Vector triangle-based dynamic balance adjustment method and device for model rotor test bed

Abstract

The invention provides a dynamic balance adjustment method and device for a model rotor test bed based on a vector triangle. The method comprises the following steps: acquiring an initial vibration vector A of the model rotor test bed provided with blades; obtaining the vibration amplitude and phase influence coefficient of the balancing weight on the vibration of the model rotor test bed; according to the initial vibration vector A, the amplitude and the phase influence coefficient, the installation positions and masses of the two balancing weights to be loaded are obtained; and the two balancing weights are installed on the two corresponding paddle supporting arms according to the installation positions and the mass of the balancing weights to be loaded. Dynamic balance adjustment can be simultaneously carried out in the X direction and the Y direction of the plane of the model rotor test bed.

Description

Technical Field

[0001] The present application belongs to the technical field of rotor dynamic balance test, and in particular to a method and device for dynamic balance adjustment of a model rotor test bench based on vector triangles. Background Art

[0002] The test piece has uneven mass distribution due to shape errors or uneven internal structure. When the test bench rotates, its center of mass is not aligned with the center of rotation, which generates unnecessary vibration and noise, affecting the service life of the test piece and the normal conduct of the test. In serious cases, it may even endanger the safety of the test bench and cause damage to the test piece or even the test bench. Therefore, dynamic balance adjustment is a must before the rotor test bench officially starts the test. The quality of the test bench dynamic balance directly affects the test status and progress, and even affects the safe operation of the test bench.

[0003] The dynamic balance adjustment of the model rotor test bench is usually carried out by the test weight method. By collecting the vibration data of the test bench under the rotation of the rotor and performing data analysis, the vibration magnitude and phase of the plane X and Y directions of the test bench are obtained. Then, by adding counterweights to the rotor arm, the dynamic balance adjustment of the vibration of the plane X and Y directions of the test bench is carried out respectively until the plane vibration of the test bench is adjusted to meet the test requirements. Since the vibration of the test bench in the X and Y directions is coupled, the dynamic balance of the Y direction is easily affected when the dynamic balance adjustment in the X direction is performed. Sometimes, it is necessary to continuously adjust the size of the mass block loaded on the rotor arm to adjust the dynamic balance of the model rotor test bench to meet the test requirements. Summary of the invention

[0004] The invention provides a method and device for dynamic balance adjustment of a model rotor test bench based on vector triangles, which can realize dynamic balance adjustment in two directions of X and Y of the plane of the model rotor test bench at the same time.

[0005] A first aspect of the present invention provides a method for dynamic balancing a model rotor test bench based on a vector triangle, comprising:

[0006] Obtaining an initial vibration vector A of a model rotor test bench with blades installed;

[0007] Obtain the amplitude and phase influence coefficients of the counterweight on the vibration of the model rotor test bench;

[0008] According to the initial vibration vector A, amplitude and phase influence coefficient, the installation position and mass of two counterweights to be loaded are obtained;

[0009] According to the installation position and mass of the counterweight to be loaded, two counterweights are installed on the corresponding two blade arms.

[0010] Optionally, obtaining an initial vibration vector A of the model rotor test bench includes:

[0011] Step 1: Paste a three-axis vibration sensor on the model rotor test bench to test the vibration of the test bench;

[0012] Step 2: Adjust the test bench speed to the test state;

[0013] Step 3: Collect the vibration of the test bench at this speed through the data acquisition system;

[0014] Step 4: Use data analysis software to obtain the vibrations in the X and Y directions of the test bench plane at the rotor speed. Based on the vector triangle rule, vector addition is performed on the vibrations in the X and Y directions of the test bench plane to obtain the magnitude and phase of the total vibration A of the test bench plane.

[0015] Optionally, the amplitude and phase influence coefficients of the counterweight on the vibration of the model rotor test bench are obtained, including:

[0016] Step 1: Add a known weight to one of the rotor arms.

[0017] Step 2: Collect the vibration data of the model rotor test bench in this state, and obtain the vibration B of the test bench in this state through data analysis software;

[0018] Step 3: Based on the vector triangle rule, perform vector subtraction between vibration B and vibration A to obtain vibration C;

[0019] Step 4: By measuring the angle between vibration A and vibration C, the phase influence coefficient of the counterweight on the vibration phase of the test bench can be obtained. By calculating the ratio of the size of vibration C to the mass of the counterweight, the amplitude influence coefficient of the mass per gram of the counterweight on the vibration size of the test bench can be obtained.

[0020] Optionally, obtaining the installation positions and masses of two counterweights to be loaded according to the initial vibration vector A, the amplitude, and the phase influence coefficient includes:

[0021] Step 1: According to the vibration magnitude of vibration A and the influence of the mass of the counterweight on the vibration of the model rotor test bench, the weight of the counterweight that needs to be added is obtained;

[0022] Step 2: Based on the vector triangle rule, decompose the weight of the counterweight that needs to be added to the two nearest rotor arms to obtain the mass of the counterweight that needs to be loaded on each rotor arm.

[0023] Optionally, two counterweights are installed on two corresponding blade arms according to the installation position and mass of the counterweight to be loaded, including:

[0024] Step 1: According to the loading mass and phase calculation of the counterweight block, install the counterweight block on the rotor arm of the model rotor test bench as required;

[0025] Step 2: Adjust the test bench speed to the test state;

[0026] Step 3: Collect the vibration of the test bench at this speed through the data acquisition system;

[0027] Step 4: Use data analysis software to process the vibration data of the test bench to obtain the vibration of the test bench plane X and Y. Based on the vector triangle rule, vector addition is performed on the vibration of the test bench plane in the X and Y directions to obtain the magnitude and phase of the total vibration D of the test bench plane.

[0028] Step 5: Determine whether the vibration of the test bench meets the test requirements. If not, it is necessary to continue calculating, installing and testing the mass and phase of the counterweight block for the current test bench vibration D until the final vibration of the test bench meets the test requirements.

[0029] A second aspect of the present invention provides a model rotor test bench dynamic balance adjustment device based on a vector triangle, comprising:

[0030] An initial vibration vector acquisition module, used to acquire an initial vibration vector A of a model rotor test bench equipped with blades;

[0031] An influence coefficient acquisition module is used to obtain the amplitude and phase influence coefficients of the counterweight block on the vibration of the model rotor test bench;

[0032] The counterweight block parameter acquisition module is used to obtain the installation position and mass of two counterweight blocks to be loaded according to the initial vibration vector A, amplitude and phase influence coefficient;

[0033] The adjustment module is used to install the two counterweights on the corresponding two blade support arms according to the installation position and mass of the counterweights to be loaded.

[0034] Optionally, the initial vibration vector acquisition module is used to attach a three-axis vibration sensor to the model rotor test bench frame to test the vibration of the test bench; adjust the test bench speed to a test state; collect the vibration of the test bench at the speed through a data acquisition system; obtain the vibration of the test bench plane in the X and Y directions at the rotor speed through data analysis software, and perform vector addition of the vibration of the test bench plane in the X and Y directions based on the vector triangle law to obtain the magnitude and phase of the total vibration A of the test bench plane.

[0035] Optionally, the influence coefficient acquisition module is used to add a counterweight of known weight to one of the arms of the rotor; collect vibration data of the model rotor test bench in this state, and obtain the vibration B of the test bench in this state through data analysis software; based on the vector triangle law, vector subtraction is performed on vibration B and vibration A to obtain vibration C; by measuring the angle between vibration A and vibration C, the phase influence coefficient of the counterweight on the vibration phase of the test bench can be obtained, and by calculating the ratio of the size of vibration C to the mass of the counterweight, the amplitude influence coefficient of the counterweight per gram of mass on the vibration size of the test bench can be obtained.

[0036] Optionally, the counterweight parameter acquisition module is used to obtain the weight of the counterweight that needs to be added based on the vibration magnitude of vibration A and the influence of the counterweight mass on the vibration of the model rotor test bench; based on the vector triangle rule, the weight of the counterweight that needs to be added is decomposed to the two nearest rotor arms to obtain the mass of the counterweight that needs to be loaded on each rotor arm.

[0037] Optionally, an adjustment module is used to install the counterweight on the rotor arm of the model rotor test bench as required based on the counterweight loading mass and phase calculation; adjust the test bench speed to the test state; collect the vibration of the test bench at the speed through the data acquisition system; use data analysis software to process the test bench vibration data to obtain the vibration of the test bench plane X and Y, and based on the vector triangle rule, perform vector addition on the vibration in the X and Y directions of the test bench plane to obtain the magnitude and phase of the total vibration D of the test bench plane; determine whether the vibration magnitude of the test bench meets the test requirements. If not, it is necessary to continue to calculate, install and test the counterweight mass and phase of the current test bench vibration D until the final vibration of the test bench meets the test requirements.

[0038] Beneficial technical effects of this application:

[0039] The present invention proposes a method and device for dynamic balancing adjustment of a model rotor test bench based on vector triangles. The method is to collect vibration data of the test bench under rotor rotation and perform data analysis to obtain the vibration magnitude and phase of the test bench plane in the X and Y directions. The vibration of the test bench platform in the X and Y directions is summed based on the vector triangle rule to obtain the total vibration of the test bench plane. Then, by adding a counterweight to the rotor arm, the influence of the counterweight on the magnitude and phase of the test bench vibration is obtained. Finally, according to the influence of the counterweight on the magnitude and phase of the vibration, the total vibration of the test bench plane is dynamically balanced, and the magnitude and phase of the counterweight loading are calculated. Usually, the loaded phase is not on the rotor arm, and the mass of the counterweight needs to be decomposed on the two nearest rotor arms by the vector triangle rule. The method can realize dynamic balancing adjustment of the model rotor test bench plane in the X and Y directions at the same time, and improves the efficiency of dynamic balancing adjustment of the test bench to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic flow chart of a dynamic balancing adjustment method for a model rotor test bench based on vector triangles provided by the present invention. DETAILED DESCRIPTION

[0041] The following is an explanation of the dynamic balance adjustment method and device of the model rotor test bench based on vector triangle provided by the present invention in conjunction with the accompanying drawings.

[0042] See also Figure 1 The present invention proposes a dynamic balancing adjustment method for a model rotor test bench based on a vector triangle. Firstly, the vibrations in the X and Y directions of the test bench plane are vector-added based on the vector triangle law. Then, the influence of the counterweight on the vibration magnitude and phase is obtained by adding a counterweight to the rotor arm. Finally, according to the influence of the counterweight on the vibration magnitude and phase, the total vibration of the test bench plane is dynamically balanced, and the magnitude and phase of the counterweight loading are calculated, so as to realize the dynamic balancing adjustment of the model rotor test bench plane in the X and Y directions at the same time.

[0043] The present invention attaches a vibration sensor to a model rotor test bench to measure the vibration of the test bench when the rotor rotates, collects the vibration of the test bench under the rotation of the rotor through a data acquisition system, analyzes the vibration magnitude and phase in the X and Y directions of the test bench plane, and performs vector addition on the vibration in the X and Y directions of the test bench plane based on the vector triangle rule to obtain the total vibration A magnitude and phase in the test bench plane; then, after adding a counterweight block to the rotor support arm, data collection and processing are performed on the test bench vibration again to obtain the total vibration B magnitude and phase in the test bench plane after the counterweight is changed, and the vibration of the test bench before and after the counterweight is changed is subtracted using the vector triangle rule to obtain The influence of the counterweight on the vibration of the test bench C can be obtained by measuring the angle between the vibration A and the vibration C, and the influence of the counterweight on the vibration phase of the test bench can be obtained by calculating the ratio of the size of the vibration C to the mass of the counterweight. The influence of each gram of the counterweight on the vibration size of the test bench can be obtained. Finally, according to the influence of the counterweight on the size and phase of the vibration, the test bench vibration A is dynamically balanced, and the size and phase of the counterweight loading are calculated. Usually the loading phase is not on the rotor arm, and the vector triangle rule is used to decompose the mass of the counterweight onto the two nearest rotor arms, and finally the dynamic balance adjustment of the model rotor test bench plane in both the X and Y directions is achieved simultaneously.

[0044] The present invention uses the vector triangle law to perform vector addition on the vibrations in the X and Y directions of the test bench plane, and obtains the influence of the counterweight on the vibration magnitude and phase by adding a counterweight to the rotor arm. Based on the vector triangle law, the counterweight with calculated weight is decomposed to the nearby rotor arm, and finally the dynamic balance adjustment in the X and Y directions of the model rotor test bench plane can be achieved simultaneously.

[0045] In a specific embodiment, the present invention provides a method for adjusting the dynamic balance of a model rotor test bench based on a vector triangle, comprising the following contents:

[0046] (1) Vibration data collection and analysis of model rotor test bench

[0047] The steps for collecting and analyzing vibration data of the model rotor test bench are as follows:

[0048] Step 1: Paste a three-axis vibration sensor on the model rotor test bench to test the vibration of the test bench;

[0049] Step 2: Adjust the test bench speed to the test state;

[0050] Step 3: Collect the vibration of the test bench at this speed through the data acquisition system;

[0051] Step 4: Use data analysis software to obtain the vibrations in the X and Y directions of the test bench plane at the rotor speed. Based on the vector triangle rule, vector addition is performed on the vibrations in the X and Y directions of the test bench plane to obtain the magnitude and phase of the total vibration A of the test bench plane.

[0052] (2) Effect of counterweight on vibration of model rotor test bench

[0053] The steps to determine the effect of the counterweight on the vibration of the model rotor test bench are as follows:

[0054] Step 1: Add a known weight to one of the rotor arms.

[0055] Step 2: Collect the vibration data of the model rotor test bench in this state, and obtain the vibration B of the test bench in this state through data analysis software;

[0056] Step 3: Based on the vector triangle rule, perform vector subtraction between vibration B and vibration A to obtain vibration C;

[0057] Step 4: By measuring the angle between vibration A and vibration C, the influence of the counterweight on the vibration phase of the test bench can be obtained. By calculating the ratio of the magnitude of vibration C to the mass of the counterweight, the influence of the mass per gram of the counterweight on the vibration magnitude of the test bench can be obtained.

[0058] (3) Calculation of the weight loading mass and phase

[0059] The calculation steps of the counterweight loading mass and phase are as follows:

[0060] Step 1: According to the analysis of the dynamic balance adjustment principle, if you want to adjust the vibration A of the test bench to a state that meets the test requirements, it is best to add a counterweight block in the direction of rotating the phase of vibration A 180° clockwise;

[0061] Step 2: According to the vibration magnitude of vibration A and the influence of the mass of the counterweight on the vibration of the model rotor test bench, the weight of the counterweight that needs to be added is obtained;

[0062] Step 3: Based on the vector triangle rule, decompose the weight of the counterweight that needs to be added to the two nearest rotor arms to obtain the mass of the counterweight that needs to be loaded on each rotor arm.

[0063] (4) Dynamic balance adjustment of model rotor test bench

[0064] The steps for dynamic balance adjustment of the model rotor test bench are as follows:

[0065] Step 1: According to the loading mass and phase calculation of the counterweight block, install the counterweight block on the rotor arm of the model rotor test bench as required;

[0066] Step 2: Adjust the test bench speed to the test state;

[0067] Step 3: Collect the vibration of the test bench at this speed through the data acquisition system;

[0068] Step 4: Use data analysis software to process the vibration data of the test bench to obtain the vibration of the test bench plane X and Y. Based on the vector triangle rule, vector addition is performed on the vibration of the test bench plane in the X and Y directions to obtain the magnitude and phase of the total vibration D of the test bench plane.

[0069] Step 5: Determine whether the vibration of the test bench meets the test requirements. If not, it is necessary to continue calculating, installing and testing the mass and phase of the counterweight block for the current test bench vibration D until the final vibration of the test bench meets the test requirements.

[0070] The present invention attaches a vibration sensor to a model rotor test bench to measure the vibration of the test bench when the rotor rotates, collects the vibration of the test bench under the rotation of the rotor through a data acquisition system, analyzes the vibration magnitude and phase of the test bench plane in the X and Y directions, and performs vector addition on the vibration of the test bench plane in the X and Y directions based on the vector triangle rule to obtain the total vibration A magnitude and phase in the test bench plane; then, after adding a counterweight block to the rotor support arm, data collection and processing are performed on the test bench vibration again to obtain the total vibration B magnitude and phase in the test bench plane after the counterweight is changed, and the vibration of the test bench before and after the counterweight is changed is subtracted using the vector triangle rule to obtain the effect of the counterweight block on the vibration of the test bench Influence C. By measuring the angle between vibration A and vibration C, the influence of the counterweight on the vibration phase of the test bench can be obtained. By calculating the ratio of the size of vibration C to the mass of the counterweight, the influence of the mass per gram of the counterweight on the vibration size of the test bench can be obtained. Finally, according to the influence of the counterweight on the size and phase of the vibration, the test bench vibration A is dynamically balanced, and the size and phase of the counterweight loading are calculated. Usually, the loaded phase is not on the rotor arm, and the mass of the counterweight needs to be decomposed into two nearby rotor arms through the vector triangle rule. Finally, the dynamic balance adjustment of the model rotor test bench in the X and Y directions is achieved at the same time, which improves the dynamic balance adjustment efficiency of the test bench to a certain extent.

Claims

1. A dynamic balance adjustment method for a model rotor test bench based on vector triangle, characterized in that: include: Obtaining an initial vibration vector A of a model rotor test bench with blades installed; Obtain the amplitude and phase influence coefficients of the counterweight on the vibration of the model rotor test bench; According to the initial vibration vector A, amplitude and phase influence coefficient, the installation position and mass of two counterweights to be loaded are obtained; According to the installation position and mass of the counterweight to be loaded, two counterweights are installed on the corresponding two blade arms.

2. The dynamic balance adjustment method of the model rotor test bench based on vector triangle according to claim 1 is characterized in that: Obtain the initial vibration vector A of the model rotor test bench, including: Step 1: Paste a three-axis vibration sensor on the model rotor test bench to test the vibration of the test bench; Step 2: Adjust the test bench speed to the test state; Step 3: Collect the vibration of the test bench at this speed through the data acquisition system; Step 4: Use data analysis software to obtain the vibrations in the X and Y directions of the test bench plane at the rotor speed. Based on the vector triangle rule, vector addition is performed on the vibrations in the X and Y directions of the test bench plane to obtain the magnitude and phase of the total vibration A of the test bench plane.

3. The dynamic balance adjustment method of the model rotor test bench based on vector triangle according to claim 1 is characterized in that: Obtain the amplitude and phase influence coefficients of the counterweight on the vibration of the model rotor test bench, including: Step 1: Add a known weight to one of the rotor arms. Step 2: Collect the vibration data of the model rotor test bench in this state, and obtain the vibration B of the test bench in this state through data analysis software; Step 3: Based on the vector triangle rule, perform vector subtraction between vibration B and vibration A to obtain vibration C; Step 4: By measuring the angle between vibration A and vibration C, the phase influence coefficient of the counterweight on the vibration phase of the test bench can be obtained. By calculating the ratio of the size of vibration C to the mass of the counterweight, the amplitude influence coefficient of the mass per gram of the counterweight on the vibration size of the test bench can be obtained.

4. The dynamic balance adjustment method of the model rotor test bench based on vector triangle according to claim 1 is characterized in that: According to the initial vibration vector A, amplitude and phase influence coefficient, the installation position and mass of the two counterweights to be loaded are obtained, including: Step 1: According to the vibration magnitude of vibration A and the influence of the mass of the counterweight on the vibration of the model rotor test bench, the weight of the counterweight that needs to be added is obtained; Step 2: Based on the vector triangle rule, decompose the weight of the counterweight that needs to be added to the two nearest rotor arms to obtain the mass of the counterweight that needs to be loaded on each rotor arm.

5. The dynamic balance adjustment method of the model rotor test bench based on vector triangle according to claim 1 is characterized in that: According to the installation position and mass of the counterweight to be loaded, install the two counterweights on the corresponding two blade arms, including: Step 1: According to the loading mass and phase calculation of the counterweight block, install the counterweight block on the rotor arm of the model rotor test bench as required; Step 2: Adjust the test bench speed to the test state; Step 3: Collect the vibration of the test bench at this speed through the data acquisition system; Step 4: Use data analysis software to process the vibration data of the test bench to obtain the vibration of the test bench plane X and Y. Based on the vector triangle rule, vector addition is performed on the vibration of the test bench plane in the X and Y directions to obtain the magnitude and phase of the total vibration D of the test bench plane. Step 5: Determine whether the vibration of the test bench meets the test requirements. If not, it is necessary to continue calculating, installing and testing the mass and phase of the counterweight block for the current test bench vibration D until the final vibration of the test bench meets the test requirements.

6. A dynamic balance adjustment device for a model rotor test bench based on a vector triangle, characterized in that: include: An initial vibration vector acquisition module, used to acquire an initial vibration vector A of a model rotor test bench equipped with blades; An influence coefficient acquisition module is used to obtain the amplitude and phase influence coefficients of the counterweight block on the vibration of the model rotor test bench; The counterweight block parameter acquisition module is used to obtain the installation position and mass of two counterweight blocks to be loaded according to the initial vibration vector A, amplitude and phase influence coefficient; The adjustment module is used to install the two counterweights on the corresponding two blade support arms according to the installation position and mass of the counterweights to be loaded.

7. The dynamic balance adjustment device for a model rotor test bench based on a vector triangle according to claim 6 is characterized in that: The initial vibration vector acquisition module is used to stick a three-axis vibration sensor on the model rotor test bench frame to test the vibration of the test bench; adjust the test bench speed to the test state; collect the vibration of the test bench at the speed through the data acquisition system; obtain the vibration of the test bench plane in the X and Y directions at the rotor speed through the data analysis software, and perform vector addition on the vibration of the test bench plane in the X and Y directions based on the vector triangle law to obtain the magnitude and phase of the total vibration A of the test bench plane.

8. The dynamic balance adjustment device for a model rotor test bench based on a vector triangle according to claim 6, characterized in that: The influence coefficient acquisition module is used to add a counterweight of known weight to one of the arms of the rotor; collect vibration data of the model rotor test bench in this state, and obtain the vibration B of the test bench in this state through data analysis software; based on the vector triangle law, vector subtraction is performed on vibration B and vibration A to obtain vibration C; by measuring the angle between vibration A and vibration C, the phase influence coefficient of the influence of the counterweight on the vibration phase of the test bench can be obtained, and by calculating the ratio of the size of vibration C to the mass of the counterweight, the amplitude influence coefficient of the mass of the counterweight per gram on the vibration size of the test bench can be obtained.

9. The dynamic balance adjustment device for a model rotor test bench based on a vector triangle according to claim 6, characterized in that: The counterweight parameter acquisition module is used to obtain the weight of the counterweight that needs to be added according to the vibration size of vibration A and the influence of the counterweight mass on the vibration of the model rotor test bench; based on the vector triangle law, the weight of the counterweight that needs to be added is decomposed to the two nearest rotor arms to obtain the mass of the counterweight that needs to be loaded on each rotor arm.

10. The dynamic balance adjustment device for a model rotor test bench based on a vector triangle according to claim 6, characterized in that: The adjustment module is used to install the counterweight block on the rotor arm of the model rotor test bench as required according to the loading mass and phase calculation of the counterweight block; and adjust the speed of the test bench to the test state; The vibration of the test bench at this speed is collected through the data acquisition system; the vibration data of the test bench is processed by the data analysis software to obtain the vibration of the test bench plane X and Y, and the vibration of the test bench plane X and Y directions is vector-added based on the vector triangle rule to obtain the magnitude and phase of the total vibration D of the test bench plane; it is determined whether the vibration magnitude of the test bench meets the test requirements. If not, it is necessary to continue to calculate, install and test the mass and phase of the counterweight block of the current test bench vibration D until the final vibration of the test bench meets the test requirements.

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