Overall performance and alignment of diaphragm coupling

The key factors to improve the overall performance of the diaphragm coupling are the material selection of the two halves and the corresponding heat treatment follow-up, bolt hole clearance, diaphragm material and precision manufacturing and other comprehensive factors. Diaphragm coupling has satisfactory transmission performance, transmission equipment is widely used in all walks of life, for example, the power equipment of coal mill, wind turbines, etc., limit the diaphragm coupling comprehensive promotion of the key factors is the cost of using the diaphragm coupling problem, also is the problem of diaphragm coupling parts replacement, is the problem the service life of the diaphragm, The service life of the diaphragm is not only the material selection and precision manufacturing of the diaphragm itself (the density and strength of the diaphragm, the strengthening of the diaphragm material, the determination of the gap between the diaphragm and the diaphragm, etc.), but also the key problem of the fatigue strength of the diaphragm coupling itself, that is, the heat treatment of the diaphragm coupling. Diaphragm coupling should be in the correct selection of materials and follow up the corresponding heat treatment (normalizing, tempering, conditioning, etc.), so, the improvement of fatigue strength, to ensure that coupling for diaphragm coupling precision manufacturing fundamentally (material selection, heat treatment process, the strength of connecting bolt, joint bolt diameter and quantity, The gap between the connecting bolt and the two halves of the coupling and the gap between the diaphragm hole is determined. Our company specializes in the production of universal coupling

Alignment of diaphragm coupling is divided into four steps. Now let's talk about it more carefully.

1, the principle of diaphragm coupling alignment

The projection of the motor moving end end circle on the fixed end end is approximately regarded as a perfect circle, because the distance from the center of the moving end to the fixed end end is unchanged. To satisfy both, the axis of movable end and the axis of fixed end should be on the same line, which is only the ideal alignment state. During actual alignment, the allowable error is first set. When the error generated during alignment is within the allowable error range, the alignment ends. In many cases, the lower detection point of the pump cannot be tested, and alignment will not be possible.

2, three point table method to find the steps

(1) magnetic fixing seat, measuring rod and dial meter are fixed on the fixed end and movable end coupling respectively; (2) turn the axis to 1 point position, and clear the two thousand meter respectively; (3) Rotate the shaft to the 2 point position and read the data; (4) Rotate the shaft to the 3 point position and read the data; (5) (6) the motor front and hind feet are calculated separately, and bolt loosened, the motor front and hind feet pad, the thick pads, respectively, the mobile motor, try to make the two rely on tight coupling, the motor front and hind feet bolts tight again, in the two dial gauge, 1 point will be read at 2, 3 point data, and setting the permissible error value comparison, if did not meet the accuracy requirements, Repeat steps 2-6 above. (7) Step 6 After meeting the requirements, loosen the bolts of the front and rear feet of the motor slightly, keep the dial meter at 3 points, knock the front and rear feet of the movable end and the middle part of the movable end with a copper rod, and make horizontal alignment until and within the allowable error range; (8) After step 7 is met, tighten the bolts on the front and rear feet of the movable end to finish alignment.

3. Axial alignment of diaphragm coupling

Horizontal alignment does not need to calculate the front and rear feet of the movable end, clear the axial and radial dial meter at 1 point, read the axial and radial dial meter at 3 points, and knock the movable end with a copper rod to adjust the axis. First observe the axial dial meter reading, beat the movable end of the front and back feet with a copper rod, adjust the axial reading at 3 points to half of the original. Then observe the radial dial meter reading, with a copper rod to beat the movable end of the middle, the radial reading at 3 points is also adjusted to the original half. This requires repeated adjustments. The adjustment result should be within the allowable error range.

4. Radial alignment of diaphragm coupling

When the diaphragm coupling is aligning, the vertical direction should be adjusted first. The thickness of front and rear foot gaskets can be calculated by three-point detection data to detect the offset of the two axes. The distance between the outer edge of the movable end coupling and the outer edge of the coupling to the center of the axial dial meter rod hole; Distance from end face of movable end coupling to center of movable end forefoot bolt; Distance between center of movable end front and rear foot bolt. From the above data, we can know the thickness of front and rear foot gaskets. If the motor is higher than the fixed end, gasket should be reduced; If the motor is lower than the fixed end, gasket should be added.

After the vertical direction adjustment, the detection data of each point changed, so it should be reset at the position of 1 point, and the data of 2 and 3 points should be measured again. After adjustment, just check whether and is within the allowed error range.