Propeller trim balance detection device and method of use

Abstract

A propeller random balance detection device, the propeller random balance detection device includes a support, a drag roller, a support shaft, a hub assembly, a propeller, two support shafts; the top left end of the support is connected with the bottom of a drag roller, the top right end of the support is connected with the bottom of two drag rollers, the top of a drag roller is connected with the side of a support shaft, the right end of a support shaft is connected with the left side of a hub assembly, the propeller is sleeved on the side of the hub assembly, the right side of the hub assembly is connected with the left end of two support shafts, and the side of the two support shafts is connected with the top of two drag rollers; the structure of the drag roller and the two drag rollers is same; the side of the propeller is uniformly provided with at least two hub blades which are same in structure. The design is same with the normal working state of the propeller, the propeller axis is in a horizontal state, the static friction between the propeller and the test device is reduced, and the test data is more accurate.

Description

Technical Field

[0001] The present invention relates to an improvement of propeller technology, belongs to the field of ships, and in particular to a propeller random balance detection device and a use method thereof. Background Art

[0002] To improve the comfort of modern ships, the requirements for noise control on naval equipment are becoming increasingly stringent. However, most modern ships still use traditional propellers for propulsion. As a traditional propulsion device, propeller vibration noise is a major source of ship noise. Therefore, to minimize propeller vibration noise, propellers must undergo static balancing during the manufacturing process to minimize the impact of vibration noise caused by unbalanced torque during the manufacturing process. According to the requirements for propeller static balancing, propellers should undergo a static balancing test before static balancing.

[0003] Definition of random equilibrium: If the equilibrium state of an object does not change with time and position under the influence of external factors, this state is called "random equilibrium". For example, when a sphere stops on a horizontal plane, or when a cone is in contact with the plane with its generatrix, a random equilibrium state will appear. When these objects are moved to a new position, although they cannot automatically return to their original position, they can still stay still in the new position, and the height of their center of gravity remains unchanged. Generally speaking, an object that cannot raise or lower its center of gravity by any slight movement must be in a random equilibrium state. The conventional random equilibrium operation method of a fixed-pitch propeller is mainly to place it vertically, place the entire propeller blade horizontally, adjust the propeller axis to a vertical state, and then measure the bending moment generated by the propeller in the vertical direction to determine the unbalanced torque of the entire propeller. This method is inconsistent with the actual use of the propeller, so the measured value is not accurate.

[0004] A Chinese patent application with application number CN201710395367.1 and application date May 26, 2017 discloses a method for measuring the static balance of an adjustable pitch propeller, including: instrument adjustment preparation; blade placement and adjustment; data recording; instrument arrangement and return. In addition, a static balance measuring device for an adjustable pitch propeller is also disclosed. The comparative document patent still adopts a vertical placement, so that the entire propeller blade surface is placed horizontally for testing, which is inconsistent with the actual use state of the propeller, and the measured value is inaccurate.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problem of inaccurate measured values ​​in the prior art and to provide a propeller random balance detection device with accurate measured values ​​and a method for using the device.

[0007] To achieve the above objectives, the technical solution of the present invention is: a propeller random balance detection device, the propeller random balance detection device includes a bracket, a drag roller, a support shaft, a hub assembly, a propeller, and two support shafts;

[0008] The left end of the top of the bracket is connected to the bottom of a drag roller, the right end of the top of the bracket is connected to the bottom of the second drag roller, the top of the first drag roller is connected to the side of a support shaft, the right end of the first support shaft is connected to the left side of the hub assembly, the side of the hub assembly is provided with a propeller, the right side of the hub assembly is connected to the left end of the two support shafts, and the side of the two support shafts is connected to the top of the two drag rollers;

[0009] The first drag roller and the second drag roller have the same structure;

[0010] At least two blades with the same structure are evenly arranged on the side of the propeller.

[0011] The drag roller comprises a base, a support arm, and a roller. The top of the base is connected to the bottom of the support arm, the back of the support arm is slidably connected to the roller, and the roller is slidably matched with the hub assembly.

[0012] A slide groove is provided on the top of the base, and there are two support arms. The two support arms are respectively arranged on both sides of the inner wall of the slide groove, and the side circumferences of the two rollers are slidably matched with the circular axis of the hub assembly.

[0013] The number of the blades is five, namely one blade, two blades, three blades, four blades and five blades, and the one blade, two blades, three blades, four blades and five blades are uniformly inserted in sequence around the side of the hub assembly.

[0014] The length of the first support shaft is smaller than the length of the second support shaft, and the diameter of the first support shaft is the same as the diameter of the second support shaft.

[0015] A method for using a propeller random balance detection device, the method comprising the following steps:

[0016] Step 1: First, place the propeller on the side of the hub assembly, connect the left end of the hub assembly to the right end of a support shaft, and connect the right end of the hub assembly to the left ends of the two support shafts. Then, place the left end of the one support shaft on a roller and the right end of the two support shafts on the two rollers. At this time, the propeller axis is in a horizontal state; the blades include blade one and blade two;

[0017] Step 2: First, rotate one blade to a vertical upward position, then rotate the other blade to the right. At this point, the centerline of the blade flange is horizontal. Then, keep the blade stationary for a preset time, then remove the holding force to restore the blade to a free state. When the blade is in a static equilibrium state again, record the angle between the centerline of the blade flange and the horizontal line to obtain angle data No. 1.

[0018] Step 3: First, rotate one blade to a vertical downward position, then rotate the other blade to the right. At this point, the centerline of the blade flange is horizontal. Then, keep the blade stationary for a preset time, then remove the holding force to restore the blade to a free state. When the blade is in static equilibrium again, record the angle between the centerline of the blade flange and the horizontal line to obtain the second angle data.

[0019] Step 4: First rotate one blade to a vertical upward position, then rotate the other blade to the left. At this point, the centerline of the blade flange is horizontal. Then keep the blade stationary for a preset time, then remove the holding force to restore the blade to a free state. When the blade is in static equilibrium again, record the angle between the centerline of the blade flange and the horizontal line to obtain the No. 3 angle data.

[0020] Step 5: First, rotate one blade to a vertical downward position, then rotate the other blade to the left. At this point, the centerline of the blade flange is horizontal. Then, keep the blade stationary for a preset time, then remove the holding force to restore the blade to a free state. When the blade is in static equilibrium again, record the angle between the centerline of the blade flange and the horizontal line to obtain the fourth angle data.

[0021] Step 6: Perform the same test on the two blades according to the above random balancing operation method, and obtain the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the two blades;

[0022] Step 7: Analyze all the No. 1 angle data, No. 2 angle data, No. 3 angle data, and No. 4 angle data obtained above. When all the angle data are not greater than °, it is determined that the propeller balance test is qualified.

[0023] In the step 1, the blades include one blade, two blades, three blades, four blades, and five blades;

[0024] The step six also includes performing the same random balance test on the three-blade, four-blade, and five-blade propellers according to the above-mentioned random balance operation method, and obtaining the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the three-blade, four-blade, and five-blade propellers.

[0025] In step seven, when the angle data is greater than °, it is determined that the propeller's random balancing test is unqualified, and the unqualified propeller blades are ground. After the grinding is completed, each blade is re-balanced according to the above steps to obtain the final data that meets the index requirements.

[0026] The grinding method is specifically as follows: grinding away some metal on the suction surface of each blade to maintain the smoothness of the blade surface within a thickness deviation range.

[0027] After grinding away some metal, the width and thickness of each blade and the surface smoothness are checked again.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In a propeller balance detection device and its use method of the present invention, the top left end of the bracket is connected to the bottom of a drag roller, the top right end of the bracket is connected to the bottom of two drag rollers, the top of one drag roller is connected to the side of a support shaft, the right end of one support shaft is connected to the left side of a hub assembly, a propeller is provided on the side of the hub assembly, the right side of the hub assembly is connected to the left end of two support shafts, the side of the two support shafts is connected to the top of the two drag rollers, the propeller is placed in a horizontal state according to its actual working state, which is the same as the normal working state of the propeller, and the two ends of the propeller are provided with support shafts, which support the propeller so that the propeller axis is in a horizontal state and is placed on the drag roller, thereby reducing the static friction between the propeller and the test device and making the test data more accurate. Therefore, the measurement results of this design are more accurate and the error is smaller.

[0030] 2. The present invention provides a propeller random balancing detection device and its use method. By performing random balancing on the propeller, the influence of each blade on the unbalanced torque of the entire propeller can be detected. During the random balancing process, each blade is trimmed to achieve a balanced state with respect to the eccentric torque of the entire propeller due to its mass and center of gravity. Thus, during use, the entire propeller is kept in a balanced state relative to its center, preventing eccentric torque from being generated. This results in a more accurate propeller, effectively reducing propeller vibration and noise. Therefore, this design reduces propeller vibration and noise and is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a side view of the present invention.

[0033] Figure 3 It is a structural diagram of a drag roller in the present invention.

[0034] Figure 4 It is a schematic diagram of the state of the propeller rotating right in the present invention.

[0035] Figure 5 It is a schematic diagram of the state of the propeller rotating left in the present invention.

[0036] In the figure: a bracket 1, a drag roller 2, a base 21, a slide 22, a support arm 23, a roller 24, a support shaft 3, a hub assembly 4, a propeller 5, one blade 51, two blades 52, three blades 53, four blades 54, five blades 55, two support shafts 6, and two drag rollers 7. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] See also Figures 1 to 5 A propeller random balance detection device, the propeller random balance detection device includes a bracket 1, a drag roller 2, a support shaft 3, a hub assembly 4, a propeller 5, and two support shafts 6;

[0039] The top left end of the bracket 1 is connected to the bottom of a drag roller 2, the top right end of the bracket 1 is connected to the bottom of the second drag roller 7, the top of the first drag roller 2 is connected to the side of a support shaft 3, the right end of the first support shaft 3 is connected to the left side of the hub assembly 4, the side of the hub assembly 4 is provided with a propeller 5, the right side of the hub assembly 4 is connected to the left end of the second support shaft 6, and the side of the second support shaft 6 is connected to the top of the second drag roller 7;

[0040] The first drag roller 2 and the second drag roller 7 have the same structure;

[0041] At least two blades with the same structure are evenly arranged on the side of the propeller 5.

[0042] The drag roller 2 includes a base 21, a support arm 23, and a roller 24. The top of the base 21 is connected to the bottom of the support arm 23, the back of the support arm 23 is slidably connected to the roller 24, and the roller 24 is slidably matched with the hub assembly 4.

[0043] A slide groove 22 is provided on the top of the base 21 , and there are two support arms 23 . The two support arms 23 are respectively arranged on both sides of the inner wall of the slide groove 22 , and the side surfaces of the two rollers 24 are slidably matched with the circular axis of the hub assembly 4 .

[0044] There are five blades, namely one blade 51, two blades 52, three blades 53, four blades 54, and five blades 55, and one blade 51, two blades 52, three blades 53, four blades 54, and five blades 55 are uniformly inserted in sequence around the side of the hub assembly 4.

[0045] The length of the first support shaft 3 is smaller than the length of the second support shaft 6, and the diameter of the first support shaft 3 and the diameter of the second support shaft 6 are the same.

[0046] A method for using a propeller random balance detection device, the method comprising the following steps:

[0047] Step 1: First, the propeller 5 is sleeved on the side of the hub assembly 4. The left end of the hub assembly 4 is connected to the right end of the first support shaft 3, and the right end of the hub assembly 4 is connected to the left end of the second support shaft 6. Then, the left end of the first support shaft 3 is placed on the first drag roller 2, and the right end of the second support shaft 6 is placed on the second drag roller 7. At this time, the axis of the propeller 5 is in a horizontal state; the blades include a first blade 51 and a second blade 52;

[0048] Step 2: First, rotate the blade 51 to a vertically upward position, and then rotate the blade 51 to the right. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, and then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain angle data No. 1.

[0049] Step 3: First, rotate the blade 51 to a vertical downward position, then rotate the blade 51 to the right. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain the second angle data.

[0050] Step 4: First, rotate the blade 51 to a vertically upward position, and then rotate the blade 51 to the left. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, and then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain the third angle data;

[0051] Step 5: First, rotate the blade 51 to a vertical downward position, then rotate the blade 51 to the left. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain the fourth angle data.

[0052] Step 6: Perform the same test on the two blades 52 according to the above random balancing operation method, and obtain the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the two blades 52;

[0053] Step 7: Analyze all the No. 1 angle data, No. 2 angle data, No. 3 angle data, and No. 4 angle data obtained above. When all the angle data are not greater than 5°, it is determined that the propeller 5 has passed the random balance test.

[0054] In step 1, the blades include one blade 51, two blades 52, three blades 53, four blades 54, and five blades 55;

[0055] The step six also includes performing the same random balance test on the three blades 53, the four blades 54, and the five blades 55 according to the above-mentioned random balance operation method, and obtaining the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the three blades 53, the four blades 54, and the five blades 55.

[0056] In step seven, when the angle data is greater than 5°, it is determined that the propeller 5 has failed the random balancing test, and the unqualified propeller 5 blades are ground. After the grinding is completed, each blade is re-balanced according to the above steps to obtain the final data that meets the index requirements.

[0057] The grinding method is specifically as follows: grinding away some metal on the suction surface of each blade to maintain the smoothness of the blade surface within a thickness deviation range.

[0058] After grinding away some metal, the width and thickness of each blade and the surface smoothness are checked again.

[0059] Example 1:

[0060] A propeller random balance detection device, comprising a bracket 1, a drag roller 2, a support shaft 3, a hub assembly 4, a propeller 5, and two support shafts 6;

[0061] The top left end of the bracket 1 is connected to the bottom of a drag roller 2, the top right end of the bracket 1 is connected to the bottom of the second drag roller 7, the top of the first drag roller 2 is connected to the side of a support shaft 3, the right end of the first support shaft 3 is connected to the left side of the hub assembly 4, the side of the hub assembly 4 is provided with a propeller 5, the right side of the hub assembly 4 is connected to the left end of the second support shaft 6, and the side of the second support shaft 6 is connected to the top of the second drag roller 7;

[0062] The structure of the first drag roller 2 and the second drag roller 7 is the same;

[0063] At least two blades with the same structure are evenly arranged on the side of the propeller 5.

[0064] A method for using a propeller random balance detection device, the method comprising the following steps:

[0065] Step 1: First, the propeller 5 is sleeved on the side of the hub assembly 4. The left end of the hub assembly 4 is connected to the right end of the first support shaft 3, and the right end of the hub assembly 4 is connected to the left end of the second support shaft 6. Then, the left end of the first support shaft 3 is placed on the first drag roller 2, and the right end of the second support shaft 6 is placed on the second drag roller 7. At this time, the axis of the propeller 5 is in a horizontal state; the blades include a first blade 51 and a second blade 52;

[0066] Step 2: First, rotate the blade 51 to a vertically upward position, and then rotate the blade 51 to the right. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, and then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain angle data No. 1.

[0067] Step 3: First, rotate the blade 51 to a vertical downward position, then rotate the blade 51 to the right. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain the second angle data.

[0068] Step 4: First, rotate the blade 51 to a vertically upward position, and then rotate the blade 51 to the left. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, and then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain the third angle data;

[0069] Step 5: First, rotate the blade 51 to a vertical downward position, then rotate the blade 51 to the left. At this time, the flange centerline of the blade 51 is horizontal. Then, keep the blade 51 in a static state for a preset time, then remove the holding force to restore the blade 51 to a free state. When the blade 51 is in a static equilibrium state again, record the angle between the flange centerline of the blade 51 and the horizontal line to obtain the fourth angle data.

[0070] Step 6: Perform the same test on the two blades 52 according to the above random balancing operation method, and obtain the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the two blades 52;

[0071] Step 7: Analyze all the No. 1 angle data, No. 2 angle data, No. 3 angle data, and No. 4 angle data obtained above. When all the angle data are not greater than 5°, it is determined that the propeller 5 has passed the random balance test.

[0072] Example 2:

[0073] Example 2 is basically the same as Example 1, except that:

[0074] A propeller balance detection device, the one drag roller 2 includes a base 21, a support arm 23, and a roller 24. The top of the base 21 is connected to the bottom of the support arm 23, the back of the support arm 23 is slidably connected to the roller 24, and the roller 24 is slidably matched with the hub assembly 4. The use of one drag roller 2 and two drag rollers 7 is to reduce the static friction between the propeller 5 and the test device, so that the test data is more accurate; a slide groove 22 is opened on the top of the base 21, and the number of the support arms 23 is two, and the two support arms 23 are respectively set Arranged on both sides of the inner wall of the slide groove 22, the side circumferences of the two rollers 24 are slidably matched with the circular axis of the hub assembly 4; the number of the blades is five, namely one blade 51, two blades 52, three blades 53, four blades 54, and five blades 55, and one blade 51, two blades 52, three blades 53, four blades 54, and five blades 55 are uniformly inserted in sequence around the side circumference of the hub assembly 4; the length of the one support shaft 3 is less than the length of the two support shafts 6, and the diameter of the one support shaft 3 and the diameter of the two support shafts 6 are the same.

[0075] Example 3:

[0076] Example 3 is basically the same as Example 2, except that:

[0077] A method for using a propeller random balance detection device, wherein in step one, the blades include one blade 51, two blades 52, three blades 53, four blades 54, and five blades 55; in step six, the same random balance detection is performed on the three blades 53, four blades 54, and five blades 55 according to the random balance operation method, and the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the three blades 53, four blades 54, and five blades 55 are obtained; in step seven, When the angle data is greater than 5°, it is determined that the propeller 5 has failed the random balance test, and the unqualified propeller 5 blades are ground. After the grinding is completed, each blade is re-balanced according to the above steps to obtain the final data that meets the index requirements; the grinding method is specifically: some metal is ground off the suction surface of each blade to maintain the smoothness of the blade surface within the thickness deviation range; after the metal is ground off, the width and thickness of each blade and the surface smoothness are re-checked.

[0078] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A method for using a propeller random balance detection device, characterized by: The propeller random balance detection device comprises a bracket (1), a drag roller (2), a support shaft (3), a hub assembly (4), a propeller (5), and two support shafts (6); The left end of the top of the bracket (1) is connected to the bottom of a drag roller (2), the right end of the top of the bracket (1) is connected to the bottom of the second drag roller (7), the top of the first drag roller (2) is connected to the side of a support shaft (3), the right end of the support shaft (3) is connected to the left side of the hub assembly (4), the side of the hub assembly (4) is provided with a propeller (5), the right side of the hub assembly (4) is connected to the left end of the second support shaft (6), and the side of the second support shaft (6) is connected to the top of the second drag roller (7); The first drag roller (2) and the second drag roller (7) have the same structure; At least two blades of the same structure are evenly arranged on the side of the propeller (5); The number of the blades is five, namely one blade (51), two blades (52), three blades (53), four blades (54), and five blades (55), and the one blade (51), two blades (52), three blades (53), four blades (54), and five blades (55) are uniformly connected to the side of the hub assembly (4) in sequence; The method for using the propeller random balance detection device comprises the following steps: Step 1: first, the propeller (5) is sleeved on the side of the hub assembly (4), the left end of the hub assembly (4) is connected to the right end of a support shaft (3), the right end of the hub assembly (4) is connected to the left end of the second support shaft (6), and then the left end of the first support shaft (3) is placed on a drag roller (2), and the right end of the second support shaft (6) is placed on the second drag roller (7). At this time, the axis of the propeller (5) is in a horizontal state; the blades include a blade (51) and a blade (52); Step 2: First, rotate the blade (51) to a vertically upward position, and then rotate the blade (51) to the right. At this time, the flange center line of the blade (51) is horizontal. Then, keep the blade (51) in a static state. After maintaining it for a preset time, remove the holding force to restore the blade (51) to a free state. When the blade (51) is in a static equilibrium state again, record the angle between the flange center line of the blade (51) and the horizontal line to obtain angle data No.

1. Step 3: First, rotate the blade (51) to a vertical downward position, and then rotate the blade (51) to the right. At this time, the flange center line of the blade (51) is horizontal. Then, keep the blade (51) in a static state. After the blade (51) is kept in a preset time, remove the holding force to restore the blade (51) to a free state. When the blade (51) is in a static equilibrium state again, record the angle between the flange center line of the blade (51) and the horizontal line to obtain the second angle data. Step 4: First, rotate the blade (51) to a vertically upward position, and then rotate the blade (51) to the left. At this time, the flange center line of the blade (51) is horizontal. Then, keep the blade (51) in a static state. After the blade (51) is kept in a preset time, remove the holding force to restore the blade (51) to a free state. When the blade (51) is in a static equilibrium state again, record the angle between the flange center line of the blade (51) and the horizontal line to obtain the third angle data. Step 5: First, rotate the blade (51) to a vertical downward position, and then rotate the blade (51) to the left. At this time, the flange center line of the blade (51) is horizontal. Then, keep the blade (51) in a static state. After the blade (51) is kept in a preset time, remove the holding force to restore the blade (51) to a free state. When the blade (51) is in a static equilibrium state again, record the angle between the flange center line of the blade (51) and the horizontal line to obtain the fourth angle data. Step 6: Perform the same test on the two blades (52) according to the above steps 1 to 5, and obtain the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the two blades (52); Step 7: Analyze all the No. 1 angle data, No. 2 angle data, No. 3 angle data, and No. 4 angle data obtained above. When all the angle data are not greater than 5°, it is determined that the propeller (5) has passed the random balance test.

2. The method for using the propeller random balance detection device according to claim 1, characterized in that: The drag roller (2) comprises a base (21), a support arm (23), and a roller (24); the top of the base (21) is connected to the bottom of the support arm (23); the back of the support arm (23) is slidably connected to the roller (24); and the roller (24) is slidably matched with the hub assembly (4).

3. The method for using the propeller random balance detection device according to claim 2, characterized in that: A chute (22) is provided on the top of the base (21), and there are two support arms (23). The two support arms (23) are respectively arranged on both sides of the inner wall of the chute (22), and the side circumferences of the two rollers (24) are slidably matched with the circular axis of the hub assembly (4).

4. The method for using the propeller random balance detection device according to any one of claims 1 to 3, characterized in that: The length of the one support shaft (3) is smaller than the length of the two support shafts (6), and the diameter of the one support shaft (3) and the diameter of the two support shafts (6) are the same.

5. The method for using the propeller random balance detection device according to claim 1, characterized in that: In step 1, the blades include one blade (51), two blades (52), three blades (53), four blades (54), and five blades (55); The step six also includes performing the same random balance test on the three-blade (53), four-blade (54), and five-blade (55) according to the above steps one to five, and obtaining the first angle data, the second angle data, the third angle data, and the fourth angle data corresponding to the three-blade (53), the four-blade (54), and the five-blade (55).

6. The method for using the propeller random balance detection device according to claim 5, characterized in that: In the step seven, when the angle data is greater than 5°, it is determined that the propeller (5) has failed the random balancing test, and the unqualified propeller (5) blades are ground. After the grinding is completed, each blade is re-balanced according to the above steps to obtain the final data that meets the index requirements.

7. The method for using the propeller random balance detection device according to claim 6, characterized in that: The grinding method is specifically as follows: grinding away some metal on the suction surface of each blade to maintain the smoothness of the blade surface within a thickness deviation range.

8. The method for using the propeller random balance detection device according to claim 7, characterized in that: After grinding away some metal, the width and thickness of each blade and the surface smoothness are checked again.

Images