The error of the axial disassembly of the diaphragm coupling?

Diaphragm coupling is a common accessory in couplings, which has an important effect on the connection of equipment. Then, what is the error of the axial disassembly of the diaphragm coupling? The following is a small editor. Regarding its content, I hope that we will have a harvest!

Standard service of diaphragm coupling

The planning of the diaphragm coupling must consider the axial displacement between the two to be connected, and its value should be greater than 6mm.When the diaphragm coupling device is installed, the necessary compensation amount should be reserved in the direction of thermal expansion.The structural response of the toothed diaphragm coupling without spacer should be that the tooth sleeve can make an appropriate amount of axial movement, so that the front and back teeth can be separated from the closed position, so that the working condition of the gear teeth and the equipment need not be disassembled during maintenance. Coupling.The structure of the diaphragm coupling should ensure that all parts are accurately aligned.The mating inner and outer teeth should be centered by the tooth top.In order to reduce potential imbalances, tooth circumferential backlash.

①当膜片联轴器内径公役带与轴公役带构成合作时，在一般基孔制属过渡合作的公役代号将变为过盈合作，如k5、k6、m5、m6、n6等，但过盈量不大;当轴承内径公役代与h5、h6、g5、g6等构成合作时，不在是空隙而成为过盈合作。

②Diaphragm coupling outer diameter service belt is a special service belt because the service value is different from the general reference shaft. In most cases, the outer ring device is fixed in the housing hole. Some diaphragm couplings The component structure requirements need to be adjusted, and the cooperation should not be too tight, and often cooperate with H6, H7, J6, J7, Js6, Js7, etc.

For the straight joint surface of the diaphragm coupling part, the circular runout of the end face to the center of rotation is level 6, and the other end face circular runout is level 7; the cooperation surface and the guide face the radial circular runout of the center of rotation. The service level is level 6; the radial circle runout of other cylindrical surfaces is level 7; the coaxiality level of the cooperating surface and the guide facing the center of rotation is level 5.The diaphragm coupling seller shall state the required bolt tightening torque value. The straight flange of the hub and the spacer shall use bolts for reaming holes and self-locking nuts, and the hole size of the service belt shall be H8.The bolts should be constrained within a certain mass range to prevent adverse effects on the balance of the diaphragm coupling during exchange.When the buyer requires electrical insulation for the diaphragm coupling, the diaphragm coupling with spacer should be selected, and there should be electrical insulation on the flange joint surface and the bolt position.

Under normal circumstances, the axis is generally marked as 0～+0.005. If it is not frequently dismantled, then the interference cooperation of +0.005～+0.01 is sufficient. If frequent disassembly and assembly are required, it is just a transitional cooperation.We also need to consider the thermal expansion of the shaft material itself during rolling, so the larger the bearing, the gap between -0.005 to 0, and the gap between 0.01 and XNUMX.The other is the interference of the moving coil and the gap of the static coil.

Fit tolerance (fit tolerance) refers to the sum of the holes and shafts that make up the cooperation.It is the amount of variation that allows for gap or interference.The size of the service belt of the hole and the axis and the direction of the service belt constitute the cooperative service.The size of the diaphragm coupling hole and the shaft cooperation indicates the cooperation accuracy of the hole and the shaft.The size and orientation of the hole and shaft cooperation belt indicate the cooperation accuracy and nature of the hole and shaft.

Errors in the axial disassembly of the diaphragm coupling

The core components of the diaphragm coupling can be divided into beam waist type, ring type, combined link type, spokes and multiple methods according to the shape of the diaphragm.According to the working conditions of the diaphragm coupling, we can summarize the forces of the diaphragm coupling into the following four types, and give solutions for different types of forces, taking the eight-hole waist diaphragm as a study Elephant.

(1) The tortuous stress caused by the angular disassembly error.It can be solved according to the simplification of the figure below.Because of the theoretical error of the disassembly in the axial angle, the diaphragm undergoes periodic tortuous deformation along the axial direction, not to mention it is the main reason for determining the time when the diaphragm of the diaphragm coupling is tired.The displacement of the local bolt hole in the axial direction, radial displacement and axial displacement caused by the principle of angular direction.The scale of the rehabilitation moment H can be obtained through the viewpoint skew. Under normal circumstances, the angular displacement of the diaphragm of the diaphragm coupling is small, so the deformation of the diaphragm is classified as a small deformation, which can be analyzed by the theory of small deflection and bending of the thin plate.

(2) Because of the error of axial disassembly, the diaphragm is deformed along the axial direction.The displacement is loaded on the axial direction of the local bolt hole, and the radial displacement and the axial displacement are active.Confinement is applied to the two inner centers of the two ends, and local holes are used to receive the load.In this way, treat it as a statically determinate simply supported organization.

(3) Centrifugal stress due to inertia during high-speed spinning.Assuming bolts and

Diaphragm coupling diaphragm

If the data is the same, the respective masses can be obtained by the plan, and the centrifugal force can be calculated according to the azimuth and the spiral viewpoint, and the effect is on the total center of mass.The centrifugal inertial force of high-speed equipment is extremely important in the customized stress scheme. The centrifugal inertial force can be loaded according to the radial force F=(2n/60)2rp, and the orientation is radially outward, and the radial displacement of the local bolt hole is activated. , Circumferential displacement and axial displacement, there is no other load effect around.

(4) Thin film stress produced by torque production.Suppose the transmitted torque is T(Nm), and the total number of pieces is m. For 8-hole bolts, it is known from simplified conditions: the torque of a single diaphragm is T1=T/m, and the force on each main bolt is F=T/4mR.

The content of the diaphragm coupling is introduced above, and we have also introduced a lot of related coupling information. Friends who want to know more can pay attention to our website for more relevant information.