Coaxial counter-rotating fog gun fan

Abstract

The invention discloses a coaxial reverse rotation fog gun fan in the technical field of environmental protection equipment. The coaxial reverse rotation fog gun fan comprises a forward rotation impeller, a reverse rotation impeller, a motor, a transmission mechanism and a connecting support. The forward rotation impeller and the reverse rotation impeller are coaxially arranged, the motor is used for driving the transmission mechanism, and the transmission mechanism and the transmission mechanism are installed in the barrel through the connecting support. According to the fog gun fan, gear meshing and synchronous belt wheel transmission modes are adopted, so that the forward-rotating impeller and the reverse-rotating impeller rotate on the same axis at a high speed, secondary energy loss caused by vortex of airflow and impact on a flow guide plate is avoided, and compared with a fog gun fan with two stages of impellers in the same rotating direction, the fog gun fan has the advantages that the structure is simple; under the same rotating speed, the fog gun fan with the coaxial shaft counter-rotating impeller structure is stronger in outlet airflow and high in efficiency, the noise generated by the airflow is reduced, the air volume and the air pressure are improved, and the range of a fog gun is increased.

Description

Technical Field

[0001] The invention relates to a coaxial counter-rotating fog cannon fan, belonging to the technical field of environmental protection equipment. Background Art

[0002] Dust suppression vehicles are widely used in urban roads, open-pit mines, construction sites, mineral storage yards, port terminals and other areas with large dust. They are also used for pest control in landscaping and large-scale sterilization and disinfection operations after natural disasters. The fog cannon fan is a key component of the dust suppression vehicle. The high-pressure water atomization effect and water mist spraying distance of the fog cannon fan outlet are related to the fog cannon axial flow fan impeller. In actual applications, in order to obtain a large range, the fog cannon fan will use multiple sets of impellers with the same rotation direction to increase the air volume and air pressure, thereby increasing the range of the fog cannon.

[0003] Most of the existing large-range dust suppression vehicle fog cannon fans use double impellers, which are installed in series on the drive shaft in the same direction of rotation. The motor drives the two-stage impellers to rotate in one direction at the same time. During operation, the fog cannon fan makes a lot of noise, and the double blades stir the airflow in the same direction. The airflow fluctuates significantly at the outlet of the fog cannon fan, and the air volume and air pressure at the outlet are inefficient, spraying out water mist with obvious fluctuations, affecting the range. The gyroscopic directional force generated by the impeller rotating in one direction affects the continuity of the automatic cycle of the fog cannon fan up and down and left and right. At the same time, the fog cannon machine is not synchronized with the dust suppression vehicle when swinging up and down and left and right on uneven roads, which can easily cause the impeller to rub and break, and the wind tube to deform, affecting the operation of the dust suppression vehicle. In order to overcome the gyroscopic directional force generated by the impeller rotating in one direction, the overall rigidity of the fog cannon fan needs to be strengthened, which cannot achieve lightweight mechanical products.

[0004] Therefore, a coaxial counter-rotating fog cannon fan is proposed. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to solve the problems in the market that the existing dust suppression vehicle fog cannon has unstable air output, fluctuating water mist and large gyroscopic directional force.

[0006] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions: A coaxial reverse-rotation fog cannon blower is provided, comprising: a cylinder formed by a wind tube and a guide cover, a guide column installed at the axis of the cylinder, a guide blade installed on the surface of the guide column, and a circular nozzle installed at one end of the guide cover; and further comprising: A positive rotation impeller, a counter-rotation impeller, a motor, a transmission mechanism and a connecting support are arranged in the wind tube; the positive rotation impeller and the counter-rotation impeller are arranged coaxially, the motor is used to drive the transmission mechanism, and the transmission mechanism is installed in the cylinder through the connecting support and the transmission mechanism; Among them, the transmission mechanism is internally provided with a first gear, a second gear and a synchronous belt; the first gear and the second gear are meshed, and the motor drives the positive-rotating impeller and the counter-rotating impeller respectively through the meshing of the first gear and the second gear and the transmission action of the synchronous belt.

[0007] Furthermore, the transmission mechanism further comprises a fixing plate, a main shaft and an output shaft; the main shaft and the output shaft are both mounted on the first fixing plate; The first gear is fixedly connected to the main shaft coaxially, the second gear is fixedly connected to the output shaft coaxially, the first gear is meshed with the second gear; and the output shaft is fixedly connected to the positive-rotation impeller.

[0008] Furthermore, the transmission mechanism also includes a synchronous belt, a first pulley, a second pulley, a synchronous belt and an output sleeve shaft; The first pulley is fixedly connected to the main shaft coaxially, the second pulley is arranged coaxially with the output shaft, and the first pulley and the second pulley rotate synchronously through the synchronous belt; an output sleeve shaft is provided on the surface of the output shaft, and the output sleeve shaft is rotatably connected to the output shaft; The second pulley and the output sleeve shaft are coaxially fixedly connected.

[0009] Furthermore, the transmission mechanism also includes a second fixing plate, the second fixing plate is arranged in parallel with the first fixing plate, and the second fixing plate is close to the counter-rotating impeller.

[0010] Furthermore, both ends of the output shaft and the main shaft are installed between the first fixing plate and the second fixing plate through bearings.

[0011] Furthermore, the blades of the forward-rotating impeller and the blades of the reverse-rotating impeller are arranged alternately.

[0012] Furthermore, the fixed connection methods all use flat keys for connection.

[0013] Furthermore, a sound-absorbing plate is provided on the inner wall of the air duct.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts gear meshing and synchronous belt drive to enable the forward-rotating impeller and the reverse-rotating impeller to rotate at high speed on one axis, thereby avoiding the secondary energy loss caused by the vortex of the airflow and the impact of the guide plate. Compared with the fog cannon fan with two-stage impellers of the same rotation direction, the fog cannon fan with a coaxial counter-rotating impeller structure has a stronger outlet airflow and high efficiency at the same speed, reduces the noise generated by the airflow, increases the air volume and pressure, and increases the range of the fog cannon.

[0015] 2. The present invention increases the relative speed between the impellers and eliminates the gyroscopic effect of the impeller by designing a coaxial counter-rotating impeller structure with a forward-rotating impeller and a counter-rotating impeller, thereby reducing the overall vibration of the fog cannon blower, improving the safety of the blower, and extending the service life of the whole machine. After the impeller rotates clockwise and counterclockwise to eliminate the gyroscopic effect of the impeller, the fog cannon blower's automatic up and down and left and right cycle work continuity and the ability to cope with the impact force generated by the dust suppression vehicle swinging up and down and left and right on uneven roads are significantly enhanced, avoiding the impeller from being rubbed and broken due to the gyroscopic effect during operation, and also avoiding the deformation of the wind tube due to the impact force, thereby improving the working safety and reliability of the dust suppression vehicle. After the fog cannon blower eliminates the gyroscopic directional force generated by the gyroscopic effect of the impeller, the overall structure of the fog cannon blower can be designed to be lightweight to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is an internal schematic diagram of the present invention; Figure 2 Shown is a schematic diagram of the transmission mechanism structure of the present invention; Figure 3 Shown is a schematic diagram of the arrangement structure of the forward-rotating impeller and the reverse-rotating impeller of the present invention.

[0017] Reference numerals: 1. Positive-rotation impeller; 2. Counter-rotation impeller; 3. Motor; 4. Transmission mechanism; 5. Protection net; 6. Air cylinder; 7. Connecting support; 8. Air guide cover; 9. Air guide column; 10. Air guide blade; 11. Annular nozzle; 12. Silencer; 4-1. First fixing plate; 4-2. Output shaft; 4-3. Second gear; 4-4. Synchronous belt; 4-5. Second pulley; 4-6. Output sleeve shaft; 4-7. Main shaft; 4-8. First gear; 4-9. First pulley; 4- 10. Second fixing plate; 4-11. First spacer; 4-12. First bearing; 4-13. Second bearing; 4-14. First flat key; 4-15. Second spacer; 4-16. Third bearing; 4-17. Third spacer; 4-18. Fourth bearing; 4-19. Second flat key; 4-20. Third flat key; 4-21. Fourth flat key; 4-22. Fifth flat key; 4-23. Sixth flat key; 4-24. Fourth spacer; 4-25. Fifth bearing. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Embodiment 1:

[0020] like Figure 1 and Figure 2 As shown, a coaxial reverse-rotating fog cannon fan is provided, comprising: A positive-rotation impeller 1, a counter-rotation impeller 2, a motor 3, a transmission mechanism 4 and a connecting support 7; the positive-rotation impeller and the counter-rotation impeller are arranged coaxially, the motor 3 is used to drive the transmission mechanism 4, and the transmission mechanism 4 is installed in the cylinder through the connecting support 7 and the transmission mechanism 4.

[0021] The transmission mechanism 4 also includes a fixed plate, a main shaft 4-7 and an output shaft 4-2; the main shaft 4-7 and the output shaft 4-2 are both mounted on the first fixed plate 4-1; The motor 3 is used to provide continuous and stable driving force under the fixation of the first fixed plate 4-1. At the same time, under the fixation of the first fixed plate 4-1 and the second fixed plate 4-10, the main shaft 4-7 and the output shaft 4-2 can be fixed by bearings, and then rotate relative to the first fixed plate 4-1 and the second fixed plate 4-10. The positive-rotation impeller 1 receives the rotational force from the output shaft 4-2, and the reverse-rotation impeller 2 receives the rotational force from the main shaft 4-7, thereby realizing reversal.

[0022] The transmission mechanism 4 is internally provided with a first gear 4-8, a second gear 4-3 and a synchronous belt 4-4; the first gear 4-8 and the second gear 4-3 are meshed, and the rotational force provided by the motor 3 drives the first gear 4-8 and the second gear 4-3 to mesh and rotate, thereby providing the forward-rotating impeller 1 with the motor 3 to rotate in the opposite direction; the synchronous belt 4-4 rotates synchronously with the motor 3, thereby driving the reverse-rotating impeller 2 to rotate in the same direction as the motor 3.

[0023] The first gear 4-8 is fixedly connected to the main shaft 4-7 coaxially, the second gear 4-3 is fixedly connected to the output shaft 4-2 coaxially, the first gear 4-8 and the second gear 4-3 are meshed; the output shaft 4-2 is fixedly connected to the positive-rotation impeller 1.

[0024] The transmission mechanism 4 also includes a synchronous belt 4-4, a first pulley 4-9, a second pulley 4-5, a synchronous belt 4-4 and an output sleeve shaft 4-6.

[0025] The first pulley 4-9 is fixedly connected to the main shaft 4-7 coaxially, the second pulley 4-5 is arranged coaxially with the output shaft 4-2, the first pulley 4-9 and the second pulley 4-5 rotate synchronously through the synchronous belt 4-4; the surface of the output shaft 4-2 is provided with an output sleeve shaft 4-6, and the output sleeve shaft 4-6 is rotationally connected to the output shaft 4-2.

[0026] The second pulley 4-5 and the output sleeve shaft 4-6 are coaxially fixedly connected.

[0027] Since the main shaft 4-7 and the transmission shaft are not coaxial, reversal needs to be achieved. The first gear 4-8 and the second gear 4-3 are meshed with each other to achieve reversal, that is, the motor 3 drives the main shaft 4-7 to rotate, and the main shaft 4-7 drives the second gear 4-3 to rotate. Due to the meshing action, the first gear 4-8 and the second gear 4-3 rotate in the opposite direction. Since the first gear 4-8 and the output shaft 4-2 are fixedly connected, the first gear 4-8 drives the output shaft 4-2 to rotate in the opposite direction relative to the main shaft 4-7, thereby realizing the driving of the positive rotation impeller 1.

[0028] Since the main shaft 4-7 and the output shaft 4-2 have different rotation directions, the other end of the main shaft 4-7 is fixedly connected to the first pulley 4-9, and the outer wall of the output shaft 4-2 is sleeved with an output sleeve shaft 4-6, and the second pulley 4-5 is fixedly connected to the outer wall of the output sleeve shaft 4-6, and the output sleeve shaft 4-6 and the main shaft 4-7 are rotated synchronously through the synchronous belt 4-4, so that the output sleeve shaft 4-6 and the output shaft 4-2 rotate in the opposite direction, and the output sleeve shaft 4-6 is fixedly connected to the counter-rotation impeller 2; as a whole, the forward-rotation impeller 1 and the counter-rotation impeller 2 rotate in the opposite direction.

[0029] On the whole, the impellers rotate in one clockwise and one counterclockwise, which has the characteristic of transmitting reverse torque, allowing the fog cannon blower to work efficiently within the set speed range; at the same time, it increases the relative speed between the impellers, eliminates the impeller gyroscopic effect, reduces the overall vibration of the fog cannon blower, improves the safety of the blower, and extends the service life of the entire machine.

[0030] After the impeller's gyroscopic effect is eliminated by rotating the impeller clockwise and counterclockwise, the fog cannon fan's automatic up and down and left and right cycle work continuity and the ability to cope with the impact force generated by the dust suppression vehicle's up and down and left and right swings on uneven roads are significantly enhanced, avoiding the impeller from being rubbed and broken during operation due to the gyroscopic effect, and also avoiding the deformation of the wind tube 6 due to the impact force, thereby improving the working safety and reliability of the dust suppression vehicle. After the fog cannon fan eliminates the gyroscopic directional force generated by the impeller's gyroscopic effect, the overall structure of the fog cannon fan can be designed to be lightweight to a certain extent.

[0031] The transmission mechanism 4 includes a second fixing plate 4 - 10 , which is arranged in parallel with the first fixing plate 4 - 1 , and the second fixing plate 4 - 10 is close to the counter-rotation impeller 2 .

[0032] Through the second fixing plate 4-10, combined with the first fixing plate 4-1, the main shaft 4-7, the output shaft 4-2 and the motor 3 are fixed in a stable space, so that they can work stably inside the wind tube 6; both ends of the output shaft 4-2 and the main shaft 4-7 are installed between the first fixing plate 4-1 and the second fixing plate 4-10 through bearings.

[0033] like Figure 3 As shown, the blades of the forward-rotating impeller 1 and the blades of the counter-rotating impeller 2 are arranged alternately; and thus the blades of the first-stage impeller group are equivalent to the dynamic guide blades of the second-stage impeller group. When the fog cannon fan is working, the speeds of the adjacent impellers rotating in opposite directions change synchronously, and the circumferential speed of the airflow is offset, making the airflow more similar to a straight-line flow, and allowing the airflow to enter the fan guide tube assembly along a straight line, thereby avoiding the secondary energy loss caused by the vortex of the airflow and the impact of the guide plate. Compared with the fog cannon fan with two-stage impellers of the same rotation direction, the fog cannon fan with a coaxial counter-rotating impeller structure has a stronger outlet airflow and higher efficiency at the same speed, reduces the noise generated by the airflow, increases the air volume and pressure, and increases the range of the fog cannon.

[0034] The inner wall of the air duct 6 is provided with a silencer plate 12, which is simple to install, has low noise during operation, has a lighter structure weight than other air ducts of the same level, and has high mechanical efficiency. Embodiment 2:

[0035] like Figure 1 As shown, a coaxial counter-rotating fog cannon blower, based on the first embodiment, further includes a cylinder formed by a wind tube 6 and a guide cover 8, a guide column 9 installed at the axis of the cylinder, a guide blade 10 installed on the surface of the guide column 9 and an annular nozzle 11 installed at one end of the guide cover 8.

[0036] A protective net 5 is installed at one end of the air cylinder 6 to reduce the entry of dust.

[0037] Among them, the fixed connection method uses flat keys for connection, such as Figure 2As shown, the motor 3 is fixed on the first fixed plate 4-1 by bolts, the main shaft 4-7, the first gear 4-8 and the first pulley 4-9 are connected by flat keys, and the middle is separated by a spacer. The two ends of the main shaft 4-7 are respectively assembled with the first fixed plate 4-1 and the second fixed plate 4-10 through bearings; the second gear 4-3 and the output shaft 4-2 are connected by flat keys, one end of the output shaft 4-2 is assembled to the first fixed plate 4-1 through a bearing, and the output shaft 4-2 passes through the inside of the output sleeve shaft 4-6, and the two ends are assembled with bearings; the second pulley 4-5 is fixed to the output sleeve shaft 4-6 by a flat key, and the output sleeve shaft 4-6 and the second fixed plate 4-10 are assembled by bearings; the first pulley 4-9 and the second pulley 4-5 are driven by a synchronous belt 4-4.

[0038] like Figure 2 As shown, the flat keys in the figure include the first flat key 4-14, the second flat key 4-19, the third flat key 4-20, the fourth flat key 4-21, the fifth flat key 4-22 and the sixth flat key 4-23; all of which are used to provide fixed connection; the bearings in the figure include the first bearing 4-12, the second bearing 4-13, the third bearing 4-16, the fourth bearing 4-18 and the fifth bearing 4-25; all of which are used to reduce friction during rotation; the spacers in the figure include the first spacer 4-11, the second spacer 4-15, the third spacer 4-17 and the fourth spacer 4-24; they evenly reduce mechanical collision between structures.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A coaxial reverse-rotation fog cannon blower, comprising a cylinder formed by a wind tube (6) and a guide cover (8), a guide column (9) installed at the axis of the cylinder, a guide blade (10) installed on the surface of the guide column (9), and an annular nozzle (11) installed at one end of the guide cover (8); characterized in that: Also includes: A forward-rotating impeller (1), a reverse-rotating impeller (2), a motor (3), a transmission mechanism (4) and a connecting support (7) are arranged in the wind tube (6); the forward-rotating impeller (1) and the reverse-rotating impeller (2) are arranged coaxially, the motor (3) is used to drive the transmission mechanism (4), and the transmission mechanism (4) is installed in the cylinder body through the connecting support (7) and the transmission mechanism (4); The transmission mechanism (4) is provided with a first gear (4-8), a second gear (4-3) and a synchronous belt (4-4); the first gear (4-8) and the second gear (4-3) are meshed, and the motor (3) drives the positive-rotating impeller (1) and the counter-rotating impeller (2) respectively through the meshing of the first gear (4-8) and the second gear (4-3) and the transmission action of the synchronous belt (4-4).

2. The coaxial reverse-rotating fog cannon blower according to claim 1, characterized in that: The transmission mechanism (4) further comprises a first fixing plate (4-2), a main shaft (4-7) and an output shaft (4-2); the main shaft (4-7) passes through the first fixing plate (4-2); The first gear (4-8) is fixedly connected to the main shaft (4-7) coaxially, the second gear (4-3) is fixedly connected to the output shaft (4-2) coaxially, the first gear (4-8) and the second gear (4-3) are meshed; and the output shaft (4-2) is fixedly connected to the positive-rotation impeller (1).

3. The coaxial reverse-rotating fog cannon blower according to claim 2, characterized in that: The transmission mechanism (4) further comprises a synchronous belt (4-4), a first pulley (4-9), a second pulley (4-5), a synchronous belt (4-4) and an output sleeve shaft (4-6); The first pulley (4-9) is coaxially fixedly connected to the main shaft (4-7); the second pulley (4-5) and the output shaft (4-2) are coaxially arranged; the first pulley (4-9) and the second pulley (4-5) rotate synchronously via the synchronous belt (4-4); an output sleeve shaft (4-6) is provided on the surface of the output shaft (4-2); the output sleeve shaft (4-6) is rotatably connected to the output shaft (4-2); The second pulley (4-5) and the output sleeve shaft (4-6) are coaxially fixedly connected.

4. The coaxial reverse-rotating fog cannon blower according to claim 2, characterized in that: The transmission mechanism (4) further comprises a second fixing plate (4-10), the second fixing plate (4-10) and the first fixing plate (4-2) being arranged in parallel, and the second fixing plate (4-10) being close to the counter-rotating impeller (2).

5. The coaxial reverse-rotating fog cannon blower according to claim 2, characterized in that: Both ends of the output shaft (4-2) and the main shaft (4-7) are mounted between the first fixing plate (4-2) and the second fixing plate (4-10) via bearings.

6. The coaxial reverse-rotating fog cannon blower according to claim 1, characterized in that: The blades of the forward-rotating impeller (1) and the blades of the reverse-rotating impeller (2) are arranged in an alternating manner.

7. The coaxial reverse-rotating fog cannon blower according to claim 3, characterized in that: The fixed connection methods all use flat keys for connection.

8. The coaxial reverse-rotating fog cannon blower according to claim 1, characterized in that: The inner wall of the air cylinder (6) is provided with a sound-absorbing plate (12).

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