A high-precision installation alignment method for a diaphragm coupling

Abstract

The application relates to the field of diaphragm couplings, in particular to a high-precision installation alignment method of a diaphragm coupling, which comprises the following steps: S1, machining a tool mounting hole on the diaphragm coupling; S2, machining a distance setting sleeve: machining the axial size of the distance setting sleeve according to the axial distance d of the diaphragm body, machining the same grinding for all the distance setting sleeves, and improving the consistency of the outer circle size and the axial size of all the distance setting sleeves; S3, installing the distance setting sleeve; S4, measuring the axial size of the diaphragm coupling; S5, measuring the dynamic balance of the diaphragm coupling; S6, measuring and adjusting the thickness of the pad; S7, reserving an installation distance; S8, measuring the actual installation distance; S9, adjusting the thickness of the pad through matching grinding; and S10, overall installation. The application has the effect of helping to meet the high-precision installation requirement of the diaphragm coupling proposed by a specific use environment.

Description

Technical Field

[0001] This application relates to the field of diaphragm couplings, and in particular to a high-precision installation and alignment method for diaphragm couplings. Background Technology

[0002] A diaphragm coupling is a type of coupling that transmits power and torque through a group of thin plates made of alloy steel. It has been widely used due to its advantages, including small size, no need for lubrication, simple structure, easy assembly and disassembly, and strong adaptability.

[0003] The additional load introduced into the rotor system by misalignment of the coupling will couple with the load applied to the rotor system during reliability testing, making the loading complex and inaccurate, and causing the system to vibrate significantly.

[0004] The conventional installation method for diaphragm couplings is to install them according to the installation distance specified in the diaphragm coupling drawings (generally within millimeters). This installation method can meet the general usage requirements of diaphragm couplings. However, due to axial installation errors, this method often causes phenomena such as bending deformation of the diaphragm along the axial direction. When diaphragm couplings are used in equipment with high vibration control requirements, or in high-speed, heavy-load conditions where the installation accuracy of transmission system components is high, if the axial installation accuracy of the diaphragm coupling is poor, the diaphragm is initially in a state of compression, tension, or bending, and the equipment at both ends of the coupling does not have a forced limiting structure in the axial direction, it will have a relatively adverse effect on the vibration characteristics of the equipment or transmission system connected by the diaphragm coupling.

[0005] Therefore, given the high-precision installation requirements of diaphragm couplings in specific operating environments, the installation and alignment methods for diaphragm couplings need further optimization and improvement. Summary of the Invention

[0006] To meet the high-precision installation requirements of diaphragm couplings in specific operating environments, this application provides a high-precision installation and alignment method for diaphragm couplings.

[0007] This application provides a high-precision installation and alignment method for diaphragm couplings, employing the following technical solution: A high-precision installation and alignment method for diaphragm couplings includes the following steps: S1. Machining tooling mounting holes on the diaphragm coupling: ① The intermediate shaft section is machined into a through hole, and the coupling mounting flange is machined into a threaded hole with the same circular distribution as the through hole. The through hole and the threaded hole are offset from the radial outer contour of the diaphragm body. ② If the diaphragm coupling already has the above-mentioned through holes and threaded holes, then measure the position of all the through holes and threaded holes. If the position meets the requirements, then use the existing through holes and threaded holes. Otherwise, rotate the diaphragm coupling by a certain angle and then reprocess the through holes and threaded holes in the manner of step ①. S2. Machining the spacer sleeve: Machining the axial dimension of the spacer sleeve according to the axial distance d of the diaphragm body, and grinding all the spacer sleeves together to improve the consistency of the outer diameter and axial dimension of all the spacer sleeves; S3. Install the spacer sleeve: ① Pair the spacer sleeve and the screw and weigh them. One spacer sleeve and one screw constitute a component. Adjust the weight of the component by grinding the outer circle of the spacer sleeve and the screw to ensure that the weight difference between the components is ≤0.1g. ② Install the spacer sleeve between the intermediate shaft section of the diaphragm and the mounting flange of the diaphragm coupling, and make the two ends of the spacer sleeve connected to the through hole and the threaded hole respectively. The screw passes through the through hole, the spacer sleeve and the threaded hole in sequence, so that the diaphragm coupling forms a rigid whole. S4. Measurement of axial dimension of diaphragm coupling: After the spacer sleeve is installed, use a high-precision caliper to measure the overall length S of the diaphragm coupling; S5. Dynamic balance measurement of diaphragm coupling: With the spacer sleeve installed, perform overall dynamic balance measurement of the diaphragm coupling, and adjust the diaphragm coupling to remove the imbalance. S6. Measure the thickness of the adjustment pad: Measure the thickness of the adjustment pad at 8 evenly distributed points, and take the minimum value as h0; S7. Reserved installation distance: When aligning the first and second equipment mounting flanges radially and end faces according to technical requirements, reserve and fix the installation distance L0 between the first and second equipment mounting flanges based on the actual axial measurement dimension S of the diaphragm coupling and the thickness h0 of the adjusting shim. S8. Measure the actual installation distance: Measure the actual installation distance between the first equipment mounting flange and the second equipment mounting flange, and take the average value as the actual installation distance L; S9. Grinding adjustment shim thickness: Based on the actual installation distance L and the actual axial measurement dimension S of the coupling, the grinding adjustment shim thickness h=LS; S10. Overall installation: The first equipment mounting flange, diaphragm coupling and the second equipment mounting flange are sequentially fixed and connected by fixing bolts to form an integral component. During the installation and operation of the integral component, the spacer sleeve and screws are removed.

[0008] Optionally, in step S1, the positional tolerance of the through hole and the threaded hole is less than 0.05 mm.

[0009] Optionally, in step S2, the axial dimension of the spacer sleeve is controlled within the theoretical dimension d ± 0.05 mm.

[0010] Optionally, in step S4, measuring the overall length S of the diaphragm coupling using a high-precision caliper specifically involves: measuring and recording eight evenly distributed measurement points around the circumference of the diaphragm coupling; the difference in the eight measured dimensions is ≤0.05mm, and the average value of the eight measured dimensions is calculated; if the difference in the eight measured dimensions is >0.05mm, the diaphragm coupling is disassembled, and the parallelism accuracy of the intermediate shaft section and the coupling mounting flange is checked respectively, and ground as needed.

[0011] Optionally, in step S7, L0 = S + h0 (0 - 0.5).

[0012] Optionally, in step S8, when measuring the actual installation distance between the first equipment mounting flange and the second equipment mounting flange, eight measuring points are evenly distributed along the circumference of the diaphragm coupling.

[0013] Optionally, in step S9, after the adjustment pad is fitted and ground, the actual thickness of the adjustment pad is measured, and eight measuring points are evenly distributed around the circumference of the adjustment pad and the measurements are recorded. The difference in the measured dimensions at the eight points of the adjustment pad is ≤0.03mm.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. The method proposed in this application allows for precise measurement of the actual installation distance L and the actual length S of the diaphragm coupling, which helps to maintain a high degree of consistency between the installation space L at both ends of the diaphragm coupling and the actual length (S+h) of the diaphragm coupling, thereby improving the axial installation accuracy of the diaphragm coupling.

[0015] 2. The axial dimension d of the spacer sleeve is precisely controlled according to the axial dimension of the diaphragm body of the diaphragm coupling.

[0016] 3. Accurately measure the actual installation dimension S of the diaphragm coupling by installing a tooling spacer sleeve.

[0017] 4. Install the spacer sleeve to make the diaphragm coupling a rigid, integral component, and perform overall dynamic balancing on the diaphragm coupling. Before dynamic balancing, reduce the influence of the spacer sleeve and screws on the dynamic balance of the diaphragm coupling by using the spacer sleeve as a counterweight and ensuring the positional accuracy of the through holes and threaded holes, thereby improving the operating accuracy of the diaphragm coupling.

[0018] 5. An adjusting shim is provided, and the axial distance is precisely adjusted by grinding the thickness h of the adjusting shim. Compared with the solution of not providing an adjusting shim and directly controlling the axial installation distance L between the first and second equipment mounting flanges to be equal to the coupling length S, the difficulty of installation alignment is reduced and the installation accuracy is more controllable.

[0019] 6. A method is proposed to use calipers to measure the length of the diaphragm coupling and the thickness of the adjusting shim at multiple evenly distributed points. This method is used to evaluate and control the accuracy of the diaphragm coupling itself and the parallelism of the adjusting shim, which effectively improves the installation and operation accuracy of the coupling. This method is simple, reliable and highly practical. Attached Figure Description

[0020] Figure 1 This is a flowchart of a high-precision installation and alignment method for a diaphragm coupling according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the connection structure of the first equipment mounting flange, the diaphragm coupling, and the second equipment mounting flange in the embodiments of this application.

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. First equipment mounting flange; 2. Adjusting shim; 3. Fixing bolt; 4. Spacer sleeve; 5. Screw; 6. Diaphragm coupling; 61. Intermediate shaft section; 62. Diaphragm body; 63. Coupling mounting flange; 64. Through hole; 65. Threaded hole; 7. Second equipment mounting flange. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0025] This application discloses a high-precision installation and alignment method for diaphragm couplings. (Refer to...) Figure 1-3 The high-precision installation and alignment method for diaphragm couplings includes the following steps: S1. Machining tooling mounting holes on the diaphragm coupling 6: ① The diaphragm coupling 6 is disassembled into an intermediate shaft section 61, two diaphragm bodies 62 and two coupling mounting flanges 63. The two coupling mounting flanges 63 are located at both ends of the intermediate shaft section 61, and the diaphragm bodies 62 are located between the ends of the intermediate shaft section 61 and the coupling mounting flanges 63. One part of the diaphragm body 62 is connected to the end of the intermediate shaft section 61 by bolts, and the other part of the diaphragm body 62 is connected to the coupling mounting flanges 63 by bolts.

[0026] A through hole 64 is machined at the end of the intermediate shaft section 61. The coupling mounting flange 63 is machined into a threaded hole 65 with the same distribution circle as the through hole 64. Before drilling, the zero point of the angle is determined by scribing. Three holes are drilled at each end of the intermediate shaft section 61, and it is confirmed that the three holes can be staggered from the outer contour of the diaphragm body 62. Two × 3 × φ9 mm holes are evenly drilled at both ends of the intermediate shaft section 61 (with a distribution circle of φ210 mm). Two × 3 × M8-7H holes are evenly drilled at the two coupling mounting flanges 63 (with a distribution circle of φ210 mm), and the positional accuracy requirement is less than φ0.05 mm.

[0027] ② If the diaphragm coupling 6 already has the above-mentioned through holes 64 and threaded holes 65, then measure the position of all through holes 64 and threaded holes 65. If the position meets the requirements, then use the existing through holes 64 and threaded holes 65. Otherwise, rotate the diaphragm coupling 6 by a certain angle and then re-machine the through holes 64 and threaded holes 65 in the manner of step ①. S2. Machining the spacer sleeve 4: The theoretical dimension d=15mm at the design point of the diaphragm body 62 is obtained from the query. Based on the theoretical axial distance d of the diaphragm body 62, the axial dimension of the spacer sleeve 4 is machined. The axial dimension of the spacer sleeve 4 is φ15×φ9×15mm, and the axial dimension is controlled at 15±0.05mm. The outer circle of the spacer sleeve 4 is machined by processing and cutting in the same batch. The axial dimensions of the six sets of spacer sleeves 4 are ground at the same time to improve the consistency of the outer circle dimensions and axial dimensions of all spacer sleeves 4. S3. Install the spacer sleeve 4: ① Weigh the spacer sleeve 4 and screw 5 together. Weigh the spacer sleeve 4 and screw 5 separately and perform rough weight adjustment. The weight difference between the spacer sleeve 4 and screw 5 should be ≤0.5g. Additionally, one spacer sleeve 4 and one screw 5 constitute one component. Adjust the weight of the component by grinding the outer circle of the spacer sleeve 4 and the screw 5 to ensure that the weight difference between the components is ≤0.1g, and mark them as paired. ② Install the spacer sleeve 4 between the intermediate shaft section 61 of the diaphragm and the mounting flange of the diaphragm coupling 6, and make the two ends of the spacer sleeve 4 connected to the through hole 64 and the threaded hole 65 respectively. The screw 5 passes through the through hole 64, the spacer sleeve 4 and the threaded hole 65 in sequence, so that the diaphragm coupling 6 forms a rigid whole. S4. Axial dimension measurement of diaphragm coupling 6: With the spacer sleeve 4 installed, the overall length S of diaphragm coupling 6 is measured using high-precision calipers. Eight measuring points are evenly distributed around the circumference of diaphragm coupling 6, and the measurements are recorded. The difference in the eight measured dimensions is ≤0.05mm, and the average value of the eight measured dimensions is calculated. If the difference in the eight measured dimensions is >0.05mm, diaphragm coupling 6 is disassembled, and the parallelism accuracy of the intermediate shaft section 61 and coupling mounting flange 63 is checked. Grinding is performed as needed. The measured values ​​are 392.11, 392.13, 392.20, 392.20, 392.13, 392.12, 392.12, and 392.11, in millimeters. Disassembling diaphragm coupling 6 and measuring the intermediate shaft section 61 and coupling mounting flange 63 with a coordinate measuring machine reveals relatively low form and position accuracy. Using the outlet of the coupling mounting flange 63 as a reference, grind the parallelism of the four surfaces of the intermediate shaft section 61, the coupling mounting flange 63, and the diaphragm coupling 6, and then assemble the diaphragm coupling 6. Measure the axial length S of the diaphragm coupling 6 again; the values ​​are 392.00, 392.00, 392.02, 392.02, 392.02, 392.04, 392.04, and 392.04 mm. Take the value of S as 392.02 mm.

[0028] S5. Dynamic balance measurement of diaphragm coupling 6: With the spacer sleeve 4 installed, perform overall dynamic balance measurement on diaphragm coupling 6, perform dynamic balance on diaphragm coupling 6 according to G1 grade accuracy, and adjust diaphragm coupling 6 to remove unbalance. S6. Measure the thickness of adjustment shim 2: Use a micrometer to measure the thickness h0 of adjustment shim 2 at 8 evenly spaced points around its circumference: 25.375, 25.385, 25.390, 25.395, 25.385, 25.380, 25.375, 25.370, in millimeters. Take the minimum value as h0, which is 25.370 mm.

[0029] S7. Reserved installation distance: The first equipment mounting flange 1 and the second equipment mounting flange 7 are aligned radially and end-face according to technical requirements. The radial runout is required to be ≤0.10mm and the end-face runout is required to be ≤0.08mm. The reserved distance between the first equipment mounting flange 1 and the second equipment mounting flange 7 is controlled by L0=S+h0(0-0.5), that is, L0=25.370+392.02(0-0.5), in millimeters. The first equipment mounting flange 1 is the mounting flange for the variable frequency drive motor equipment. S8. Measure the actual installation distance: Take 8 measuring points evenly distributed around the circumference of the diaphragm coupling 6 and measure the actual installation distance between the first equipment mounting flange 1 and the second equipment mounting flange 7. The measured distances are 417.00, 417.02, 417.04, 417.06, 417.08, 417.06, 417.04, and 417.02 mm. Take the average value as the actual installation distance L. The actual value of L is 417.04 mm. S9. Thickness of Adjusting Shim 2: Based on the actual installation distance L and the actual axial measurement dimension S of the coupling, the thickness h of adjusting shim 2 is h=LS, and the grinding is performed with h being 25.02±0.01mm. After the adjusting shim 2 is ground, the actual thickness of adjusting shim 2 is measured. Eight measuring points are evenly distributed around the circumference of adjusting shim 2, and the measurements are recorded. The difference in the measured dimensions at the eight points is ≤0.03mm. The thicknesses at the eight evenly distributed points around the circumference of adjusting shim 2 are: 25.010, 25.010, 25.015, 25.02, 25.02, 25.015, 25.01, 25.01, in millimeters, which meets the usage requirements.

[0030] S10. Overall installation: Remove the spacer sleeve 4 and screws 5, and then connect the first equipment mounting flange 1, diaphragm coupling 6 and the second equipment mounting flange 7 in sequence with fixing bolts 3 to form an integral part. The diaphragm coupling 6 has been correctly installed in the rotor system, and the high-precision installation and alignment of the diaphragm coupling 6 is completed.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision installation and alignment method for diaphragm couplings, characterized in that, Includes the following steps: S1. Machining tooling mounting holes on the diaphragm coupling (6): ① The intermediate shaft section (61) is machined into a through hole (64), and the coupling mounting flange (63) is machined into a threaded hole (65) with the same distribution circle as the through hole (64). The through hole (64) and the threaded hole (65) are offset from the radial outer contour of the diaphragm body (62). ② If the diaphragm coupling (6) already has the above-mentioned through holes (64) and threaded holes (65), then measure the position of all the through holes (64) and threaded holes (65). If the position meets the requirements, then use the existing through holes (64) and threaded holes (65). Otherwise, rotate the diaphragm coupling (6) by a certain angle and then re-machine the through holes (64) and threaded holes (65) in the manner of step ①. S2, Machining the spacer sleeve (4): Machining the axial dimension of the spacer sleeve (4) according to the axial distance d of the diaphragm body (62), and grinding all the spacer sleeves (4) together to improve the consistency of the outer circle dimension and axial dimension of all the spacer sleeves (4); S3. Install the spacer sleeve (4): ① Pair and weigh the spacer sleeve (4) and screw (5). One spacer sleeve (4) and one screw (5) constitute a component. Adjust the weight of the component by grinding the outer circle of the spacer sleeve (4) and the screw (5) to ensure that the weight difference between the components is ≤0.1g. ② Install the spacer sleeve (4) between the intermediate shaft section (61) of the diaphragm and the mounting flange of the diaphragm coupling (6), and make the two ends of the spacer sleeve (4) communicate with the through hole (64) and the threaded hole (65) respectively. The screw (5) passes through the through hole (64), the spacer sleeve (4) and the threaded hole (65) in sequence, so that the diaphragm coupling (6) forms a rigid whole; S4. Axial dimension measurement of diaphragm coupling (6): After the spacer sleeve (4) is installed, the overall length S of the diaphragm coupling (6) is measured using a high-precision caliper. S5. Dynamic balance measurement of diaphragm coupling (6): With the spacer sleeve (4) installed, the overall dynamic balance of diaphragm coupling (6) is measured, and the diaphragm coupling (6) is adjusted to remove the imbalance. S6. Measure the thickness of the adjustment pad (2): Measure the thickness of the adjustment pad (2) at 8 evenly distributed points and take the minimum value as h0; S7. Reserved installation distance: When aligning the first equipment mounting flange (1) and the second equipment mounting flange (7) radially and end faces according to technical requirements, reserve and fix the installation distance L0 between the first equipment mounting flange (1) and the second equipment mounting flange (7) based on the actual axial measurement dimension S of the diaphragm coupling (6) and the thickness h0 of the adjusting shim (2). S8. Measure the actual installation distance: Measure the actual installation distance between the first equipment mounting flange (1) and the second equipment mounting flange (7), and take the average value as the actual installation distance L; S9, Thickness of grinding adjustment shim (2): Based on the actual installation distance L and the actual axial measurement dimension S of the coupling, the thickness h of grinding adjustment shim (2) is LS; S10. Overall installation: The first equipment mounting flange (1), diaphragm coupling (6) and the second equipment mounting flange (7) are sequentially fixed and connected by fixing bolts (3) to form an integral part. During the installation and operation of the integral part, the spacer sleeve (4) and screws (5) are removed.

2. The high-precision installation and alignment method for a diaphragm coupling according to claim 1, characterized in that: In step S1, the positional tolerance of the through hole (64) and the threaded hole (65) is less than 0.05 mm.

3. The high-precision installation and alignment method for a diaphragm coupling according to claim 1, characterized in that: In step S2, the axial dimension of the spacer sleeve (4) is controlled within the theoretical dimension d ± 0.05 mm.

4. The high-precision installation and alignment method for a diaphragm coupling according to claim 1, characterized in that: In step S4, the overall length S of the diaphragm coupling (6) is measured using a high-precision caliper. Specifically, eight measuring points are evenly distributed around the circumference of the diaphragm coupling (6) and recorded. The difference in the eight measured dimensions is ≤0.05mm, and the average value of the eight measured dimensions is calculated. If the difference in the eight measured dimensions is >0.05mm, the diaphragm coupling (6) is disassembled, and the parallelism accuracy of the intermediate shaft section (61) and the coupling mounting flange (63) is checked respectively. If necessary, the parts are ground.

5. The high-precision installation and alignment method for a diaphragm coupling according to claim 1, characterized in that: In step S7, L0 = S + h0 (0 - 0.5).

6. The high-precision installation and alignment method for a diaphragm coupling according to claim 1, characterized in that: In step S8, when measuring the actual installation distance between the first equipment mounting flange (1) and the second equipment mounting flange (7), eight measuring points are evenly distributed around the circumference of the diaphragm coupling (6).

7. The high-precision installation and alignment method for a diaphragm coupling according to claim 1, characterized in that: In step S9, after the adjustment pad (2) is ground, the actual thickness of the adjustment pad (2) is measured. Eight measurement points are evenly distributed around the circumference of the adjustment pad (2) and the measurements are recorded. The difference in the measurement dimensions at the eight points of the adjustment pad (2) is ≤0.03mm.

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