The overall advantage and balance of the rotor in the diaphragm coupling

　　Many people have heard of couplings, but do not know what it is. According to understanding, couplings are also divided into many types. So, what are the overall advantages of diaphragm couplings and balance? The following is a small version The content of the coupling, I hope you can have a harvest!

　　The overall advantages and balance of the diaphragm coupling

　　The diaphragm coupling expresses the relative displacement of the two shafts through the elastic deformation of the diaphragm.It is a high-performance flexible coupling with metal elastic elements that does not require lubrication, has a compact structure, high strength, long service life, and no rotation gap.It is not affected by temperature and oil pollution, and has the characteristics of acid resistance, alkali resistance, and corrosion resistance.Suitable for high temperature, high speed, corrosive medium drive shaft.It is widely used in shaft transmission of various mechanical devices.

　　The design of the diaphragm coupling should make it work continuously in the unit for more than 3 years.The coupling should be connected to the shaft, and the coupling should be able to withstand 175% of the continuous torque during operation.When the torque specified by the buyer is 175%, the coupling is not damaged, but the connection fails; when the displacement of the two shafts connected by the coupling reaches 125% of the rated shaft, the coupling can continue to operate normally.

　　Couplings with gaskets should have enough gaskets to remove the coupling without moving the shaft.The coupling hub and shaft should have an interference fit.With the consent of the seller, the buyer can propose the amount of interference.Compared with the gear coupling, the diaphragm coupling has no relative sliding, no lubrication, no seal, no noise, no maintenance, and convenient manufacturing.It can partially replace gear couplings.

　　Diaphragm couplings are widely used in water pumps (especially high-power chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopter), high-speed Shaft transmission of various mechanical equipment.Power transmission systems for ships, steam turbines, piston-type power machinery and crawler cranes.The high-speed and high-power mechanical transmission system of belt vehicles and generators has been widely used in the high-speed transmission shaft system after dynamic balance.

　　Rotor distribution method:

　　XNUMX. Balanced terms

　　(1) The axis of rotation refers to a line around the object, which is determined by the journal, the mating surface or the positioning plane of the other surface.

　　(2) The offset of the axis of inertia relative to the axis of rotation may be parallel in special cases, and the coupling is unbalanced in most cases.Therefore, the two methods commonly used in the plane are often unequal.

　　3) Rigid rotor The rotor can be balanced and corrected in any two selected planes, operated at any speed, close to the fulcrum of the supporting device, and the unbalance will not significantly exceed the balance tolerance value, then the rotor is a rigid rotor.It should be noted that flexible couplings are usually composed of several parts, the center surface of which is intermittent and eccentric due to diameter errors.

　　XNUMX. Balance

　　Coupling balancing is a method of checking the mass distribution of the rotor.If necessary, the mass distribution should be adjusted to limit the vibration of the bearing journal or the force acting on the bearing.

　　Three, the type of imbalance

　　1) Single-sided unbalanced state. If the center of gravity of the object is not on the axis of rotation, a single-sided unbalanced state will appear.In this case, regardless of the relative position between the object and the axis, it will not be in a static equilibrium state.If the journal of an unbalanced object is placed on two parallel horizontal rods or tilted, the angular position and correction amount to be corrected on one side can be observed.The weight of an object is always transmitted under the shaft. The adjustment method is to add weight to the radius of the symmetry point between the weight side and the center of rotation, so that one side balance can be achieved on the static dynamic balancer without rotating the rotor.It is also commonly used to achieve single-sided balance.

　　2) When there is an imbalance and phase difference between the two planes, this imbalance will occur, and the phase difference may not necessarily be 180 degrees.The main inertia axis in the same position as the rotation axis is offset from the rotation axis.Usually, there is a skew between these two axes.When a rotating cylinder with an unbalanced moment (such as a coupling) is not restricted by the bearing, it rotates around the main axis of inertia, and the main shaft is aligned with its geometric axis.Moments of equal size and opposite directions are sometimes referred to as coupling unbalance.

　　Why use flexible diaphragm coupling

　　At present, the cost of high-performance gear couplings is generally higher than that of disc or diaphragm couplings.Gear couplings require many manufacturing processes and therefore consume a lot of manpower.In addition, the maintenance cost of gear couplings (regular lubrication, inspection and relubrication, etc.) is much higher than the maintenance cost of diaphragm couplings.Although original equipment manufacturers initially supported gear couplings that require lubrication, original equipment manufacturers have now begun to design and support diaphragm couplings to replace gear couplings.In today's turbomachinery, more than 95% of new applications use diaphragm-type flexible couplings.

　　The content of the diaphragm coupling is as described above.After reading it, everyone should have a certain understanding of it.Interested friends can also learn more about other coupling information we have collected.