A method for measuring angular offset of coupling

Abstract

A method for measuring the angular offset of a coupling comprises the following steps: measuring the diameter D1 of the outer circumferential surface of the driven half coupling flange and the diameter D2 of the outer cylindrical surface of the driven half coupling, and selecting multiple measurement surfaces on the outer circumferential surface of the driven half coupling; using the outer circumferential surface of the driving half coupling as a reference, measuring the highest and lowest points of the measurement surface on the outer circumference of the driven half coupling, and calculating the difference between the highest and lowest points; drawing a three-dimensional model based on the data, and then calculating the deflection angle α of the maximum flange surface of the driven half coupling; based on the deflection angle α of the maximum flange surface of the driven half coupling, calculating the angular offset of the driven half coupling flange surface below the measurement surface; and calculating the angular offsets corresponding to the other measurement surfaces, wherein the largest angular offset is the angular offset of the coupling to be measured. The present invention facilitates direct measurement and calculation of angular offset.

Description

Technical Field

[0001] The invention relates to an improvement of a measurement technology for the angular offset of a coupling, belongs to the field of mechanical processing measurement, and in particular to a measurement method for the angular offset of a coupling. Background Art

[0002] Couplings are generally divided into rigid couplings and flexible couplings. During assembly, flexible couplings are fixed to the shaft ends of the driving shaft and the driven shaft respectively with keys or tight fits. During the assembly process, the centering offset (radial displacement and angular displacement) of the two coupling halves must be accurately measured and adjusted to ensure that it is controlled within the corresponding allowable value range. However, since the gap between the two coupling halves is very small after assembly, the angular displacement cannot be directly detected by measuring tools, resulting in the inability to measure and adjust the centering offset according to actual production.

[0003] A patent application with application number DE102018113762.1 and application date June 8, 2018 discloses a method for measuring the angular displacement of a coupling, wherein the position of an intermediate piece arranged between a first outer connecting flange and a second outer connecting flange and transmitting force from the first outer connecting flange to the second outer connecting flange and at least one flange extension of one of the outer connecting flanges is detected and formed in the area of ​​the intermediate piece, wherein the relationship between the intermediate piece and the flange extension is determined according to the position of the intermediate piece and the flange extension, and wherein the angular offset of the intermediate piece and the flange extension can be determined based on alignment, wherein the alignment of the intermediate piece and the flange extension is determined by determining the difference between the position value recorded by the intermediate piece and the position of the recorded flange extension value, characterized in that the position of the intermediate piece and the flange extension is determined by the distance between them and at least one sensor of the position detection unit, and the intermediate piece and the flange extension are guided through this distance, but the above scheme does not solve the problem that the angular displacement cannot be directly detected by a measuring tool.

[0004] 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

[0005] The purpose of the present invention is to overcome the problem in the prior art that the angular displacement cannot be directly detected by a measuring tool, and to provide a method for measuring the angular displacement of a coupling, which is convenient for direct measurement and obtains the angular offset by calculation.

[0006] To achieve the above objectives, the technical solution of the present invention is: a method for measuring the angular offset of a coupling, wherein the coupling includes a driving half coupling and a driven half coupling, and the method for measuring the angular offset of the coupling includes the following steps:

[0007] The first step is to use the cross section of the outer circumference of the driving half coupling as the reference plane. Then, multiple measurement surfaces are selected on the outer circumference of the driven half coupling. The distance H1 between the highest point J1 of one of the measurement surfaces on the outer circumference of the driven half coupling and the reference plane O, as well as the distance H2 between the lowest point J11 and the reference plane O, are measured, and the difference between the highest point and the lowest point is calculated.

[0008] Step 2: Measure the outer diameter D1 of the driven half coupling flange and the outer cylindrical diameter D2 of the driven half coupling.

[0009] Step 3: Draw a three-dimensional model based on the values ​​of D1, D2, the highest point, and the lowest point. Then, calculate the deflection angle α of the maximum flange surface of the driven half coupling based on the three-dimensional model.

[0010] Step 4: Calculate the angular offset of the flange surface of the driven half coupling under the test surface based on the maximum deflection angle α of the flange surface of the driven half coupling;

[0011] Step 5. Calculate the angular offsets corresponding to other surfaces to be measured according to the above steps, compare all the angular offsets, and the largest angular offset is the angular offset of the coupling to be measured.

[0012] In the first step, selecting a plurality of measurement surfaces on the outer circumference of the driven half coupling specifically means selecting a plurality of measurement surfaces equally divided along the generatrix direction on the outer circumference of the driven half coupling.

[0013] The multiple measuring surfaces are preferably three, specifically:

[0014] The midline plane on the outer circumference of the driven half coupling in the generatrix direction is the first measuring plane;

[0015] The section near the driven end half coupling flange is the second measuring surface;

[0016] The section away from the flange end of the driven half coupling is the third measuring plane.

[0017] In the first step, the distance H1 between the highest point J1 of one of the measured surfaces on the outer circumference of the driven end half coupling and the reference plane O and the distance H2 between the lowest point J11 and the reference plane O are measured, including the following steps:

[0018] A. Install the passive half coupling onto the driven shaft;

[0019] B. Fix the testing instrument on the outer surface of the driving half coupling, adjust the dial indicator to zero, and press the probe against the outer surface of the driven half coupling without any gap.

[0020] C. Rotate the driven half coupling along the rotation centerline for one turn, and record the highest and lowest points of the dial indicator during the rotation.

[0021] D. Measure the reading S1 corresponding to the highest point A on the measuring surface, and measure the reading S2 corresponding to the lowest point B on the measuring surface.

[0022] In the first step, the difference between the highest point and the lowest point is calculated as follows:

[0023] △H A =S1-S2.

[0024] The distance from the highest point A on the measuring surface to the centerline of rotation is H1, and the distance from the lowest point B on the measuring surface to the centerline of rotation is H2. The difference between H2 and H1 is:

[0025] △H B =H2-H1.

[0026] The difference between the measured values ​​corresponding to the highest point and the lowest point: △H A =S1-S2; the difference between H2 and H1 △H B =H2-H1; we can get: △H=△H A =△H B .

[0027] The detection instrument is a dial indicator.

[0028] The deflection angle α of the maximum flange surface of the driven end half coupling calculated based on the three-dimensional model is specifically:

[0029] The axial distance from the measuring point to the flange surface of the driven half coupling is L. The inclination angle of the maximum flange surface of the driven half coupling with the rotation centerline as the reference can be obtained from the following formula based on the geometric relationship between the parameters L, D2, α, △H, H2 and H1:

[0030] H2=D2*cosα+L*sinα+D2*sinα*tgα;

[0031] H1=D2*cosα- L*sinα;

[0032] At this time, △H=△H A =△H B =D2*tgα*sinα+2*L*sinα.

[0033] The angular offset T of the driven half coupling flange surface is calculated based on the maximum flange surface deflection angle α of the driven half coupling as follows:

[0034] Based on the geometric relationship between the angular offset T, the flange diameter D1 of the driven half coupling, and the flange angle α, the following formula can be obtained:

[0035] T=D1*sinα;

[0036] Where D1 is the flange diameter of the driven half coupling.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. In a method for measuring the angular offset of a coupling of the present invention, a plurality of measuring surfaces are equally divided along the busbar direction on the outer circumference of the driven half coupling of the flexible coupling, and the outer circumferential surface of the driving half coupling is used as a reference to detect the difference between the highest point and the lowest point on the plurality of measuring surfaces on the driven half coupling one by one. The sampling method of multiple measuring surfaces can obtain the angular offset information of the coupling more comprehensively. Since the angular offset of the flexible coupling in actual work may vary at different positions, the method of multiple measuring surfaces can cover more possibilities, reduce the risk of measurement error caused by local special circumstances, thereby improving the accuracy of the measurement results. Then, the multiple measuring surfaces of the grade coupling can be obtained one by one by using mathematical modeling and calculation. The corresponding angular offset value is accurate. This relative difference measurement method has high stability and is not affected by slight fluctuations in the absolute position of the measurement reference itself. It can more accurately reflect the angular offset of each measuring surface. The angular offset of each measuring surface is then derived through mathematical modeling and calculation, further ensuring the accuracy of the result. The largest of the multiple angular offset values ​​obtained is selected as the angular offset of the coupling to be measured. The maximum angular offset value better represents the overall offset condition of the coupling, avoiding incorrect judgments about the working state of the coupling due to improper selection of values. This achieves accurate measurement of the angular displacement of the flexible coupling and solves the problem that the angular displacement of the flexible coupling cannot be directly detected using a measuring instrument. Therefore, the present invention facilitates direct measurement and calculation of angular offset.

[0039] 2. The present invention provides a method for measuring the angular offset of a coupling. Through indirect relative measurement, the difference between the highest and lowest points of multiple measuring surfaces and subsequent mathematical calculations achieves precise measurement of the angular displacement of a flexible coupling. This method meets the need for precise measurement and adjustment of angular offset during assembly of flexible couplings, helps improve the assembly quality of flexible couplings, and thereby ensures their normal operation in transmission systems and extends their service life. Therefore, the present invention ensures assembly accuracy and extends service life.

[0040] 3. The present invention provides a method for measuring the angular offset of a coupling. This method is highly practical in engineering practice and does not require special or complex measuring equipment. It only uses the outer surface of the active half coupling as a reference and conventional measuring tools to measure the difference between the highest and lowest points. This method is easy for engineers to master and implement. Furthermore, since it does not require the purchase of expensive specialized measuring equipment, existing conventional measuring tools can be used for measurement, reducing measurement costs. Therefore, the present invention provides simple measurement and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a measurement schematic diagram of the present invention.

[0042] Figure 2 It is a schematic diagram of the positions of the three measuring surfaces in the present invention.

[0043] Figure 3 It is a top view of the geometric relationship diagram among the measurement-related parameters H2, L, D2 and α in the present invention.

[0044] Figure 4 : is a geometric relationship diagram among the measurement-related parameters H1, L, D2 and α in the present invention.

[0045] Figure 5 It is a geometric relationship diagram between the measurement-related parameters T and α in the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] See also Figures 1 to 5 A method for measuring the angular offset of a coupling, wherein the coupling comprises a driving half coupling and a driven half coupling, and the method for measuring the angular offset of the coupling comprises the following steps:

[0048] The first step is to measure the diameter D1 of the outer surface of the driven half coupling flange and the diameter D2 of the outer cylindrical surface of the driven half coupling, and then select multiple measurement surfaces on the outer circumference of the driven half coupling;

[0049] Step 2: Using the cross section of the outer circumference of the driving half coupling as the reference plane, measure the values ​​of the highest point and the lowest point on one of the measured surfaces on the outer circumference of the driven half coupling and the reference plane, and calculate the difference between the highest point and the lowest point;

[0050] Step 3: Draw a three-dimensional model based on the values ​​of D1, D2, the highest point, and the lowest point. Then, calculate the deflection angle α of the maximum flange surface of the driven half coupling based on the three-dimensional model.

[0051] Step 4: Calculate the angular offset of the flange surface of the driven half coupling under the test surface based on the maximum deflection angle α of the flange surface of the driven half coupling;

[0052] Step 5. Calculate the angular offsets corresponding to other surfaces to be measured according to the above steps, compare all the angular offsets, and the largest angular offset is the angular offset of the coupling to be measured.

[0053] In the first step, selecting a plurality of measurement surfaces on the outer circumference of the driven half coupling specifically means: selecting a plurality of measurement surfaces on the outer circumference of the driven half coupling equally along the generatrix direction.

[0054] The multiple measuring surfaces are preferably three, specifically:

[0055] The midline plane on the outer circumference of the driven half coupling in the generatrix direction is the first measuring plane;

[0056] The section near the driven end half coupling flange is the second measuring surface;

[0057] The section away from the flange end of the driven half coupling is the third measuring plane.

[0058] In the first step, the distance H1 between the highest point J1 of one of the measured surfaces on the outer circumference of the driven half coupling and the reference plane O and the distance H2 between the lowest point J11 and the reference plane O are measured, including the following steps:

[0059] A. Install the passive half coupling onto the driven shaft;

[0060] B. Fix the testing instrument on the outer surface of the driving half coupling, adjust the dial indicator to zero, and press the probe against the outer surface of the driven half coupling without any gap.

[0061] C. Rotate the driven half coupling along the rotation centerline for one turn, and record the highest and lowest points of the dial indicator during the rotation.

[0062] D. Measure the reading S1 corresponding to the highest point A on the measuring surface, and measure the reading S2 corresponding to the lowest point B on the measuring surface.

[0063] In the first step, the difference between the highest point and the lowest point is calculated as follows:

[0064] △H A =S1-S2.

[0065] The distance from the highest point A on the measuring surface to the centerline of rotation is H1, and the distance from the lowest point B on the measuring surface to the centerline of rotation is H2. The difference between H2 and H1 is:

[0066] △H B=H2-H1.

[0067] The difference between the measured values ​​corresponding to the highest point and the lowest point: △H A = S1- S2; the difference between H2 and H1 is △H B =H2-H1; we can get: △H=△H A =△H B .

[0068] The detection instrument is a dial indicator.

[0069] The deflection angle α of the maximum flange surface of the driven end half coupling calculated based on the three-dimensional model is specifically:

[0070] The axial distance from the measuring point to the flange surface of the driven half coupling is L. The inclination angle of the maximum flange surface of the driven half coupling with the rotation centerline as the reference can be obtained from the following formula based on the geometric relationship between the parameters L, D2, α, △H, H2 and H1:

[0071] H2=D2*cosα+L*sinα+D2*sinα*tgα;

[0072] H1=D2*cosα- L*sinα;

[0073] At this time, △H=△H A = H B =D2*tgα*sinα+2*L*sinα.

[0074] The angular offset T of the driven half coupling flange surface is calculated based on the maximum flange surface deflection angle α of the driven half coupling as follows:

[0075] Based on the geometric relationship between the angular offset T, the flange diameter D1 of the driven half coupling, and the flange angle α, the following formula can be obtained:

[0076] T=D1*sinα;

[0077] Where D1 is the flange diameter of the driven half coupling.

[0078] The supplementary description of the present invention is as follows:

[0079] By directly selecting a measuring surface on the outer circumference of the driven half coupling and measuring with the driving end as the reference, data related to angular offset can be intuitively obtained. Since the angular offset of the coupling will ultimately be reflected in the change in the circumferential position of the driven end relative to the driving end, by measuring the highest and lowest points on the circumference, data can be directly collected based on the external manifestation of angular offset. Example

[0080] A method for measuring the angular offset of a coupling, wherein the coupling comprises a driving half coupling and a driven half coupling, and the method for measuring the angular offset of the coupling comprises the following steps:

[0081] The first step is to use the cross section of the outer circumference of the driving half coupling as the reference plane. Then, multiple measurement surfaces are selected on the outer circumference of the driven half coupling. The distance H1 between the highest point J1 of one of the measurement surfaces on the outer circumference of the driven half coupling and the reference plane O, as well as the distance H2 between the lowest point J11 and the reference plane O, are measured, and the difference between the highest point and the lowest point is calculated.

[0082] Step 2: Measure the outer diameter D1 of the driven half coupling flange and the outer cylindrical diameter D2 of the driven half coupling.

[0083] Step 3: Draw a three-dimensional model based on the values ​​of D1, D2, the highest point, and the lowest point. Then, calculate the deflection angle α of the maximum flange surface of the driven half coupling based on the three-dimensional model.

[0084] Step 4: Calculate the angular offset of the flange surface of the driven half coupling under the test surface based on the maximum deflection angle α of the flange surface of the driven half coupling;

[0085] Step 5. Calculate the angular offsets corresponding to other surfaces to be measured according to the above steps, compare all the angular offsets, and the largest angular offset is the angular offset of the coupling to be measured. Example

[0086] Example 2 is basically the same as Example 1, except that:

[0087] Selecting a measuring surface on the outer circumference of the driven half coupling means selecting multiple measuring surfaces equally along the generatrix direction on the outer circumference of the driven half coupling, and preferably selecting three measuring surfaces; Figure 2 As shown, three measuring surfaces are equally divided along the generatrix direction on the outer circumference of the driven half coupling. Preferably, the center dividing surface J1J1 located on the generatrix direction on the outer circumference of the driven half coupling is the first measuring surface; the section J2J2 close to the flange of the driven half coupling is the second measuring surface; and the section J3J3 away from the end of the driven half coupling flange is the third measuring surface.

[0088] When applied: It is relatively simple to select the outer circumference as the measuring surface and to use the outer circumference of the active end as the reference for measurement. It does not require complex auxiliary devices or special measurement environments. Only suitable measuring tools are needed for measurement. Example

[0089] Example 3 is basically the same as Example 1, except that:

[0090] Taking the outer circumference of the driving half coupling as a reference, measuring the values ​​of the highest point and the lowest point of one of the surfaces to be measured on the outer circumference of the driven half coupling, including the following steps:

[0091] A. Install the passive half coupling onto the driven shaft;

[0092] B. Fix the dial indicator on the outer surface of the driving half coupling. After adjusting the dial indicator to zero, press the probe onto the outer surface of the driven half coupling without any gap.

[0093] Before installing the passive half-coupling to the driven shaft, clean the mounting surfaces of the driven shaft and half-coupling to remove oil, dust, and impurities. Also, check whether the mounting surfaces are damaged, such as scratches or bumps. If any damage is found, repair or replace it.

[0094] C. Rotate the driven half coupling along the rotation centerline for one turn, and record the highest and lowest points of the dial indicator during the rotation.

[0095] After recording the highest and lowest points, repeat the steps at least three times. Each time you measure, you must accurately record the highest and lowest points of the dial indicator during one rotation. Then, average the highest and lowest points obtained from multiple measurements to reduce random errors in the measurement process.

[0096] D. Measure the reading S1 corresponding to the highest point A on the measuring surface, and measure the reading S2 corresponding to the lowest point B on the measuring surface.

[0097] The operation process facilitates quality control during the production process. If the measurement results are abnormal, they can be traced back based on the detailed operation records to find the possible problem links, such as whether there are deviations during the installation process or whether there are any illegal operations during the measurement process.

[0098] The difference between the highest point and the lowest point is calculated as follows:

[0099] △H A =S1-S2.

[0100] The distance from the highest point A on the measuring surface to the centerline of rotation is H1, and the distance from the lowest point B on the measuring surface to the centerline of rotation is H2. The difference between H2 and H1 is:

[0101] △H B =H2-H1.

[0102] The difference between the measured values ​​corresponding to the highest point and the lowest point: △H A =S1-S2; the difference between H2 and H1 △H B =H2-H1; we can get: △H=△HA =△H B .

[0103] DE=L*sinα; EF=D2 / 2*cosα; MN=D2*sinα*tgα;

[0104] H2=DE+EF+MN=D2 / 2*cosα+L*sinα+D2*sinα*tgα;

[0105] DE=L*sinα;EP=D2 / 2*cosα;

[0106] H1=EP-DE=D2 / 2*cosα-L*sinα. Example

[0107] Example 4 is basically the same as Example 1, except that:

[0108] like Figure 4 As shown, the deflection angle α of the maximum flange surface of the driven half coupling calculated based on the three-dimensional model is specifically: the axial distance from the measuring point to the flange surface of the driven half coupling is L, and the inclination angle of the maximum flange surface of the driven half coupling is based on the rotation centerline. The geometric relationship between the parameters L, D2, α, △H, H2 and H1 can be obtained by the following formula;

[0109] H2=D2*cosα+L*sinα+D2*sinα*tgα;

[0110] H1=D2*cosα- L*sinα;

[0111] At this time, △H=△H A =△H B =D2*tgα*sinα+2*L*sinα.

[0112] The angular offset T of the driven end half coupling flange surface is calculated based on the maximum deflection angle α of the driven end half coupling as follows: According to the geometric relationship between the angular offset T, the driven end half coupling flange surface diameter D1 and the deflection angle α of the flange surface, the following formula can be obtained: T=D1*sinα; wherein D1 is the driven end half coupling flange surface diameter.

[0113] 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 measuring the angular offset of a coupling, wherein the coupling comprises a driving half coupling and a driven half coupling, characterized in that: The method for measuring the angular offset of the coupling comprises the following steps: The first step is to use the cross section of the outer circumference of the driving half coupling as the reference plane. Then, multiple measuring surfaces are selected on the outer circumference of the driven half coupling. The distance H1 between the highest point J1 of one of the measuring surfaces on the outer circumference of the driven half coupling and the reference plane O, as well as the distance H2 between the lowest point J11 and the reference plane O, are measured. The difference between the highest point and the lowest point is calculated. Measuring the distance H1 between the highest point J1 of one measuring surface on the outer circumference of the driven end half coupling and the reference plane O, and the distance H2 between the lowest point J11 and the reference plane O, includes the following steps: A. Install the passive half coupling onto the driven shaft; B. Fix the testing instrument on the outer surface of the driving half coupling, adjust the dial indicator to zero, and press the probe against the outer surface of the driven half coupling without any gap. C. Rotate the driven half coupling along the rotation centerline for one turn, and record the highest and lowest points of the dial indicator during the rotation. D. Measure the reading S1 corresponding to the highest point A on the measuring surface, and measure the reading S2 corresponding to the lowest point B on the measuring surface; And calculate the difference between the highest point and the lowest point specifically as: <h2 style=";text-align:left;direction:ltr">△H<h2 style=";text-align:left;direction:ltr"> A <h2 style=";text-align:left;direction:ltr"> =S1-S2; The distance from the highest point A on the measuring surface to the centerline of rotation is H1, and the distance from the lowest point B on the measuring surface to the centerline of rotation is H2. The difference between H2 and H1 is: △H B =H2-H1; Step 2: Measure the outer diameter D1 of the driven half coupling flange and the outer cylindrical diameter D2 of the driven half coupling. Step 3: Draw a three-dimensional model based on the values ​​of D1, D2, the highest point, and the lowest point. Then, calculate the deflection angle α of the maximum flange surface of the driven half coupling based on the three-dimensional model. The deflection angle α of the maximum flange surface of the driven end half coupling calculated based on the three-dimensional model is specifically: The axial distance from the measuring surface to the flange surface of the driven half coupling is L. The inclination angle of the maximum flange surface of the driven half coupling with the rotation centerline as the reference is obtained from the geometric relationship between the parameters L, D2, α, △H, H2 and H1. H2=D2*cosα+L*sinα+D2*sinα*tgα; H1=D2*cosα- L*sinα; At this time, △H=△H A =△H B =D2*tgα*sinα+2*L*sinα; Step 4: Based on the deflection angle α of the maximum flange surface of the driven half coupling, calculate the angular offset of the flange surface of the driven half coupling under the measuring surface; Step 5. Calculate the angular offsets corresponding to other measuring surfaces according to the above steps, and compare all the angular offsets. The largest angular offset is the angular offset of the coupling to be measured.

2. The method for measuring the angular offset of a coupling according to claim 1, wherein: In the first step, selecting a plurality of measuring surfaces on the outer circumference of the driven half coupling specifically means: selecting a plurality of measuring surfaces on the outer circumference of the driven half coupling equally along the generatrix direction.

3. The method for measuring the angular offset of a coupling according to claim 2, wherein: The number of the plurality of measuring surfaces is three, specifically: The midline plane on the outer circumference of the driven half coupling in the generatrix direction is the first measuring plane; The section near the driven end half coupling flange is the second measuring surface; The section away from the flange end of the driven half coupling is the third measuring plane.

4. The method for measuring the angular offset of a coupling according to claim 1, wherein: The detection instrument is a dial indicator.

5. The method for measuring the angular offset of a coupling according to claim 1, wherein: The angular offset T of the driven half coupling flange surface is calculated based on the maximum flange surface deflection angle α of the driven half coupling as follows: Based on the geometric relationship between the angular offset T, the flange diameter D1 of the driven half coupling, and the flange angle α, the following formula can be obtained: T=D1*sinα; Where D1 is the flange diameter of the driven half coupling.

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