Selection of Diaphragm Coupling and Installation of Flexible Pin Gear Coupling

The chooser of the diaphragm coupling should choose the appropriate balance level of the diaphragm coupling, and the rigidity of the bearing, bearing seat, and base: For rotating parts, the mechanical transmission system has a flexible base or bracket. The imbalance is more sensitive.

Axial deviation of the diaphragm coupling: If the shaft extension or flexibility of a certain machine is long, it is more sensitive to the unbalanced state of the diaphragm coupling.The relationship between the bearing load caused by the weight of the diaphragm coupling and the total bearing load: if a machine uses a light-loaded bearing or the diaphragm coupling load is basically caused by the cantilever load of the diaphragm coupling, this Machinery is more sensitive to the unbalanced state of the coupling. Mechanical devices with cantilever rotors or cantilever loads are usually more sensitive to the unbalanced state of the coupling.

Diaphragm coupling is an elastic soft coupling, there are many elastic diaphragm connections in the middle, the main function is to protect the equipment; there is also a large moment brought by the moment of inertia.

The diaphragm coupling has four technical advantages:

1. All-metal structure, large torsion transmission capacity and good service life: The diaphragm coupling uses a metal diaphragm as an elastic element, which has a large load transmission capacity, and there are no non-metal parts in the whole product, no aging problem, and good service life Compared with non-metal elastic element couplings, diaphragm couplings are suitable for harsh environments.

2. The ability to compensate for misalignment is large, and it is convenient to install and align: the diaphragm coupling adopts a stainless steel diaphragm, which can withstand large deformations while transmitting torsion, thereby compensating for the misalignment of the two shafts.

3. The axial and angular stiffness is low, and the impact on the equipment is small: the diaphragm coupling uses a thin metal diaphragm as the elastic element, and the angular and axial stiffness is low, so the additional axial force and additional bending moment are small .Because the tooth surface of the gear coupling can slide relatively, people often think that the gear coupling can compensate for angular and axial misalignment without adding additional influence to the unit.

4. Dry coupling, without lubrication: The elastic diaphragm coupling relies on the metal diaphragm to transmit torque and absorb the deformation caused by misalignment. There is no relative movement between parts, no friction and wear, so no lubrication is required. In line with the development direction of oil-free process equipment.

Installation process of elastic pin gear coupling:

1. Elastic pin gear couplings are usually cut from metal round bars. Commonly used materials are aluminum alloy, stainless steel, and engineering plastics.The elastic pin gear coupling uses a parallel or spiral groove system to adapt to various deviations and transmit torque.Elastic pin gear couplings usually have good performance and price advantages. In many practical applications of stepping and servo systems, the integrated design enables the elastic pin gear coupling to achieve zero-clearance transmission. The advantages of torque and no maintenance.The elastic pin gear coupling mainly has the following two basic series: spiral groove type and parallel groove type.

2. The elastic pin gear coupling is a new type of good performance coupling developed by our country. It combines the advantages of the existing standard elastic pin gear coupling with different structures, such as the advantages of the plum blossom coupling: elastic The components are under pressure, the structure is simple, and the performance is high.Overcoming the shortcomings of the plum blossom coupling: when changing the elastic element, the half coupling, the double flange plum blossom coupling and the moment of inertia are moved, and the application range is limited.When transmitting the same torque, the radial dimension is much smaller than that of GB4323 elastic pin gear coupling, with light weight and small moment of inertia.

3. The elastic pin gear coupling has good compensation performance for axial, radial and angular axis deviation, good vibration reduction performance, simple structure, stable operation, no noise, no lubrication, simple maintenance, convenient assembly and disassembly, Good manufacturability, reasonable cost, can be derived into a variety of structural forms, good versatility, wide application range, easy to use and popularize, one of the outstanding advantages of this coupling is that it only needs to be suitable for axis alignment and installation is difficult. Minimize the working environment of auxiliary working hours.

The elastic pin gear coupling adopts austenitic stainless steel diaphragm, which can withstand large deformations while transmitting torsion, thereby compensating for the misalignment of the two shafts.The non-metal elastic pin gear coupling is restricted by the low strength and easy aging of the non-metal elastic element, which not only has a short life, but also has a small compensation ability.The gear coupling is restricted by the relative slip speed of the tooth surface and the lubrication conditions. According to the information, the relative slip speed of the tooth surface should not be greater than 0.12m/s. The angular compensation ability is small.Therefore, the installation and alignment requirements for non-metal elastic pin gear couplings and gear couplings are relatively good.Once the misalignment exceeds the allowable range, it will cause the coupling to fail.

The elastic pin gear coupling relies on the locking force of the pin group to generate the frictional moment on the contact surface, and compress the rubber elastic sleeve to transmit the torque.It is suitable for small and medium power shafting transmissions with good rigidity of the installation base, good centering accuracy, low impact load and low vibration reduction requirements.The elastic work is compressed and deformed. Because the thickness of the elastic sleeve is thin, the volume is small, and the elastic deformation is limited, the elastic pin gear coupling can compensate the axis displacement and elasticity, but the allowable compensation amount for the axis displacement is less. The elasticity is weak.The elastic pin gear coupling is simple in structure, easy to manufacture, does not require lubrication, does not need to be bonded with metal vulcanization, is convenient to change the elastic sleeve, does not need to move the half coupling, and has the ability to compensate the relative deviation of the two shafts and damping .