motor to cool the motor, and the above structure further accelerates the heat dissipation effect of the motor and the controller.

[0045] The above embodiments are illustrative of the present application and are not limiting of the present application. It is to be understood that variations, modifications, substitutions and changes can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A kind of impeller with auxiliary heat dissipation structure, it includes upper cover plate (1), lower cover plate (2), working blade (3), hub (4), import guide body (5), heat dissipation hole (6), motor heat dissipation impeller (7), upper cover plate (1), working blade (3), lower cover plate (2) sequentially connect and are fixed in the outside of hub (4), lower cover plate (2) is equipped with the heat dissipation hole (6) that passes through, heat dissipation hole (6) is communicated motor chamber;It is characterized by: The import flow guide (5) is located at the import side of the wheel hub (4) and is fixedly connected with the lower cover plate (2); the wheel hub (4) is further provided with a motor heat dissipation impeller (7); the import flow guide (5) comprises an upper flow guide cover (51), a flow guide blade (52) and a lower flow guide cover (53); the front edge of the working blade (3) and the tail edge of the flow guide blade (52) have an overlapping area in the axial view at the import direction end; the import end of the heat dissipation hole (6) is located in the overlapping area in the axial view; the motor heat dissipation impeller (7) comprises a plurality of heat dissipation blades in a right angle structure, the heat dissipation blade comprises a radial blade (71), a transition blade (72) and an axial blade (73) connected in sequence, wherein the transition blade (72) is a backward inclined bent and twisted blade in a fan shape; the working blade (3) and the axial blade (73) are forward inclined bent and twisted blades; the flow guide blade (52) and the radial blade (71) are cylindrical blades; the radial outlet end of the radial blade (71) is provided with a radial flow guide vane (711); the transition blade (72) is provided with two flow guide transition vanes (721, 722) along the circumferential direction; the axial inlet end of the axial blade (73) is provided with an axial flow guide vane (731); the radial flow guide vane (711) corresponds to the import end of the flow channel formed by the two flow guide transition vanes (721, 722); the axial flow guide vane (731) corresponds to the outlet end of the flow channel formed by the two flow guide transition vanes (721, 722).

2. The impeller with auxiliary heat radiation structure according to claim 1, characterized in that, The fan angle A of the transition blade (72) is 30-45 degrees.

3. The impeller with auxiliary heat radiation structure according to claim 1, characterized in that, The import radius of the impeller is R, the fan outer side radius of the transition blade (72) is R1, and the fan inner side radius is R2, wherein R1-R2=(0.15-0.28)R.

4. A fan comprising a fan barrel (8), a motor housing (9), a motor (10), a guide body (11), a fan barrel guide vane (12), a collector (13), a controller (14), and an impeller; the motor (10) is fixed in the fan barrel (8) through the motor housing (9), the collector (13) is installed at one end of the fan barrel (8) and matches with the impeller in clearance, the fan barrel guide vane (12) is arranged in the fan barrel (8), the motor shaft penetrates the motor (10) and the impeller in sequence, and the guide body (11) is annularly arranged at the axial rear end of the impeller and connected with the fan barrel (8), characterized in that, The air guide body (11) comprises an outer air guide ring (111), an inner air guide ring (112) and an air guide blade (113); the air guide blade (113) is arranged in the flow channel formed by the outer air guide ring (111) and the inner air guide ring (112); the outer air guide ring (111) has a backflow overlapping area in the axial view at the import direction end of the upper cover plate (1); the inner air guide ring (112) has a flow guide overlapping area in the axial view at the import direction end of the lower cover plate (2); the surface of the outer air guide ring (111) in the backflow overlapping area is provided with a backflow guide vane (114); the surface of the inner air guide ring (112) in the flow guide overlapping area is provided with a flow guide vane (115); and the impeller adopts the impeller with the auxiliary heat dissipation structure in any one of claims 1-3.

5. A fan as claimed in claim 4, wherein The controller (14) is fixedly installed on one side of the air outlet flow channel of the motor (10); the controller (14) is circumferentially provided with a heat dissipation air guide fin (15); the heat dissipation air guide fin (15) accelerates heat dissipation of the controller (14) and guides the air flow at the air outlet end into the motor (10) to cool the motor.

6. A fan as claimed in claim 4, wherein The inner side wall of the air duct (8) is provided with a motor shell heat dissipation discharge groove (16) in a ring structure; the air outlet direction of the motor shell heat dissipation discharge groove (16) is parallel to the axis.

7. A fan as claimed in claim 4, wherein The backflow guide vane (114) is a forward inclined bent and twisted blade, and the flow guide vane (115) is a backward inclined bent and twisted blade.

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