Automatic adjusting device for blade angle of counter-rotating fan

Abstract

The utility model provides a counter-rotating fan blade angle automatic adjusting device which comprises a first rim and a plurality of blades distributed on the periphery of the first rim, the blades are fixed on the first rim through rotating bearings, the bottoms of the blades are connected with radial rods, and the radial rods penetrate through the first rim and lead to the circle center position of the first rim; the sliding block is circular, the sliding block is located at the circle center of the first rim, a plurality of connecting rods are evenly arranged on the periphery of the sliding block, and the connecting rods are connected with the sliding block and the tail ends of the radial rods; a piston rod of the hydraulic cylinder is connected with the circle center position of the sliding block, and the hydraulic cylinder is used for pushing or pulling the sliding block in the axis direction; and the hydraulic station is used for controlling the hydraulic cylinder. The automatic adjusting device for the blade angle of the counter-rotating fan, provided by the utility model, realizes automatic adjustment of the blade angle, and is rapid in adjustment, high in efficiency, accurate in angle and good in effect.

Description

Technical Field

[0001] This utility model relates to the field of mining fan technology, and in particular to an automatic adjustment device for the blade angle of a counter-rotating fan. Background Technology

[0002] Driven by national policies, coal mines are continuously consolidating, large-scale coal mines are increasing, coal production is expanding, mining depth is extending, and coal seam gas content is rising. This has led to increasingly higher requirements for the diameter, safe and reliable operation, and automation of main ventilation fans in coal mines. Counter-rotating axial flow fans are a common type of such fan. By adjusting the rotation angle of the fan blades, the airflow can be adjusted to suit the specific conditions of the mine.

[0003] Currently, the blades of counter-rotating axial flow fans are primarily adjusted manually. The blades are typically secured with screws, and manual adjustment requires loosening the screws, adjusting the angle, and then tightening them again to re-secure them. Each blade must be adjusted manually in this way. This process is time-consuming, inefficient, and impacts production, and it's easy to forget or lose some blades. Furthermore, the adjustment angle of each blade is not always consistent due to human error, affecting normal operation and even shortening the fan's lifespan.

[0004] This invention provides an automatic adjustment device for the blade angle of a cyclone fan, which realizes automatic adjustment of the blade angle, with rapid adjustment, high efficiency, accurate angle, and good effect. Utility Model Content

[0005] This invention provides an automatic adjustment device for the blade angle of a cyclone fan, enabling automatic adjustment of the blade angle.

[0006] This utility model provides an automatic adjustment device for the blade angle of a cyclone fan, comprising: a first wheel ring, with multiple blades distributed on the outer periphery of the first wheel ring, the blades being fixed to the first wheel ring by a rotary bearing, the bottom of the blades being connected to a radial rod, the radial rod passing through the first wheel ring and leading to the center of the first wheel ring; a slider, the slider being circular, the slider being located at the center of the first wheel ring, with multiple connecting rods evenly arranged on the outer periphery of the slider, the connecting rods being connected to the slider and connected to the end of the radial rod; a hydraulic cylinder, the piston rod of the hydraulic cylinder being connected to the center of the slider, the hydraulic cylinder being used to push or pull the slider in the axial direction; and a hydraulic station, the hydraulic station controlling the hydraulic cylinder.

[0007] Furthermore, the automatic adjustment device for the blade angle of the cyclone fan also includes a second wheel ring, the center of which is the same as the center of the first wheel ring. The second wheel ring and the first wheel ring are located on the same plane, and the second wheel ring is located between the slider and the first wheel ring. A radial rod passes through the second wheel ring and is fixed to the second wheel ring by a pressure bearing.

[0008] Furthermore, the slider is a polytetrafluoroethylene slider.

[0009] Furthermore, the connecting rod is hinged to the slider and the end of the radial rod is hinged.

[0010] The automatic blade angle adjustment device for cyclone fans provided by this utility model realizes automatic adjustment of blade angle, which is fast, efficient, accurate and effective. Attached Figure Description

[0011] Figure 1 The diagram shown is a schematic representation of the overall structure of the automatic adjustment device for the blade angle of a cyclone fan according to an embodiment of this utility model.

[0012] Figure 2 The diagram shown is a detailed structural schematic of the automatic adjustment device for the blade angle of a cyclone fan according to an embodiment of the present invention.

[0013] Figure 3 The figure shown is a cross-sectional structural schematic diagram of the automatic adjustment device for the blade angle of a cyclone fan according to an embodiment of the present invention.

[0014] Figure label:

[0015] 1: Blade; 11: Radial rod; 2: Slider; 21: Connecting rod; 3: First wheel rim; 31: Rotary bearing; 4: Second wheel rim; 41: Pressure bearing; 5: Hydraulic cylinder; 6: Hydraulic station; 7: Welded hub. Detailed Implementation

[0016] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0017] Figure 1 The diagram shown is a schematic representation of the overall structure of the automatic adjustment device for the blade angle of a cyclone fan according to an embodiment of this utility model. Figure 2 The diagram shown is a detailed structural schematic of the automatic adjustment device for the blade angle of a cyclone fan according to an embodiment of the present invention. Figure 3 The figure shown is a cross-sectional structural schematic diagram of the automatic adjustment device for the blade angle of a cyclone fan according to an embodiment of the present invention.

[0018] like Figure 1 , Figure 2 and Figure 3As shown, this utility model embodiment provides an automatic adjustment device 100 for the blade angle of a cyclone fan, comprising: a first wheel ring 3, with multiple blades 1 distributed on the outer periphery of the first wheel ring 3, the blades 1 being fixed on the first wheel ring 3 by a rotary bearing 31, the bottom of the blades 1 being connected to a radial rod 11, the radial rod 11 passing through the first wheel ring 3 and leading to the center position of the first wheel ring 3; a slider 2, the slider 2 being a circular polytetrafluoroethylene slider, the slider 2 being located at the center position of the first wheel ring 3, with multiple connecting rods 21 evenly arranged on the outer periphery of the slider 2, the connecting rods 21 being hinged to the slider 2 and connected or hinged to the end of the radial rod 11; a hydraulic cylinder 5, the piston rod of the hydraulic cylinder 5 being connected to the center position of the slider 2, the hydraulic cylinder 5 being used to push or pull the slider 2 in the axial direction; and a hydraulic station 6, the hydraulic station 6 controlling the hydraulic cylinder 5.

[0019] Reference Figure 2 When adjusting the angle of blade 1, hydraulic cylinder 5 pushes or pulls slider 2 along the axial direction. Slider 2 drives connecting rod 21, which in turn drives radial rod 11 to rotate, thereby rotating blade 1 and achieving automatic angle adjustment. In this embodiment, adjusting the blade angle only requires operation at the hydraulic station, allowing for simultaneous and uniform angle adjustment of all blades, eliminating the need for manual adjustment. The angle adjustment is accurate and consistent, simple and fast, and can be automated. By adjusting the blade angle, the airflow can be adjusted to meet the ventilation needs of various mine conditions, improving the adaptability of the fan.

[0020] When the fan is running, the hydraulic cylinder rotates with the fan; when it is necessary to adjust the blade angle, the hydraulic cylinder is connected to the hydraulic station for angle adjustment.

[0021] like Figure 1 and Figure 2 As shown, the automatic blade angle adjustment device 100 for the cyclone fan also includes a second wheel ring 4. The center of the second wheel ring 4 is at the same position as the center of the first wheel ring 3. The second wheel ring 4 and the first wheel ring 3 are located on the same plane. The second wheel ring 4 is located between the slider 2 and the first wheel ring 3. The radial rod 11 passes through the second wheel ring 4 and is fixed to the second wheel ring 4 by a pressure bearing 41. In addition to its fixing function, the second wheel ring 4, together with the pressure bearing 41, also shares part of the centrifugal force when the fan rotates, preventing the centrifugal force from concentrating on the first wheel ring 3 and the blades, reducing stress concentration, and extending service life.

[0022] The automatic blade angle adjustment device for cyclone fans provided by this utility model realizes automatic adjustment of blade angle, which is fast, efficient, accurate and effective.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" and their orientation or positional relationships are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A device for automatically adjusting the angle of a turbofan blade, characterized by, Comprising of: a first wheel, a plurality of blades are distributed on the outer periphery of the first wheel, the blades are fixed on the first wheel through rotating bearings, the bottom of the blades are connected with radial rods, the radial rods pass through the first wheel and lead to the center position of the first wheel; a slider, the slider is circular, the slider is located at the center position of the first wheel, a plurality of connecting rods are evenly arranged on the outer periphery of the slider, the connecting rods are connected with the slider and the ends of the radial rods; a hydraulic cylinder, the piston rod of the hydraulic cylinder is connected with the center position of the slider, the hydraulic cylinder is used to push or pull the slider in the axial direction; a hydraulic station, the hydraulic station controls the hydraulic cylinder.

2. The counter-rotating fan blade angle automatic adjustment device according to claim 1, characterized by, Further comprising a second wheel, the center position of the second wheel is the same as the center position of the first wheel, the second wheel is located in the same plane with the first wheel, and the second wheel is located between the slider and the first wheel, the radial rods pass through the second wheel and the radial rods are fixed with the second wheel through pressure bearings.

3. The counter-rotating fan blade angle automatic adjustment device according to claim 1, characterized by, The slider is a polytetrafluoroethylene slider.

4. The counter-rotating fan blade angle automatic adjustment device according to claim 1, characterized by, The connecting rods are hinged with the slider and the ends of the radial rods are hinged.

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