An adjustable front guide vane device for an axial flow cushion lift fan

Abstract

The present invention provides an adjustable front guide vane device of an axial flow lift fan, which is installed on the housing of the lift fan. The adjustable front guide vane device includes a hydraulic drive device, a plurality of flap shafts, a synchronous drive mechanism, an inner ring bearing assembly, a first outer ring bearing assembly, a second outer ring bearing assembly, an angle sensor, and a position sensor. Under the action of the hydraulic drive device, the adjustable front guide vane device of the present invention drives the flap shaft to rotate through the synchronous drive mechanism to adjust the angle of the flap shaft to control the air intake flow of the lift fan impeller. By adjusting the angle of the flap shaft, that is, adjusting the angle of the front guide vane, the direction and velocity distribution of the airflow entering the lift fan impeller can be changed, thereby improving the work efficiency of the impeller. Good air intake conditions can reduce the turbulence and vortex of the airflow in the impeller, reduce energy loss, and enable the axial flow lift fan to maintain a high efficiency under any different working conditions during actual operation.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, and in particular to an adjustable front guide vane device of an axial flow type cushion lift fan. Background Art

[0002] In the pad lift fan impeller, the front guide vane and the rear guide vane are designed to guide the fluid to the center of the blade and increase the impeller efficiency. The front guide vane is usually located at the suction end to guide the fluid to the center of the blade; the rear guide vane is usually located at the discharge end to discharge the fluid from the center of the blade. The design and installation position of the front guide vane and the rear guide vane have a great influence on the flow, pressure and efficiency of the impeller.

[0003] The guide vane device is one of the important components of the axial flow lift fan, and is located upstream of the rotor blades of the lift fan. During the actual operation of the axial flow lift fan, the working conditions of the lift fan may change, such as changes in pipeline resistance, changes in gas flow demand, etc. The changes in working conditions will bring various different operating problems, affecting the operating efficiency of the lift fan; the reason for this type of operating condition change is mostly due to problems with the angle of the guide vane. The untimely adjustment of the guide vane angle leads to uneven and unstable distribution of the direction and speed of the airflow entering the fan impeller. Most of the guide vanes of the existing guide vane devices are fixed, and the angle of the guide vanes cannot be adjusted. It is impossible to adjust the direction and speed of the airflow according to the actual operation of the lift fan, which makes the lift fan unable to maintain stable operation under various working conditions. Therefore, in order to achieve that the lift fan can maintain a high operating efficiency under different working conditions, it is necessary to provide an adjustable guide vane device that can adjust the angle of the guide vane. Summary of the invention

[0004] The technical problem to be solved by the present invention is to solve the technical problem raised in the above-mentioned background technology, and to provide an adjustable front guide vane device for an axial flow cushion lift fan.

[0005] The present invention solves the above technical problems through the following technical solutions: In a first aspect, the present invention provides an adjustable front guide vane device for an axial flow cushion lift fan. The adjustable front guide vane device comprises a hydraulic drive device, a plurality of flap shafts, a synchronous drive mechanism, an inner ring bearing assembly, a first outer ring bearing assembly, a second outer ring bearing assembly, an angle sensor, and a position sensor; The inner ring bearing assembly is installed on the housing, one end of the synchronization mechanism is connected to the inner ring bearing assembly through the flap shaft, and the other end is connected to the hydraulic drive device, the first outer ring bearing assembly and the second outer ring bearing assembly are respectively installed at both ends of the synchronization drive mechanism; the angle sensor and the position sensor are respectively installed at the outer ends of the flap shaft.

[0006] Preferably, the synchronous transmission mechanism comprises a long rotating shaft, a long rotating shaft rocker arm and a plurality of adjustable connecting rods; The long rotating shaft is connected to the flap shaft, and the first outer ring bearing assembly and the second outer ring bearing assembly are respectively installed at both ends of the long rotating shaft; the long rotating shaft rocker arm is installed on the long rotating shaft through a flat key; the adjustable connecting rod is installed between two adjacent flap shafts.

[0007] Preferably, the synchronization mechanism further includes a first short rotating shaft, a second short rotating shaft and a short rotating shaft rocker arm; The first short rotating shaft is installed on the flap shaft, and the first outer ring bearing assembly and the second outer ring bearing assembly are installed at two ends of the first short rotating shaft respectively; the short rotating shaft rocker arm is installed on the first short rotating shaft through a flat key; The second short rotating shaft is used to connect the angle sensor and the position sensor to the flap shaft respectively.

[0008] Preferably, the first outer ring bearing assembly includes a first outer ring bearing seat, a first outer ring bearing, and a first outer ring sealing seat, wherein the first outer ring bearing seat is used to install the first outer ring bearing, the first outer ring sealing seat is inserted into the first outer ring bearing seat to press the first outer ring bearing, and a sealing ring is plugged in the first outer ring sealing seat.

[0009] Preferably, the second outer ring bearing assembly includes a second outer ring bearing seat, an outer ring end cover, and a second outer ring bearing, wherein the second outer ring bearing seat is used to install the second outer ring bearing, and the outer ring end cover is installed outside the second outer ring bearing seat to resist the second outer ring bearing.

[0010] Preferably, the inner ring bearing assembly comprises an inner ring bearing seat, an inner ring end cover, and an inner ring bearing; The inner ring bearing seat is installed on the guide plate, the guide plate is arranged on the shell, the inner ring bearing is installed in the inner ring bearing seat, and the inner ring end cover is installed on the inner ring bearing seat; the inner ring bearing is connected to the flap; a sealing ring is provided in the installation gap between the inner ring bearing and the inner ring bearing seat.

[0011] Preferably, the inner ring bearing assembly is connected to the guide tube of the guide plate through a base below the inner ring bearing seat.

[0012] Preferably, the hydraulic drive device includes a hydraulic pump station and an electrical control box; the hydraulic pump station includes a cylinder and a cylinder base.

[0013] The positive and progressive effect of the present invention is that the present invention provides an adjustable front guide vane device of an axial flow lift fan, which is installed on the housing of the lift fan, and the adjustable front guide vane device includes a hydraulic drive device, a plurality of flap shafts, a synchronous drive mechanism, an inner ring bearing assembly, a first outer ring bearing assembly, a second outer ring bearing assembly, an angle sensor, and a position sensor. Under the action of the hydraulic drive device, the adjustable front guide vane device of the present invention drives the flap shaft to rotate through the synchronous drive mechanism to adjust the angle of the flap shaft to control the intake flow of the lift fan impeller. By adjusting the angle of the flap shaft, that is, adjusting the front guide vane angle, the direction and velocity distribution of the airflow entering the lift fan impeller can be changed to make it more in line with the design requirements of the impeller, thereby improving the work efficiency of the impeller. Good intake conditions can reduce the turbulence and vortex of the airflow in the impeller, reduce energy loss, so that the axial flow lift fan can maintain a high efficiency under any different working conditions in actual operation, maintain stable operation under a wider range of operating conditions, and reduce vibration, noise and other problems caused by unstable factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the top view of the adjustable front guide vane device of Example 1 of the present invention.

[0015] Figure 2 This is a schematic structural diagram of the adjustable front guide vane device of Example 1 of the present invention.

[0016] Figure 3 This is a schematic structural diagram of the long rotating shaft portion of Example 1 of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of the adjustable connecting rod according to Example 1 of the present invention.

[0018] Figure 5 This is a schematic structural diagram of the first short rotating shaft portion of Example 1 of the present invention.

[0019] Figure 6 This is a schematic structural diagram of the inner ring bearing assembly of Example 1 of the present invention.

[0020] Figure 7 This is a schematic structural diagram of the first outer ring bearing assembly of Example 1 of the present invention.

[0021] Figure 8 This is a schematic structural diagram of the second outer ring bearing assembly of Example 1 of the present invention.

[0022] Legend: 1. flap shaft; 2. inner ring bearing assembly; 3. first outer ring bearing assembly; 4. second outer ring bearing assembly; 5. angle sensor; 6. position sensor; 7. hydraulic drive device; 8. long shaft; 9. long shaft rocker arm; 10. adjustable connecting rod; 11. flat key; 12. first short shaft; 13. short shaft rocker arm; 31. first outer ring bearing seat; 32. first outer ring bearing; 33. first outer ring sealing seat; 41. second outer ring bearing seat; 42. outer ring end cover; 43. second outer ring bearing; 21. inner ring bearing seat; 22. inner ring end cover; 23. inner ring bearing; 24. sealing ring; DETAILED DESCRIPTION

[0023] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0024] Example 1 like Figure 1-2 As shown, this embodiment provides an adjustable front guide vane device for an axial flow lift fan. The adjustable front guide vane device is installed on the housing of the lift fan, and specifically includes a hydraulic drive device 7, a plurality of flap shafts 1, a synchronous drive mechanism, an inner ring bearing assembly 2, a first outer ring bearing assembly 3, a second outer ring bearing assembly 4, an angle sensor 5, and a position sensor 6; the inner ring bearing assembly 2 is installed on the housing, one end of the synchronous mechanism is connected to the inner ring bearing assembly 2 through the flap shaft 1, and the other end is connected to the hydraulic drive device 7, the first outer ring bearing assembly 3 and the second outer ring bearing assembly 4 are respectively installed at both ends of the synchronous drive mechanism; the angle sensor 5 and the position sensor 6 are respectively installed at the outer end of the flap shaft 1. The adjustable front guide vane device of this embodiment is driven by the synchronous drive mechanism to rotate the flap shaft 1 under the action of the hydraulic drive device 7 to adjust the angle of the flap shaft 1 to control the air intake flow of the lift fan impeller, that is, adjusting the front guide vane angle can change the airflow direction and velocity distribution entering the lift fan impeller, so that it is more in line with the design requirements of the impeller, thereby improving the work efficiency of the impeller. Good air intake conditions can reduce the turbulence and swirl of the airflow in the impeller, reduce energy loss, and enable the axial flow pad lift fan to maintain high efficiency under any different working conditions in actual operation. like Figure 3-4 As shown, as an optional embodiment, the synchronous transmission mechanism includes a long rotating shaft 8, a long rotating shaft rocker arm 9 and a plurality of adjustable connecting rods 10; the long rotating shaft 8 is connected to the flap shaft 1, and the first outer ring bearing assembly 3 and the second outer ring bearing assembly 4 are respectively installed at both ends of the long rotating shaft 8; the long rotating shaft rocker arm 9 is installed on the long rotating shaft 8 through a flat key 11; the adjustable connecting rod 10 is installed between two adjacent flap shafts 1.

[0025] like Figure 5As shown, as an optional embodiment, the synchronization mechanism also includes a first short rotating shaft 12, a second short rotating shaft and a short rotating shaft rocker arm 13; the first short rotating shaft 12 is installed on the flap shaft 1, and the first outer ring bearing assembly 3 and the second outer ring bearing assembly 4 are respectively installed at both ends of the first short rotating shaft 12; the short rotating shaft rocker arm 13 is installed on the first short rotating shaft 12 through a flat key 11; the second short rotating shaft is used to connect the angle sensor 5 and the position sensor 6 to the flap shaft 1 respectively.

[0026] like Figure 7 As shown, in this embodiment, the first outer ring bearing assembly 3 includes a first outer ring bearing seat 31, a first outer ring bearing 32, and a first outer ring sealing seat 33. The first outer ring bearing seat 31 is used to install the first outer ring bearing 32. The first outer ring sealing seat 33 is inserted into the first outer ring bearing seat 31 to press the first outer ring bearing 32. The first outer ring sealing seat 33 is plugged with a sealing ring 24.

[0027] like Figure 8 As shown, in this embodiment, the second outer ring bearing assembly 4 includes a second outer ring bearing seat 41, an outer ring end cover 42, and a second outer ring bearing 43. The second outer ring bearing seat 41 is used to install the second outer ring bearing 43, and the outer ring end cover 42 is installed outside the second outer ring bearing seat 41 to resist the second outer ring bearing 43.

[0028] like Figure 6 As shown, in this embodiment, the inner ring bearing assembly 2 includes an inner ring bearing seat 21, an inner ring end cover 22, and an inner ring bearing 23; the inner ring bearing seat 21 is installed on the guide plate, the inner ring bearing assembly 2 is connected to the guide tube of the guide plate through the lower base of the inner ring bearing seat, the guide plate is arranged on the shell, the inner ring bearing 23 is installed in the inner ring bearing seat 21, and the inner ring end cover 22 is installed on the inner ring bearing seat 21; the inner ring bearing 23 is connected to the flap shaft 1; a sealing ring 24 is provided in the installation gap between the inner ring bearing 23 and the inner ring bearing seat 21.

[0029] As an optional embodiment, the hydraulic drive device includes a hydraulic pump station and an electrical control box; the hydraulic pump station includes an oil cylinder and an oil cylinder base. The hydraulic drive device is a companion test device for the adjustable front guide vane device. The hydraulic pump station of the device can provide hydraulic power to the oil cylinder, and the electrical control box can control the movement of the hydraulic oil cylinder and receive the signals transmitted by the angle sensor 5 and the position sensor 6, and provide them to the synchronous drive mechanism, thereby driving the angle rotation of the flap shaft 1 to control the intake flow of the pad lift fan impeller.

[0030] In this embodiment, when the flap shaft 1 is fully open, the fan flow is large and the pressure head is high, which can make the hovercraft rise normally; when it is moved away, the fan flow is small and the pressure head is low, and it is in the warm-up and acceleration process; when it is closed, it can protect the lifting fan and prevent impurities from entering the fan.

[0031] In the present embodiment, an adjustable guide vane device of an axial flow lift fan is provided. Under the action of a hydraulic drive device, the adjustable guide vane device of the axial flow lift fan drives the rotation of the flap shaft through a synchronous drive mechanism to adjust the angle of the flap shaft to control the air intake flow of the lift fan impeller. By adjusting the angle of the flap shaft, that is, adjusting the angle of the guide vane, the direction and velocity distribution of the airflow entering the lift fan impeller can be changed to make it more in line with the design requirements of the impeller, thereby improving the work efficiency of the impeller. Good air intake conditions can reduce the turbulence and vortex of the airflow in the impeller, reduce energy loss, and enable the axial flow lift fan to maintain a high efficiency under any different working conditions in actual operation, maintain stable operation under a wider range of operating conditions, and reduce vibration, noise and other problems caused by unstable factors. In addition, an unstable phenomenon may occur in the axial flow lift fan under certain working conditions, which will cause serious damage to the lift fan. By adjusting the angle of the guide vane, the air intake characteristics of the fan can be changed, so that the surge boundary of the fan moves toward lower flow or higher pressure, thereby effectively avoiding or reducing the occurrence of surge.

[0032] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An adjustable front guide vane device of an axial flow lift fan, mounted on a housing of the lift fan, characterized in that: The adjustable front guide vane device includes a hydraulic drive device, a plurality of flap shafts, a synchronous drive mechanism, an inner ring bearing assembly, a first outer ring bearing assembly, a second outer ring bearing assembly, an angle sensor, and a position sensor; The inner ring bearing assembly is installed on the housing, one end of the synchronization mechanism is connected to the inner ring bearing assembly through the flap shaft, and the other end is connected to the hydraulic drive device, the first outer ring bearing assembly and the second outer ring bearing assembly are respectively installed at both ends of the synchronization drive mechanism; the angle sensor and the position sensor are respectively installed at the outer ends of the flap shaft.

2. The adjustable front guide vane device of the axial flow lift fan according to claim 1, characterized in that: The synchronous transmission mechanism includes a long rotating shaft, a long rotating shaft rocker arm and a plurality of adjustable connecting rods; The long rotating shaft is connected to the flap shaft, and the first outer ring bearing assembly and the second outer ring bearing assembly are respectively installed at both ends of the long rotating shaft; the long rotating shaft rocker arm is installed on the long rotating shaft through a flat key; the adjustable connecting rod is installed between two adjacent flap shafts.

3. The adjustable front guide vane device of the axial flow lift fan according to claim 2, characterized in that: The synchronization mechanism also includes a first short rotating shaft, a second short rotating shaft and a short rotating shaft rocker arm; The first short rotating shaft is installed on the flap shaft, and the first outer ring bearing assembly and the second outer ring bearing assembly are installed at two ends of the first short rotating shaft respectively; the short rotating shaft rocker arm is installed on the first short rotating shaft through a flat key; The second short rotating shaft is used to connect the angle sensor and the position sensor to the flap shaft respectively.

4. The adjustable front guide vane device of the axial flow lift fan according to claim 1, characterized in that: The first outer ring bearing assembly includes a first outer ring bearing seat, a first outer ring bearing, and a first outer ring sealing seat. The first outer ring bearing seat is used to install the first outer ring bearing. The first outer ring sealing seat is inserted into the first outer ring bearing seat to press the first outer ring bearing. A sealing ring is plugged in the first outer ring sealing seat.

5. The adjustable front guide vane device of the axial flow lift fan according to claim 1, characterized in that: The second outer ring bearing assembly includes a second outer ring bearing seat, an outer ring end cover, and a second outer ring bearing. The second outer ring bearing seat is used to install the second outer ring bearing. The outer ring end cover is installed outside the second outer ring bearing seat to support the second outer ring bearing.

6. The adjustable front guide vane device of the axial flow lift fan according to claim 1, characterized in that: The inner ring bearing assembly comprises an inner ring bearing seat, an inner ring end cover, and an inner ring bearing; The inner ring bearing seat is installed on the guide plate, the guide plate is arranged on the shell, the inner ring bearing is installed in the inner ring bearing seat, and the inner ring end cover is installed on the inner ring bearing seat; the inner ring bearing is connected to the flap; a sealing ring is provided in the installation gap between the inner ring bearing and the inner ring bearing seat.

7. The adjustable front guide vane device of the axial flow lift fan according to claim 6, characterized in that: The inner ring bearing assembly is connected to the guide tube of the guide plate through the lower base of the inner ring bearing seat.

8. The adjustable front guide vane device of the axial flow lift fan according to claim 1, characterized in that: The hydraulic drive device comprises a hydraulic pump station and an electrical control box; the hydraulic pump station comprises an oil cylinder and an oil cylinder base.

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