Installation and working principle of plum coupling

As a common item in factories nowadays, plum blossom couplings have a small number of parts, small radial dimensions, no lubrication, and high load-bearing capacity. A half coupling is required for axial movement. The coupling has a problem with the relative offset of the two shafts. Compensation force.

Let's briefly understand the working principle of plum coupling

1. Before installation, check whether the two shafts of the prime mover and the working machine are concentric, and whether there are wrapping paper and bruises on the surfaces of the two shafts.Check whether there are debris in the inner holes of the two half couplings of the plum coupling, and whether there are bruises on the edges of the inner holes. If so, clean the shaft and half couplings, and handle the bruises with a fine file.Then check whether the inner hole diameter and length of the two half couplings are consistent with the diameter and shaft elongation of the prime mover and working machine.In general selection, it is better to let the length of the prime mover and the working machine end half coupling be less than the shaft extension of 10-30mm.

2. In order to facilitate the installation, the two half couplings are placed in the 120150 insulation box or oil tank for preheating, so that the inner hole size increases and it is easy to install.

After installation, the shaft head should not protrude from the end face of the half coupling, it is better to be flush.Detect the distance between the two halves of the coupling: 34 points of readings measured along the two inner sides of the flange of the half coupling are averaged, and the sum of the measured dimensions of the extension and the two diaphragm sets is controlled by the error. Within the range of 0-04mm.

3 、找正：用百分表检测两半联轴节法兰盘端面和外圆跳动，当法兰盘外圆小于250mm时跳动值应不大于005mm;当法兰盘外圆大于250mm时，跳动值应不大于008。

4. Install the bolts: insert the bolts from the outside of the small hole of the flange, pass through the outside of the large hole of the other flange, put on the buffer sleeve, elastic washer, twist the nut, and tighten the nut with a wrench.If the installation is unsuitable or if it is removed and replaced without damaging the shaft and the half coupling, it is better to rotate freely after installation.

5. Instructions for the operator: Before starting the equipment, check whether the nut of the torx coupling is loose or falling off, and if necessary, tighten the nut with a wrench in time.The load pipeline valve should be opened after starting the equipment with no load for 1 minute; the shutdown sequence is reversed. (Please brush the outside of the coupling with oil once a month).

6. Practice has proved that if the installation, maintenance and operation are carried out according to the instructions and requirements, the number of daily starts of the plum blossom coupling is 15 times, and the service life of the coupling is more than 5 years. If the installation, maintenance, Operation, especially if the bolts are installed in the wrong direction to deform the coupling, or the prime mover and the working machine are offset too much, the coupling will be damaged in advance.