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    Coupling connection and drum gear coupling installation

    Release Date: 2021-06-12 Publisher: admin

    Couplings and clutches are devices used to connect two shafts so that they can rotate together and transmit torque.The main difference between them is: the two shafts connected by the coupling can be separated only when the machine stops running. The two shafts connected by the clutch can be separated at any time during the operation of the machine. To separate or join.

    In practical applications, diaphragm coupling is a transmission device that uses metal flexible components to transmit torque without lubrication. It is widely used in ships, aviation, petrochemical, machinery manufacturing and other areas.The flexible element is a diaphragm group composed of a number of thin metal diaphragms of 0.2mm~0.6mm.When working, the torque is input from the active flange, and the torque is transmitted to the metal diaphragm through the active torsion bolts arranged at intervals along the circumference, and then the diaphragm is transmitted to the driven flange through the driven bolts for output.It realizes the flexible transmission of the coupling through the elastic deformation of the alloy diaphragm group, and uses the flexibility of the diaphragm to absorb the relative displacement between the input and output shafts, thereby compensating for the residuals caused by various factors in the connecting parts of the transmission shaft system. .

    The main function of the diaphragm coupling is to connect the two shafts (sometimes also connect the shaft and other rotating parts), so that the two shafts can rotate together to transmit motion and torque, realize the connection and separation between the shaft and the shaft, so as to realize the power Delivery and interruption.The diaphragm coupling also has the ability to compensate for the deviation of the two shafts, so as to reduce the additional load caused by the relative deviation of the two shafts, change the transmission performance and extend the life of the machine.In order to reduce the vibration of the mechanical transmission system and reduce the shock peak load, the diaphragm coupling should also have the cushioning and shock absorption performance.However, due to fierce market competition, many manufacturers use counterfeit and inferior products as good products in order to make huge profits, causing consumers to suffer losses. Therefore, the choice of products is also very important.

    Couplings include sleeve coupling, flange coupling (rigid fixed); gear coupling (rigid movable type): elastic ring pin coupling, nylon pin coupling (elastic movable type) ).Rigid elements cannot absorb shock and vibration, while elastic elements can absorb shock and vibration; movable and fixed refer to the ability to compensate for offset.

    Commonly used clutches have two types: jaw type and friction type.The jaw clutch has a large transmission torque and can strictly rotate the two shafts together. The size is compact, but the clutch is difficult.The friction clutch engages smoothly and conveniently, and has a stable and protective effect, but the speed of the two shafts cannot be the same.

    When selecting, you should first determine the selected coupling or clutch type, and then select the model in the phase standard according to the calculated torque to be transmitted.

    The difference is that the coupling generally cannot be separated during the operation of the machine, and can only be disconnected after the machine is stopped; the clutch can be engaged or disconnected at any time during the operation of the machine.The coupling can compensate for the offset of the connecting part due to the alignment, like a universal coupling, it can also transmit motion or torque when the two shafts have a large angle.Sometimes it is difficult to make an accurate definition to distinguish; couplings and clutches are mainly used to connect two shafts into one body to transmit torque or motion.The clutch can be engaged and disengaged during operation, but the coupling cannot.

    Drum-shaped gear couplings are adaptive and self-tuning technologies that can compensate for load changes, especially distributed drum-shaped gear couplings with communication, networking functions and integrated PLC.On the other hand, simple or industrial drum gear couplings and mechatronics, miniaturized drum gear couplings.Drum gear coupling is a key equipment for energy saving.According to online media statistics, the current domestic motors with variable loads and energy saving potential are at least 1.8 million kilowatts, which provides a large market for the application of drum gear couplings.The application of drum gear couplings has expanded from common fans and pumps to food, beverages, logistics, buildings, etc., continuously expanding new energy-saving areas, and its functions are also improved and diversified. On the one hand, it is fully digital and functional. In addition, due to the advent of new high-voltage power electronic devices, high-voltage and medium-pressure drum gear couplings have also made considerable progress.

    When installing and using the drum gear coupling, the position tolerance and size between the two shafts should be adjusted strictly according to the requirements.When installing, pay attention to adjusting the size of the end face between the two shafts of the coupling and the contact requirements and assembly dimensions of the internal gear and the external gear.For drum-shaped gear couplings used at relatively good speeds, attention should be paid to the hardness requirements of the tooth surface, and the variety and quality requirements of the lubricating grease.The connection matching bolts between the two inner tooth sleeves should be hinged and locked. In use, always pay attention to whether there is any looseness. If there is, it should be replaced in time, and the reamed holes of the bolts should be re-reamed.When the outer gear sleeve is sleeved on the spindle head, strictly check the chamfer of the coupling hole and the rounded corner of the spindle and the matching part, to prevent i1= from causing the shaft hole and the shaft to jam locally, which fails to meet the requirements of the contact surface .Drum-shaped gear coupling pay attention to the quality of the tangential key (contact surface requirements), control the load when using it, and do not overload it.

    Drum-shaped gear couplings transmit torque by connecting two front and back teeth and a central tube in series. If the distance between the motor and the reducer is too long, it is good to use this type of coupling instead.Under normal circumstances, the appearance of broken teeth will not appear, and the continuous rolling mill operation request is satisfied.The drum-shaped drum-shaped gear coupling can meet the requirements of the rolling mill for roll shifting and is convenient for expansion and contraction.Application, cleaning, and other characteristics.Drum gear couplings with central tubes need to transmit high-power torque, and the transmission speed is not very high, and its axial compensation can reach 2mm or so. It should be a good choice for large-scale machinery and equipment to use such couplings.

    If drum gear couplings and diaphragm elastic couplings work, good lubrication can slow down wear.Drum gear couplings are mostly lubricated by lubricating oil. The lubricating oil needs to be filtered by an oil filter. The filter degree is less than 10 microns. The tooth surface requires continuous lubrication, otherwise the temperature of the tooth surface will rise and water and dirt will accumulate. Drum-shaped gear couplings sometimes use the structure of the oil collecting groove, that is, the oil collecting groove is machined in the outer gear shaft hole, and the oil hole communicating with the oil collecting groove is drilled at the bottom of the outer gear groove. In order to make it sufficiently lubricated, we drum The centrifugal force generated by the operation of the gear coupling sprays the oil into the meshing part of the inner and outer gears.