What is the life cycle and compensation performance of the diaphragm coupling?

Couplings are often used in our days. It is a common connection accessory. So, what is the service cycle and compensation function of the diaphragm coupling? The following is the content brought by the editor about it. , I hope we can have a harvest!

Operating cycle and compensation function of diaphragm coupling

Compared with the gear coupling, the diaphragm coupling has no relative sliding, does not need to be smooth, sealed, noiseless, does not need to be repaired at all, and is more convenient to manufacture, and can partially replace the gear coupling.Diaphragm couplings have been widely used in the Shanghai industry. In practice, the central shaft type is generally selected to improve the two-axis offset compensation function.

The diaphragm coupling is composed of several groups of diaphragms (stainless steel thin plate) interwoven with two halves of the coupling with bolts. Each group of diaphragms is made up of several pieces. The diaphragms are divided into connecting rod type and different shapes. The whole piece.

During the useful service cycle of the diaphragm coupling, the wedge-shaped gaps that are skewed to each other need to be maintained, and lubricating oil is added, and the large port enters the small port and exits.The two surfaces must have a satisfactory relative motion speed, the fluid must have a satisfactory viscosity, and the oil supply must be sufficient.In the maintenance process, the most important thing is to grasp the fundamental area of ​​fluid dynamic pressure smoothness, which is also the theoretical basis of sliding bearing planning.

The diaphragm coupling can automatically compensate for the axial, radial and angular offset caused by the motor, as well as the influence caused by factors such as manufacturing errors, device errors, bearing deformation, and temperature rise.The diaphragm coupling belongs to the metal elastic element in the flexible coupling. The driven machine transmits torque, elastic oscillation, no noise, and no smoothness. It is now an ideal product to replace gear couplings and general couplings.

The diaphragm coupling bolt connection does not need to be threaded on the connecting piece, and the application is not restricted by the connecting piece, the structure is simple, and the disassembly and assembly are convenient.Stud bolts can be used in occasions where bolts cannot be used due to structural constraints, but a compact connection structure is required.The bolt connection does not have a nut and has a smooth and exposed appearance, but it is not suitable for frequent disassembly and connection to avoid damage to the threaded hole.

The core components of the diaphragm coupling can be divided into beam waist type, ring type, combined link type, spokes and multiple methods according to the shape of the diaphragm.According to the working conditions of the coupling, we can summarize the forces of the coupling into the following four types, and give solutions for different types of forces, taking the eight-hole waist diaphragm as a research on the image.

(1) The tortuous stress caused by the angular disassembly error.It can be solved according to the simplification of the figure below.Because of the theoretical error of disassembly in the axial angle, the diaphragm is periodically twisted and deformed along the axial position, not to mention it is the main reason for determining the time when the coupling diaphragm is tired.The displacement of the local bolt hole in the axial position, radial displacement and axial displacement caused by the principle of angular direction.The scale of the rehabilitation moment H can be obtained through the viewpoint skew. Under normal circumstances, the angular displacement of the coupling diaphragm is very small, so the deformation of the diaphragm is classified as a small deformation, which can be analyzed by the theory of small deflection and bending of the thin plate.

(2) Due to the error of axial disassembly, the diaphragm is deformed along the axis.The displacement is loaded on the axial position of the local bolt hole, and the radial displacement and the axial displacement are active.Confinement is applied to the two inner centers of the two ends, and local holes are used to receive the load.In this way, treat it as a statically determinate simply supported organization.

(3) Centrifugal stress due to inertia during high-speed spinning.

The development of domestic high-end diaphragm couplings is estimated to be a key point

The author's analysis of the high-end diaphragm coupling will be the main point of the development. It is estimated that domestic companies with advanced technology and high-end products will enjoy the effect of replacing imported high-end diaphragm couplings.

At present, domestic manufacturers that can produce CNC machine tool electric spindles in batches only need a few companies such as Axis Research Technology, and most of them need to import.The author's analysis of the high-end diaphragm coupling will be the main point of the development. It is estimated that domestic companies with advanced technology and high-end products will enjoy the effect of replacing imported high-end diaphragm couplings.The utilization ratio of CNC machine tool electric spindles in my country lacks 10%, which is far below the booming level.According to the plan, the sales of the diaphragm coupling industry will reach 2015 billion yuan by 55, and the CAGR in the next 5 years is 13.2%.The "Plan" will help accelerate the process of import substitution of high-end diaphragm couplings. Ultra-fine diaphragm couplings of P4 and above have high requirements for technical functions and reliability, and more than half of the domestic demand depends on imports.

Most of the high-end diaphragm coupling companies in my country are lagging behind in terms of development and production technology. Only a few companies with strong research and production technology can produce high-skilled diaphragm couplings. The lack of production capacity results in severe shortage of supply. This series of problems are the main reasons for the structural imbalance between supply and demand of high-end diaphragm couplings.

At present, only a few companies such as Axion Research Technology can produce this grade of products in batches, and there is huge room for substitution in the future shopping malls.

According to the editor’s understanding, the accuracy of the tumbling diaphragm coupling is generally divided into five levels: P0, P6, P5, P4 and P2. The accuracy of the diaphragm coupling used on the spindle of a fine machine tool should be P5 and above. For the spindle support of high-speed and high-precision machine tools such as CNC machine tools and machining centers, ultra-fine diaphragm couplings of P4 and above are required.

The content of the diaphragm coupling was introduced above. After reading it, we should have a certain understanding of it. Interested friends can also learn more about other couplings we have collected.