Ever-Power Co., Ltd.
Email: [email protected]
news
Correct installation bolt method of diaphragm coupling
The bolt is one of the important parts of the diaphragm coupling. Whether it is installed correctly or not directly affects the performance life and performance of the diaphragm coupling, otherwise it will cause waste of manpower and accessories.Therefore, the correct installation of the bolt direction is a key part, and you must remember not to install it backwards or drop any small parts including spring washers, so that the bolt assembly can exert its excellent performance and will not damage other parts of the coupling.
The correct method of installing bolts: insert the bolt from the outside of the small hole in the flange, and then pass it into the diaphragm hole (pay attention to the direction of the diaphragm. The diaphragm is composed of many single sheets, rivets and rivet washers. The sleeves are in contact, otherwise it will affect the service life of the rivet set), and then insert the buffer sleeve, elastic washer, and tighten the nut from the outside of the large hole of the flange to ensure that the bolt does not rotate, because the bolt and The surface of the flange mating section is a very important mating section for torque transmission, and the surface integrity directly affects the performance.
Based on the theory of elasticity and finite element method, a finite element analysis of the strength of the diaphragm, one of the key components of the diaphragm coupling, is carried out.Considering the torque, centrifugal force, axial displacement, radial displacement and angular displacement of the diaphragm, the finite element model of the diaphragm is established, the strength check and buckling calculation are carried out, and the calculation results are analyzed and discussed, and the differences are obtained. Under working conditions, the axial, radial and angular offset and strength buckling of the coupling meet the design requirements.According to the theory of fracture mechanics and fatigue cumulative damage, considering the influence of average stress on fatigue life, the load spectrum is compiled according to the actual load of the diaphragm, and the fatigue life analysis is carried out according to its normal operation and service life.According to different structural optimization methods, the density method is used to optimize the topology of the diaphragm according to the structural characteristics of the diaphragm.Establish a finite element model for topology optimization, perform static strength analysis, and then topology optimization of the diaphragm, and then check the static strength, buckling, modal, and fatigue of the optimized diaphragm, and obtain a good membrane片结构。 Sheet structure.
The bolt direction of the diaphragm coupling is installed incorrectly, which causes the diaphragm to be twisted and deformed: The gap between the bolt fitting section and the flange hole fitting section is generally based on the bolt diameter of 0.20mm～0.30mm. This fitting section plays a very critical role in transmitting torque. Replace if the gap exceeds the standard.The diameter gap between the inner hole of the buffer sleeve and the diaphragm rivet and the bolt is 0.5mm～0.7mm, which plays the role of pressing and positioning the diaphragm.If the bolts are installed in the direction, it is easy to cause the bolts to deviate, and the diaphragm will be twisted and deformed.Therefore, pay attention to the direction of the bolt when installing the bolt. Do not install the bolt direction randomly, otherwise it will cause the diaphragm to twist, and long-term operation will damage the surface of the diaphragm and the bolt mating section, and the small hole of the half shaft.
The ability to compensate the misalignment of the two axes is strong. Compared with the gear coupling, the angular displacement can be doubled, the reaction force is small during radial displacement, and the flexibility is large.
It has obvious shock absorption, no noise, no wear and long life.
It is suitable for working in high temperature (-80+300) and harsh environment, moving under shock and vibration.
The transmission speed is high.Especially suitable for medium, high speed and high power transmission.
Simple structure, light weight, small size, convenient assembly and disassembly.It can be assembled and disassembled without moving the machine, and no lubrication is required.
It can accurately transmit the rotation speed, without slip, and the rotation speed is fast.
The correct method of installing bolts: insert the bolt from the outside of the small hole in the flange, and then pass it into the diaphragm hole (pay attention to the direction of the diaphragm. The diaphragm is composed of many single sheets, rivets and rivet washers. The sleeves are in contact, otherwise it will affect the service life of the rivet set), and then insert the buffer sleeve, elastic washer, and tighten the nut from the outside of the large hole of the flange to ensure that the bolt does not rotate, because the bolt and The surface of the flange mating section is a very important mating section for torque transmission, and the surface integrity directly affects the performance.
Based on the theory of elasticity and finite element method, a finite element analysis of the strength of the diaphragm, one of the key components of the diaphragm coupling, is carried out.Considering the torque, centrifugal force, axial displacement, radial displacement and angular displacement of the diaphragm, the finite element model of the diaphragm is established, the strength check and buckling calculation are carried out, and the calculation results are analyzed and discussed, and the differences are obtained. Under working conditions, the axial, radial and angular offset and strength buckling of the coupling meet the design requirements.According to the theory of fracture mechanics and fatigue cumulative damage, considering the influence of average stress on fatigue life, the load spectrum is compiled according to the actual load of the diaphragm, and the fatigue life analysis is carried out according to its normal operation and service life.According to different structural optimization methods, the density method is used to optimize the topology of the diaphragm according to the structural characteristics of the diaphragm.Establish a finite element model for topology optimization, perform static strength analysis, and then topology optimization of the diaphragm, and then check the static strength, buckling, modal, and fatigue of the optimized diaphragm, and obtain a good membrane片结构。 Sheet structure.
The bolt direction of the diaphragm coupling is installed incorrectly, which causes the diaphragm to be twisted and deformed: The gap between the bolt fitting section and the flange hole fitting section is generally based on the bolt diameter of 0.20mm～0.30mm. This fitting section plays a very critical role in transmitting torque. Replace if the gap exceeds the standard.The diameter gap between the inner hole of the buffer sleeve and the diaphragm rivet and the bolt is 0.5mm～0.7mm, which plays the role of pressing and positioning the diaphragm.If the bolts are installed in the direction, it is easy to cause the bolts to deviate, and the diaphragm will be twisted and deformed.Therefore, pay attention to the direction of the bolt when installing the bolt. Do not install the bolt direction randomly, otherwise it will cause the diaphragm to twist, and long-term operation will damage the surface of the diaphragm and the bolt mating section, and the small hole of the half shaft.
The ability to compensate the misalignment of the two axes is strong. Compared with the gear coupling, the angular displacement can be doubled, the reaction force is small during radial displacement, and the flexibility is large.
It has obvious shock absorption, no noise, no wear and long life.
It is suitable for working in high temperature (-80+300) and harsh environment, moving under shock and vibration.
The transmission speed is high.Especially suitable for medium, high speed and high power transmission.
Simple structure, light weight, small size, convenient assembly and disassembly.It can be assembled and disassembled without moving the machine, and no lubrication is required.
It can accurately transmit the rotation speed, without slip, and the rotation speed is fast.
Recommended
- What to check for damage to the coupling 2019-12-09