How to choose the protective device after the plum blossom coupling is installed?

The plum blossom coupling is a widely used coupling, also called a claw coupling, which is composed of two metal claw discs and an elastic body.The two metal claws are generally made of No. 45 steel, but aluminum alloys are also useful when load sensitivity is required.It has good balance performance and is suitable for high-speed applications. Simple structure, no lubrication, convenient maintenance, easy inspection, maintenance-free, and continuous long-term operation.Polyurethane elastic elements are resistant to oil, have large carrying capacity, long service life and stability.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. It is suitable for medium and high speed occasions.Also called claw coupling, it is composed of two metal claw discs and an elastic body.The two metal claws are generally made of No. 45 steel, but aluminum alloy or stainless steel can also be used when load sensitivity is required.The coupling does not need to be lubricated, it can work under the conditions of dust and water, simple structure, convenient maintenance, but when replacing the elastic element, it is necessary to move one end of the coupling and the main shaft.Working temperature: -20～+70℃, the nominal torque of transmission is 6.3～8000N.m.

The coupling can compensate for the offset of the connecting piece due to the alignment, like a universal coupling, it can also transmit motion or torque when the two shafts have a large angle.The main function of the coupling and the clutch is to connect the shaft and the shaft (or other moving parts) to transmit motion and torque, and can also be used as a stabilizing device for overload protection.The difference is that the coupling generally cannot be disconnected during the operation of the machine, and can only be disconnected after the machine is stopped, and the clutch can be engaged or disconnected at any time during the operation of the machine.

XNUMX. Plum blossom coupling manufacturers introduce the difference between couplings or clutches

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

2. Commonly used clutches have two types: jaw type and friction type.The jaw clutch has a large transmission torque and can strictly determine the two shafts to rotate together. The size is compact, but the clutch is difficult.The friction clutch engages smoothly and conveniently, and plays a stable and protective role, but it is not certain that the speeds of the two shafts are the same.

3. Couplings and clutches are mainly used to connect two shafts into one body to transmit torque or movement.The clutch can be engaged and disengaged during operation, but the coupling cannot.

4. Couplings include sleeve coupling, flange coupling (rigid fixed); gear coupling (rigid movable): elastic ring pin coupling, nylon pin coupling (flexible Mobile).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.

5. The requirements for the use of couplings and clutches are that they should be able to adjust the offset between the two shafts, be able to absorb shock and vibration, and transmit a large torque.

XNUMX. How to choose the protective device after the plum blossom coupling is installed?

(1) The protective device of the plum blossom coupling is usually provided by the buyer.Therefore, this part of the content does not belong to the requirements of the coupling.The buyer or contractor shall specify the type of protective device required.In addition to purchase goods production.

(2) Each coupling should have a protective device to close the coupling and the shaft to prevent people or objects from entering the dangerous area when the unit is running.The protective device should be easy to disassemble, so that the connected machine will not be affected when the coupling is overhauled and maintained.

(3) The structure of the protective device is cylindrical and split along the axial direction, and the protective device is connected to the corresponding equipment in the unit by flanges at both ends.There should be an expansion joint at one end of the protective device, and an O-ring seal should be installed at the expansion joint.

(4) The structure of the protective device must have sufficient rigidity. When bearing a static load of 900N, its deflection shall not exceed 0.0005 times the unsupported length of the protective device.The protective device of the coupling that needs lubrication should be sealed.

(5) Protective device for continuous lubrication of the controller.Each fuel injection nozzle must be screwed to the protective device in the appropriate direction, so that the oil sprays in the direction of rotation.If the unit is running in forward and reverse directions, the oil will be injected along the axial direction.The oil nipple or oil pipe is not allowed to rub against the coupling to determine the stability in use.

(6) When necessary, the protective device should be equipped with anti-movement baffle to reduce the influence of gas or oil.Flange-connected cylindrical shell protection devices are usually used on medium and high-speed gear couplings and diaphragm couplings.

(7) If the coupling is working under corrosive conditions and needs protection, the protective device must be equipped with pipe joints to allow access to dry air or inert gas.