How to improve the compensation performance of the diaphragm coupling and the advantages of the plum blossom coupling

Compared with the gear coupling, the diaphragm coupling has no relative sliding, does not need lubrication, sealing, noise, basically does not require maintenance, and is more convenient to manufacture. It can partially replace the gear coupling.Diaphragm couplings are very common in industrial applications. In practical applications, the intermediate shaft type is generally used to improve the performance of two-axis offset compensation.

Diaphragm coupling current collectors, because the old-fashioned current collectors are on the non-load end of the motor shaft, only rely on the single-end bearing of the motor to form a cantilever structure.When using a torque sensor, pay attention to the question of the equipment. Because the torque sensor belongs to the power equipment, it is the application of the dynamic torque sensor connected to the motor. The measurement of large torque force needs to be used cautiously. Load equipment and diaphragm couplings, membranes The connection between the chip coupling and the sensor and the connection between the coupling and the power equipment must not be ignored.

The unbalanced torque during starting and running of the motor is likely to cause radial vibration of the collector device, which may cause uneven brush wear and shorten the service life of the brush; in the worst case, the collector ring and the brush will ignite due to poor contact. , Ablate the surface of the collector ring, and even damage the collector's diaphragm coupling; in the normal condition of the sensor equipment, the selected coupling is a rigid connection, large sensation, small concentricity and 0.2mm greater than 0.05mm, it is recommended Use flexible connections.Rigid connection can be used outside this scale.Secondly, when the torque sensor is in use, its equipment should be placed between the power source and load of the two sets of couplings, and the power load and load equipment should be fixed to prevent sensation, otherwise it will cause the appearance to fail to work normally.

When standardizing the external application of torque, the coupling should accept the corresponding axial force and bending moment, and try to prevent the external force from being too large, which directly causes the external surface to be damaged and cannot be used.The diaphragm coupling is composed of several groups of diaphragms that are alternately connected with the 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 shape of the whole piece type.

The plum blossom coupling evolved on the basis of the straight claw type, but the difference is that its design can be adapted to the application of the servo system, and is often used to connect servo motors, stepping motors and ball screws.The curved surface is to reduce the deformation of the elastic plum spacer and limit the influence of centripetal force on it during operation.The zero-clearance claw coupling is composed of two metal sleeves (usually made of aluminum alloy, stainless steel can also be provided) and a plum blossom elastic spacer.The plum blossom elastic spacer has multiple leaf branches. Like a slider coupling, it also squeezes the plum blossom elastic spacer to match the sleeves on both sides, and thus determines its zero clearance performance.

Unlike the slider coupling, the plum blossom coupling is driven by squeezing, while the slider coupling is driven by shear.When using a zero-clearance claw coupling, the user should be careful not to exceed the greater bearing capacity of the elastic element given by the manufacturer (under the premise of determining the zero-clearance), otherwise the plum elastic spacer will be squashed Deformation loses elasticity, and preload disappears, resulting in loss of zero-clearance performance, and users may only find out after serious problems occur.The plum blossom coupling has good balance performance and is suitable for high-speed applications, but it cannot handle large deviations, which are axial deviations.

The plum blossom coupling has the advantages of simple structure, no lubrication, easy maintenance, easy inspection, maintenance-free, and continuous operation.The polyurethane elastic element is not afraid of oil, has a large load-carrying capacity and a good service life.Work stably, with good vibration damping, buffering and electrical insulation properties.It has large axial, radial and angular compensation capabilities.The structure is simple, the radial dimension is small, the weight is light, and the moment of inertia is small, which is suitable for medium occasions.