Propeller pitch adjusting device and using method

Abstract

The invention discloses a propeller pitch adjusting device and a using method. A propeller pitch adjusting device comprises a control device, a measuring device and an angle adjusting device. The measuring device is arranged in a blade of the propeller and is used for obtaining measurement data of the blade and feeding back the measurement data to the control device; the control device is used for analyzing and processing the measurement data so as to control the angle adjusting device; the angle adjusting device is connected with the roots of the blades, and the propeller moment of the propeller is adjusted by adjusting the angles of the blades. According to the technical scheme, the problems of poor precision, poor repeatability and the like in the manual adjustment process are solved; and meanwhile, the efficiency in the paddle adjusting process is greatly improved, and the ground test time is shortened.

Description

Technical Field

[0001] The invention belongs to an aircraft propeller blade torque changing mechanism, and in particular relates to a propeller pitch regulating device and a use method thereof. Background Art

[0002] Ground-mounted adjustable pitch propellers are widely used in drones, powered hang gliders, electric manned aircraft and other aircraft. Compared with fixed-pitch propellers, their blade angles can be adjusted on the ground to change the pitch. When the adjustable pitch propeller is connected to the power source, the matching working relationship between different power, torque and speed output conditions and different blade angles can be mastered through ground bench testing or aircraft taxiing testing, and the optimal blade angle of the ground-mounted adjustable pitch propeller can be obtained based on the flight conditions. Compared with real-time variable pitch propellers, it has the advantages of simple structure, easy maintenance and stable performance.

[0003] However, most ground-based adjustable pitch propellers use manual adjustment in the process of adjusting the blade angle, which has problems such as poor adjustment accuracy, long time and difficulty in adjustment. In addition, in the performance test of ground-based adjustable pitch propellers, multiple adjustments of different pitches are required. Manual adjustment of the blade angle will greatly affect the progress of the test work, with low efficiency and poor repeatability. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides the following technical solutions:

[0005] A propeller pitch adjustment device comprises a control device, a measuring device and an angle adjustment device; the measuring device is arranged in a propeller blade, and is used to obtain measurement data of the blade, and feed the measurement data back to the control device; the control device is used to analyze and process the measurement data to control the angle adjustment device; the angle adjustment device is connected to the root of the blade, and adjusts the propeller pitch by adjusting the angle of the blade.

[0006] Preferably, the measuring device is arranged at 75% of the blade radius position of the propeller blade; the control device comprises a signal processor and a drive module; the signal processor is used to analyze and process the measurement data; the drive module controls the angle adjustment device according to the result of the analysis and processing by the signal processor.

[0007] Preferably, the measuring device is provided with an angle sensor and a sensor fixture; the angle sensor is used to measure the real-time blade angle of the blade, and is arranged at a position of 75% of the blade radius; the sensor fixture is used to fix the angle sensor and the blade.

[0008] Preferably, the angle adjustment device includes a driving device, a driving shaft, a connecting member and a fastener; the driving device communicates with the driving module; the two ends of the driving shaft are respectively connected to the driving device and the connecting member; the two ends of the connecting member are respectively connected to the driving shaft and the fastener; the fastener is fixedly connected to the root of the blade.

[0009] Preferably, the control device further includes a power module and a human-computer interaction module; the power module is used to supply power to the control device, and the human-computer interaction module is used to input a set blade angle value.

[0010] Preferably, the control device also includes a control base, which is sleeved on the hub of the propeller, and a notch is provided on the lower surface of the control base, and an axial hole is provided above the notch; the signal processor, drive module, power module, human-computer interaction module and drive device are all arranged in the control base; the drive shaft passes through the axial hole and is connected to the connecting member.

[0011] Preferably, the measurement data includes a real-time blade angle value of the blade; and the analysis process includes calculating an angle difference between the set blade angle value and the real-time blade angle value.

[0012] Preferably, the driving module outputs a signal or does not output a signal according to the angle difference: when the angle difference is a positive number, the first enable signal and the first pulse width modulation signal are output to make the angle adjustment device rotate forward; when the angle difference is a negative number, the second enable signal and the second pulse width modulation signal are output to make the angle adjustment device reverse; when the angle difference is zero, the driving module does not output a signal, and the angle adjustment device stops rotating.

[0013] A method for using a propeller pitch regulating device, using the above-mentioned propeller pitch regulating device, comprises the following steps:

[0014] S1: first, the control device is fixedly mounted on the propeller hub, and then the measuring device is fixed on the blade; finally, the angle adjustment device is fixedly connected to the root of the propeller blade;

[0015] S2: Turn on the control device and input the set blade angle value;

[0016] S3: The angle sensor in the measuring device measures the real-time blade angle of the blade to obtain a real-time blade angle value, and outputs it to the signal processor;

[0017] S4: the signal processor analyzes and processes the real-time blade angle value, and outputs the result to the driving module;

[0018] S5: the driving module judges the output result of the signal processor and drives the angle adjustment device to work so that the real-time blade angle value is equal to the set blade angle value, thereby completing the pitch adjustment;

[0019] S6: Disassemble the pitch regulating device from the propeller.

[0020] Preferably, the analysis and processing refers to calculating the angle difference between the set blade angle value and the real-time blade angle value; and the drive module outputs a signal or does not output a signal according to the angle difference: when the angle difference is a positive number, a first enable signal and a first pulse width modulation signal are output to make the angle adjustment device rotate forward; when the angle difference is a negative number, a second enable signal and a second pulse width modulation signal are output to make the angle adjustment device reverse; when the angle difference is 0, no signal is output, and the angle adjustment device stops rotating. Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The present invention adjusts the propeller moment by adjusting the propeller blade angle.

[0022] 2) The present invention adopts a fully automatic propeller blade angle adjustment device, which can greatly improve the efficiency of blade angle adjustment and shorten the working time of the propeller in ground testing;

[0023] 3) The present invention can solve the problems of poor adjustment accuracy and poor repeatability when manually adjusting the propeller blade angle through an intelligent propeller blade angle adjustment device;

[0024] 4) The touch control device used in the present invention can abandon the upper computer software such as PLC and equipment such as industrial control computers, and has the advantages of simple structure, convenient operation, and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a propeller in the prior art;

[0026] Figure 2 This is a diagram showing the connection between the pitch regulating device of the present invention and the propeller;

[0027] Figure 3 This is a front view of the connection between the pitch regulating device of the present invention and the propeller;

[0028] Figure 4 This is a back view of the connection between the pitch regulating device of the present invention and the propeller;

[0029] Figure 5 This is a schematic diagram of the control base structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the control device in the pitch regulating device of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] like Figure 1 and Figure 2 As shown, a propeller pitch adjustment device includes a control device 1, a measuring device 2 and an angle adjustment device 3.

[0034] The measuring device 2 is arranged in the middle of the blade 41 of the propeller 4 and communicates with the control device 1. The measuring device 2 is arranged at 75% of the radius of the blade 41, and is used to measure the angle of the blade 41, and feed back the obtained measurement data such as the blade angle value to the control device 1; the control device 1 is used to receive the measurement data output by the measuring device 2, analyze the measurement data, and then control the angle adjustment device 3 according to the analysis and processing results; the adjustment device 3 communicates with the control device 1, and the adjustment device 3 is fixedly connected to the root of the blade 41 of the propeller 4, so that the adjustment device 3 can adjust the torque of the propeller.

[0035] Specifically, Figure 6 As shown, the control device 1 includes a signal processor 11 and a driving module 13 .

[0036] Furthermore, the signal processor 11 is used to analyze and process the received measurement data, especially to compare the real-time blade angle value detected by the measuring device with the set blade angle value of the blade 41, calculate the angle difference between the set blade angle value and the real-time blade angle value, and output the angle difference to the drive module 13.

[0037] The driving module 13 judges the angle difference and outputs an enable signal and a pulse width modulation signal (i.e., Pulse Width Modulation, referred to as PMW signal) according to the judgment result, so that the angle adjustment device 3 works. When the angle difference result is positive, the driving module 13 outputs a first enable signal, whose value is 1, which causes the driving device 31 to rotate, so that the blade 31 is driven to rotate forward under the action of the angle adjustment device 3; at the same time, the driving module 13 outputs a first PWM signal of a corresponding pulse width according to the size of the angle difference, so that the angle adjustment device 3 can accurately adjust the angle of the blade 41. When the angle difference result is negative, the driving module 13 outputs a second enable signal, whose value is 0, which causes the driving device 31 to rotate, so that the blade 31 is driven to reverse under the action of the angle adjustment device 3; at the same time, the driving module 13 outputs a second PWM signal of a corresponding pulse width according to the size of the angle difference, so that the angle adjustment device 3 can accurately adjust the angle of the blade 41.

[0038] The measuring device 2 includes an angle sensor 21 and a sensor holder (not shown in the figure). In order to make the blade angle value of the section at 75% of the propeller radius represent the blade angle value of the entire blade, the angle sensor 21 is installed at the 75% radius position of the blade 41 to measure the blade angle value of the propeller 4, and the angle value is fed back to the signal processor 11 in the control device 1; the sensor holder is used to connect the angle sensor 21 and the blade 41, so that the angle sensor 21 is firmly connected to the blade 41.

[0039] like Figure 2 and Figure 3 As shown, the number of the angle adjustment devices 3 corresponds to the propeller blades 41. The angle adjustment device 3 includes a driving device 31, a driving shaft 32, a connecting member 33 and a fastener 34. The driving device 31 is arranged in the control device 1, and is used to receive the driving signal output by the driving module 31, and work according to the received driving signal. One end of the driving shaft 32 is connected to the driving device 31, and the other end is connected to one end of the connecting member 33, and the other end of the connecting member 33 is connected to the fastener 34; the fastener 34 is fixedly connected to the blade root 42 of the blade 41.

[0040] Therefore, when the drive device 31 receives the first enable signal, the drive device 1 rotates forward, thereby driving the drive shaft 32 to rotate, and the rotation of the drive shaft 32 drives the connecting member 33 to rotate, and then drives the fastener 34 to rotate, and the rotation of the fastener 34 causes the blade root 42 to rotate, so that the blade 41 rotates forward; at the same time, the drive device 1 provides a corresponding driving force for the drive shaft 32 according to the received first pulse width modulation signal, and achieves the purpose of adjusting the blade torque by making the real-time blade angle value consistent with the set blade angle value; similarly, when the drive device 31 receives the second enable signal, the drive device 1 reverses and transmits the reverse driving force to the blade 41 through the drive shaft 2, the connecting member 33 and the fastener 34, so that the blade 41 reverses; at the same time, according to the received second PMW signal, the drive 32 is provided with a corresponding driving force, and the real-time blade angle value is made consistent with the set blade angle value, so as to achieve the purpose of adjusting the blade torque.

[0041] In this specific embodiment, in order to make the driving force control more precise, the driving device 31 is preferably a servo motor, and accordingly, the driving module 13 is a servo driving module; and in order to facilitate maintenance and disassembly, the fastener 33 is preferably a clamp.

[0042] Embodiment 2:

[0043] like Figure 5 and Figure 6 As shown, the difference between this embodiment and embodiment 1 is that the control device 1 further includes a power module 12, a human-machine interaction module 14 and a control base 15. The power module 12 is used to supply power to the signal processor 11, the drive module 13 and the human-machine interaction module 14; the human-machine interaction module 14 is used to input a set blade angle value to the control device 1; and the control base 15 is used to accommodate the signal processor 11, the power module 12 and the human-machine interaction module 14.

[0044] Meanwhile, the control base 15 is fixedly installed with the propeller 4; more specifically, the control base 15 is sleeved on the propeller hub 43 of the propeller, and the control base 15 is fixedly connected with the propeller 4 through the fastener 16. Further, the control base 15 is cylindrical, and the upper surface of the control base 15 is sleeved on the propeller hub 43; the lower surface of the control base 15 is provided with a plurality of notches, the shape of the notches is consistent with the outer shape of the blade root 42, so that the notches surround the blade root 42; the number of the notches is consistent with the number of the blades 41.

[0045] In order to save installation space and ensure stable communication, the driving device 31 in the angle adjustment device 3 is also arranged in the control base 15. Figure 3As shown, the control base 15 is provided with an axial hole 16, which is arranged just above the blade root 42, and the drive shaft 32 passes through the axial hole 16 and is fixedly connected to the connecting member 33. Further, the connecting member 33 is a connecting rod, and the connecting member 33 is vertically connected to the drive shaft 32 and the fastener 34.

[0046] In addition, a signal indicator light is also provided in the control device 1. When the enable signal output by the drive module 13 is 1 or 0, the signal indicator light is red; conversely, when the difference between the set blade angle value and the real-time blade angle value is 0, the signal indicator light is green.

[0047] Embodiment 3:

[0048] A method for using a propeller pitch regulating device, characterized in that the propeller pitch regulating device in the above embodiment is used, and comprises the following steps:

[0049] S1: Fix the pitch adjustment device to the propeller;

[0050] Further, the control device 1 is fixedly mounted on the propeller; specifically, the control base 16 in the control device 1 is fixedly mounted on the hub 43 of the propeller; in addition, the angle sensor 21 is fixed at the 75% radius position of the propeller blade 4 through the sensor fixing mechanism; finally, the angle adjustment device 3 is fixedly connected to the root 42 of the blade;

[0051] S2: Turn on the control device 1. Since the adjustment program has not yet been entered, the indicator light is green at this time. After all devices in the adjustment device are powered on and enter the standby state, the set blade angle value is input to the control device 1. Specifically, the set blade angle value can be input through the human-computer interaction module 14.

[0052] S3: The angle sensor 21 in the measuring device detects the real-time blade angle value and outputs it to the signal processor 11

[0053] S4: the signal processor 11 analyzes and processes the real-time blade angle value, and outputs the result to the drive module; in this embodiment, the analysis and processing refers to calculating the angle difference between the set blade angle value and the real-time blade angle value; and the drive module outputs an enable signal and a pulse width modulation signal or does not output a signal according to the angle difference; when the angle difference is a positive number, a first enable signal and a first pulse width modulation signal are output, and the indicator light is red; when the angle difference is a negative number, a second enable signal and a second pulse width modulation signal are output, and the indicator light is red;

[0054] S5: The driving module drives the angle adjustment device to work according to the result, so that the real-time blade angle value and the set blade angle value are equal, thereby completing the pitch adjustment. Specifically, when the angle difference is 0, the signal light is green, the driving module does not output a signal, and the driving device 31 in the angle adjustment device 3 stops rotating, thereby completing the propeller pitch adjustment.

[0055] In summary, the technical solution of the present invention is adopted to automatically adjust the blade angle value using an intelligent integrated device, which, on the one hand, solves the problems of poor accuracy and poor repeatability in the manual adjustment process; on the other hand, it greatly improves the efficiency of the blade adjustment process and shortens the time of ground testing.

[0056] It should be noted that the technical features in the above-mentioned embodiments 1 to 3 can be combined arbitrarily, and the combined technical solutions all belong to the protection scope of the present application. And in this article, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A propeller pitch adjustment device, characterized in that: It comprises a control device, a measuring device and an angle adjustment device; the measuring device is arranged in the propeller blade, and is used to obtain the measurement data of the propeller blade, and feed the measurement data back to the control device; the control device is used to analyze and process the measurement data to control the angle adjustment device; the angle adjustment device is connected to the root of the propeller blade, and adjusts the propeller torque by adjusting the angle of the propeller blade.

2. The adjusting device according to claim 1, characterized in that The measuring device is arranged at a blade radius position of 75% of the propeller blade; the control device comprises a signal processor and a drive module; the signal processor is used to analyze and process the measurement data; The driving module controls the angle adjustment device according to the result of analysis and processing by the signal processor.

3. The adjusting device according to claim 2, characterized in that: The measuring device is provided with an angle sensor and a sensor fixture; the angle sensor is used to measure the real-time blade angle of the blade, and is arranged at a blade radius position of 75% of the blade; the sensor fixture is used to fix the angle sensor and the blade.

4. The adjusting device according to claim 3, characterized in that The angle adjustment device includes a driving device, a driving shaft, a connecting piece and a fastener; the driving device communicates with the driving module; the two ends of the driving shaft are respectively connected to the driving device and the connecting piece; the two ends of the connecting piece are respectively connected to the driving shaft and the fastener; the fastener is fixedly connected to the blade root of the blade.

5. The adjusting device according to claim 4, characterized in that The control device also includes a power module and a human-computer interaction module; the power module is used to supply power to the control device, and the human-computer interaction module is used to input a set blade angle value.

6. The adjusting device according to claim 5, characterized in that The control device also includes a control base, which is sleeved on the hub of the propeller. A notch is provided on the lower surface of the control base, and an axial hole is provided above the notch; the signal processor, drive module, power module, human-computer interaction module and drive device are all arranged in the control base; the drive shaft passes through the axial hole and is connected to the connecting piece.

7. The adjusting device according to claim 6, characterized in that The measurement data includes a real-time blade angle value of the blade; and the analysis process includes calculating an angle difference between the set blade angle value and the real-time blade angle value.

8. The adjusting device according to claim 7, characterized in that The driving module outputs a signal or does not output a signal according to the angle difference: when the angle difference is a positive number, the first enable signal and the first pulse width modulation signal are output to make the angle adjustment device rotate forward; when the angle difference is a negative number, the second enable signal and the second pulse width modulation signal are output to make the angle adjustment device reverse; when the angle difference is zero, the driving module does not output a signal, and the angle adjustment device stops rotating.

9. A method for using a propeller pitch adjustment device, characterized in that: A propeller pitch regulating device according to any one of claims 2 to 6 is adopted, comprising the following steps: S1: first, the control device is fixedly mounted on the propeller hub, and then the measuring device is fixed on the blade; finally, the angle adjustment device is fixedly connected to the root of the propeller blade; S2: Turn on the control device and input the set blade angle value; S3: The angle sensor in the measuring device measures the real-time blade angle of the blade to obtain a real-time blade angle value, and outputs it to the signal processor; S4: the signal processor analyzes and processes the real-time blade angle value, and outputs the result to the driving module; S5: the driving module judges the output result of the signal processor and drives the angle adjustment device to work so that the real-time blade angle value is equal to the set blade angle value, thereby completing the pitch adjustment; S6: Disassemble the pitch regulating device from the propeller.

10. The method of use according to claim 9, characterized in that: The analysis and processing refers to calculating the angle difference between the set blade angle value and the real-time blade angle value; and the driving module outputs a signal or does not output a signal according to the angle difference: when the angle difference is a positive number, a first enable signal and a first pulse width modulation signal are output to make the angle adjustment device rotate forward; when the angle difference is a negative number, a second enable signal and a second pulse width modulation signal are output to make the angle adjustment device reverse; when the angle difference is 0, no signal is output, and the angle adjustment device stops rotating.

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