Dry and wet dual-purpose dust collection fan

Abstract

The utility model discloses a wet and dry dual-purpose dust collection fan which comprises a front support, a machine frame outer shell and a machine frame inner shell, a rear fan cover is arranged on the rear portion of the machine frame outer shell, the rear fan cover is connected with the machine frame outer shell, a driver and a driving heat dissipation plate are arranged in the rear fan cover, and heat dissipation air inlet holes are formed in the rear fan cover. A motor shaft is arranged in the rack inner shell, a heat dissipation air guide ring is arranged on the front portion of the rack inner shell, the heat dissipation air guide ring is connected with the front portion of the rack inner shell, heat dissipation air guide holes are formed in the heat dissipation air guide ring, a flow guide portion which is concave inwards and a flow blocking portion surrounding the flow guide portion are arranged on the rear portion of the front support, and heat dissipation fan blades are arranged between the heat dissipation air guide ring and the flow guide portion. The heat dissipation fan blades are connected with the motor shaft, and a heat dissipation air outlet is formed between the flow guide part and the flow blocking part. When the dust collection fan operates at high power, the heat dissipation fan blades rotate to suck outside air into the rear fan cover to dissipate heat of the driver and the winding wire set, it is guaranteed that the fan stably operates in dust and water vapor scenes, and the service life of the fan is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dust -collecting fan technical field, concretely is a dry and wet dual -purpose dust -collecting fan. BACKGROUND

[0002] The patent no. 201520234497.3 discloses a dust collector fan, which comprises a motor, a wind guide cover is installed on the end cover of the motor. The middle part of the end face of the cover body of the wind guide cover is provided with a first air inlet hole, and the peripheral wall of the cover body is provided with an exhaust hole. A first fan blade connected with the driving shaft of the motor is arranged in the inside of the wind guide cover. An air inlet cover is installed outside the wind guide cover, and a second air inlet hole is formed in the middle part of the cover body of the air inlet cover. A second fan blade connected with the driving shaft of the motor is arranged in the inside of the air inlet cover. The end face of the cover body of the wind guide cover is fixedly provided with a wind guide wheel, and the wind guide wheel is provided with a wind guide channel communicated with the first air inlet hole.

[0003] There are some defects in the patent disclosure. When the heat dissipation fan installed on the motor shaft rotates, a negative pressure area is generated at the outer diameter of the heat dissipation fan blade. Under the action of the negative pressure, the hot air flowing out of the heat dissipation fan blade flows back to the motor cavity again, resulting in a short circuit of the heat dissipation fan. The local temperature of the motor rises, and the upper limit of the power cannot be too high. The shaft seal between the first fan blade and the motor cavity is sealed by a simple T-shaped structure. This structure has general sealing effect on dust and water, which affects the service life and safety of the fan. SUMMARY

[0004] The utility model discloses in view of above technical problem, and provides a dry and wet dual -purpose dust -collecting fan, and the dust -collecting fan is with high -power operation, and the heat dissipation fan blade is inhaled after rotating the outside air into the back cover, and the heat dissipation of the driver and the coil group is guaranteed, and the stable work of the fan is guaranteed.

[0005] The utility model discloses the technical scheme in the above technical problem is adopted: a dry and wet dual -purpose dust -collecting fan, including front support, frame shell, frame inner shell, the rear part of frame shell is equipped with rear air baffle, and rear air baffle is connected with frame shell, and is equipped with driver and drive heat dissipation plate in rear air baffle, and rear air baffle is equipped with heat dissipation air inlet hole;Frame shell is connected with frame inner shell, and the inner wall of frame inner shell is equipped with the stator core that coil is wound, and the inside of frame inner shell is equipped with motor shaft, and is equipped with rotor core on motor shaft, and is equipped with the magnetic steel that is coupled with stator core on rotor core;Frame inner shell front part is equipped with heat dissipation wind ring, and heat dissipation wind ring is connected with frame inner shell front part, and heat dissipation wind ring is equipped with heat dissipation air inlet, and the rear part of front support is made into the inwardly recessed flow guide part and the flow blocking part that surrounds flow guide part, and is equipped with heat dissipation fan blade between heat dissipation wind ring and flow guide part, and heat dissipation fan blade is connected with motor shaft, and is equipped with heat dissipation air outlet between flow guide part and flow blocking part.

[0006] To optimize the above technical scheme, the utility model further includes the following improved technical scheme.

[0007] The aforementioned front support is provided with a second impeller at the front, which is connected to the motor shaft. A guide shroud is provided outside the second impeller and is connected to the front support. The guide shroud is provided with a second air inlet and an exhaust shroud on the side. A guide wheel is provided at the front of the guide shroud, and a first impeller is provided in front of the guide wheel. The first impeller is connected to the motor shaft. A front shroud is provided outside the first impeller and is connected to the guide shroud. A first air inlet is provided at the front of the shroud.

[0008] The first and second impellers described above have the same number of blades and the same distribution position, and the curvature of the blades is also consistent.

[0009] The aforementioned air guide cover forms a bend between the front part and the rear part of the front air cover, allowing airflow to pass through. The bend is an R-curve both above and below.

[0010] The aforementioned inner shell and front support of the frame are equipped with bearing chambers, and the two ends of the motor shaft are connected to bearings in the bearing chambers; the rear part of the inner shell of the frame is hollow.

[0011] A sealing gasket is provided between the aforementioned front support and the second impeller. A bushing for fixing the first and second impellers is provided at the front end of the motor shaft. A nut is provided at the front of the first impeller. The nut is installed on the motor shaft. A gasket is provided between the nut and the first impeller.

[0012] The aforementioned housing has a drive mounting bracket at the rear, which is connected to the housing by screws. The driver is connected to the drive mounting bracket, and the driver heat sink is located at the rear of the driver.

[0013] Compared with the prior art, the dry and wet dust collector of this utility model draws in external air through the heat dissipation air inlet of the rear fan cover by rotating the heat dissipation fan blades. The airflow passes through the drive heat dissipation plate and the wound stator iron core to dissipate heat, ensuring stable operation of the fan in dusty and water vapor environments and improving the service life of the fan. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0015] Figure 2 This is a cross-sectional view of this embodiment.

[0016] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0017] Figure 4 This is an exploded three-dimensional structural diagram of this embodiment. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0019] Figures 1 to 4It is structural schematic view of the utility model.

[0020] The figure marks are: rack shell 1, rear wind cover 2, heat dissipation air inlet hole 2a, drive mounting bracket 3, drive 4, drive heat dissipation plate 5, rack inner shell 6, motor shaft 7, bearing 8, stator core 9, upper framework 10, lower framework 11, rotor core 12, magnetic steel 13, heat dissipation air guide ring 14, heat dissipation air guide hole 14a, heat dissipation fan blade 15, front support 16, flow guide part 16a, flow blocking part 16b, heat dissipation air outlet 16c, second impeller 17, sealing gasket column 18, air guide cover 19, second air inlet hole 19a, exhaust hole 19b, air guide wheel 20, first impeller 21, gasket 22, nut 23, bushing 24, front wind cover 25, first air inlet hole 25a, curved channel 26.

[0021] As Figure 1 The utility model discloses a dry and wet dual-purpose dust collection fan, including front support 16, rack shell 1, rack inner shell 6. When dust collection fan high -power operation, heat dissipation fan blade 15 rotates and will outside air into rear wind cover 2 to drive 4 and the stator core 9 of wire winding heat dissipation, ensure that fan stable work.

[0022] As Figure 2 Rack shell 1 rear portion is covered with rear wind cover 2, and the rear portion of rear wind cover 2 is provided with heat dissipation air inlet hole 2a for air flow to enter. Rack shell 1 rear portion is provided with drive mounting bracket 3, drive 4 is installed in drive mounting bracket 3, and drive heat dissipation plate 5 is installed at the back of drive 4. When drive 4 works, the heat generated can be conducted to the aluminum drive heat dissipation plate 5, and the outer side of drive heat dissipation plate 5 is connected with drive mounting bracket 3.

[0023] Front support 16 is installed at the front of rack inner shell 6, and bearing chamber is formed on rack inner shell 6 and front support 16. Motor shaft 7 is installed in rack inner shell 6, and both ends of motor shaft 7 are connected with bearing 8 and are installed in bearing chamber. Rack shell 1 front portion is connected with rack inner shell 6, stator core 9 is installed in upper framework 10 and lower framework 11, and after wire winding process is completed according to design parameters, stator core 9 is assembled with the inner wall of rack inner shell 6. Rotor core 12 is installed on motor shaft 7, and magnetic steel 13 coupled with stator core 9 is installed on rotor core 12.

[0024] Stator core 9 wound with coil passes through regularly changed current, and stator core 9 generates induced magnetic field and acts on magnetic steel 13, and then drives magnetic steel 13 to drive motor shaft 7 to rotate.

[0025] As Figure 3 And Figure 4As shown, the rear part of the rack inner shell 6 is hollowed out to allow air flow, and the front part of the inner shell is provided with a heat dissipation air guide ring 14 having heat dissipation air guide holes 14a. The inner shell and the front support 16 are provided with a heat dissipation fan blade 15 mounted on the front end of the motor shaft 7. The rear part of the front support 16 has an inwardly recessed flow guide part 16a and a flow blocking part 16b installed around the flow guide part 16a. The gap between the flow guide part 16a and the flow blocking part 16b is provided with a heat dissipation air outlet 16c for air flow discharge. The flow guide part 16a guides the air flow discharge, and the flow blocking part 16b blocks the backflow of the discharged air to the heat dissipation fan blade 15 due to negative air pressure, thereby avoiding the short circuit of the heat dissipation air.

[0026] The motor shaft 7 drives the heat dissipation fan blade 15 to rotate, generating negative air pressure inside the shell, and the air outside the rear air cover 2 is sucked into the rear air cover 2 through the heat dissipation air inlet hole 2a. The airflow carries away the heat through the driving heat dissipation plate 5, and then cools the driver 4. The airflow flows downward along the inner wall of the rear air cover 2, and the airflow enters the rack inner shell 6 through the hollowed rear part of the rack inner shell 6. The airflow enters the heat dissipation fan blade 15 through the heat dissipation air guide holes 14a on the heat dissipation air guide ring 14, and then the airflow flows out through the heat dissipation air outlet 16c.

[0027] The front part of the front support 16 is provided with a second impeller 17 mounted on the motor shaft 7, and a sealing gasket column 18 is arranged between the front support 16 and the second impeller 17. The front support 16 and the second impeller 17 are connected by a labyrinth seal, which reduces the gap between the moving and static parts under the premise of safety, improves the sealing effect, solves the problem of corrosion of bearings 8, enameled wire and drive caused by the long-term use of existing fans due to the shaft sealing structure in dust and water vapor scenes, and improves the service life and safety reliability of the fan.

[0028] The second impeller 17 is provided with a wind guide cover 19 connected to the front support 16 at the rear part. The wind guide cover 19 is provided with a second air inlet hole 19a, and a plurality of outwardly inclined air outlet holes 19b are formed on the side edge of the wind guide cover 19. The front part of the wind guide cover 19 is provided with a wind guide wheel 20, and the front part of the wind guide wheel 20 is provided with a first impeller 21. The first impeller 21 is fixed on the motor shaft 7 by a gasket 22 and a nut 23. The front end of the motor shaft 7 is also provided with a bushing 24 for fixing the first impeller 21 and the second impeller 17, which ensures the stability of the first impeller 21 and the second impeller 17.

[0029] The first impeller 21 and the second impeller 17 are same in the number and distribution position of blades, and the curvature of the blades is kept consistent. Under the condition of ensuring the optimal equivalent expansion angle of the blade channel, the profile of the front cover plate and the blade of the impeller is obtained by simultaneously controlling the meridian velocity and the relative velocity along the blade direction in the flow channel of the impeller, so that the growth, separation, secondary flow development and stratification effect of the boundary layer in the flow channel are controlled, thereby reducing the flow loss.

[0030] The first impeller 21 is externally provided with a front wind cover 25, the rear part of the front wind cover 25 is connected with the front part of the guide wind cover 19, and the front part of the wind cover is provided with a first air inlet 25a. The curved channel 26 for the airflow to pass through is formed between the front part of the guide wind cover 19 and the rear part of the front wind cover 25, the curved channel 26 is an R arc upward and downward, and the airflow keeps constant velocity after passing through the curved channel 26, so that the smooth transition is realized and the airflow loss is reduced.

[0031] The motor shaft 7 drives the first impeller 21 and the second impeller 17 to rotate, the main airflow passes through the first air inlet 25a of the front wind cover 25, enters the first impeller 21, passes through the curved channel 26 to enter the guide wind cover 20, passes through the second air inlet 19a to enter the second impeller 17, and finally the main airflow is discharged from the air outlet 19b on the side of the guide wind cover 19.

[0032] The best embodiment of the utility model has been illustrated, and various changes or modifications made by those skilled in the art will not deviate from the scope of the utility model.

Claims

1. A wet and dry dust collection fan comprising a front support (16), a machine frame outer shell (1), a machine frame inner shell (6), characterized in that: The rear of the frame housing (1) is provided with a rear fan cover (2), which is connected to the frame housing (1). The rear fan cover (2) is provided with a driver (4) and a driver heat sink (5). The rear fan cover (2) is provided with a heat dissipation air inlet (2a). The frame housing (1) is connected to the frame inner housing (6). The inner wall of the frame inner housing is provided with a stator core (9) with a coil wound on it. The frame inner housing (6) is provided with a motor shaft (7). The motor shaft (7) is provided with a rotor core (12). The rotor core (12) is provided with a magnet (13) coupled to the stator core (9). The frame inner housing (6) A heat dissipation air guide ring (14) is provided at the front. The heat dissipation air guide ring (14) is connected to the front of the inner shell (6) of the frame. The heat dissipation air guide ring (14) is provided with heat dissipation air guide holes (14a). The rear of the front bracket (16) is provided with an inwardly recessed guide part (16a) and a baffle part (16b) surrounding the guide part (16a). A heat dissipation fan blade (15) is provided between the heat dissipation air guide ring (14) and the guide part (16a). The heat dissipation fan blade (15) is connected to the motor shaft (7). A heat dissipation air outlet (16c) is provided between the guide part (16a) and the baffle part (16b).

2. The wet / dry vacuum of claim 1, wherein: The front support (16) is provided with a second impeller (17) at the front. The second impeller (17) is connected to the motor shaft (7). The second impeller (17) is provided with a wind guide shroud (19) outside. The wind guide shroud (19) is connected to the front support (16). The wind guide shroud (19) is provided with a second air inlet (19a). The wind guide shroud (19) is provided with an exhaust hole (19b) on the side. The wind guide shroud (19) is provided with a wind guide wheel (20) at the front. The wind guide wheel (20) is provided with a first impeller (21) at the front. The first impeller (21) is connected to the motor shaft (7). The first impeller (21) is provided with a front wind shroud (25) outside. The front wind shroud (25) is connected to the wind guide shroud (19). The wind shroud is provided with a first air inlet (25a) at the front.

3. The wet / dry vacuum of claim 2, wherein: The first impeller (21) and the second impeller (17) have the same number of blades and the same distribution position, and the curvature of the blades is set in the same way.

4. The wet / dry vacuum of claim 3, wherein: The front part of the air guide shroud (19) and the rear part of the front air shroud (25) form a bend (26) for airflow to pass through, and the upper and lower parts of the bend (26) are both R-arcs.

5. The wet / dry vacuum of claim 4, wherein: The inner shell (6) of the frame and the front bracket (16) are provided with bearing chambers, and the two ends of the motor shaft (7) are connected to the bearings (8) in the bearing chambers; the rear part of the inner shell (6) of the frame is hollow.

6. The wet / dry vacuum of claim 5, wherein: A sealing gasket (18) is provided between the front support (16) and the second impeller (17). A bushing (24) for fixing the first impeller (21) and the second impeller (17) is provided at the front end of the motor shaft (7). A nut (23) is provided at the front of the first impeller (21). The nut (23) is installed on the motor shaft (7). A washer (22) is provided between the nut (23) and the first impeller (21).

7. The wet and dry dual-purpose vacuum cleaner fan according to claim 6, characterized in that: The rear of the frame housing (1) is provided with a drive mounting bracket (3), which is connected to the frame housing (1) by screws. The driver (4) is connected to the drive mounting bracket (3), and the drive heat sink (5) is located at the rear of the driver (4).

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