Maintenance and selection of elastic pin gear coupling

The following points should be paid attention to when the elastic pin gear coupling is overhauled:

XNUMX. The positioning taper hole of the elastic pin gear coupling plays a role in positioning the pin bolt, so the matching part of the taper hole should be carefully checked.Those found to be defective, worn, or deformed on the cone surface should be dealt with or replaced.When processing the stud bolts, they should be processed in accordance with the manufacturer's original drawings.If there is no manufacturer’s original drawings, please pay special attention to the accuracy of the taper size of the taper hole when surveying and mapping parts. Inconsistent taper will result in improper installation of studs or skewed positioning, causing equipment operation defects.

0.2. When processing the spare parts of the elastic ring, pay attention to the conformity of the material and the correct size. The inner hole of the elastic ring and the pin should have an interference of 0.4mm~0.5mm.After assembly, positioning and tightening, there should be a clearance of 1.0mm~XNUMXmm between the outer circle of the elastic ring and the pin hole.The size of the elastic ring should be the same, and the elastic rings of different sizes should not be mixed, especially the elastic ring on the same pin should be replaced with a new one. If the old one is used, the old one should be used uniformly. The degree of wear and damage of the elastic ring is not very vivid, avoiding the mixing of new and old.If the gap between the elastic ring and the pin hole does not meet the requirements after installation, the outer circle of the elastic ring can be trimmed with a fine file if there are no spare parts or other unavoidable circumstances to make it meet the gap requirements.

XNUMX. The stud bolts should be carefully inspected to check their straightness, surface finish, and surface roundness.Those who have defects such as bending deformation and uneven surface should be replaced.

Four, elastic pin gear coupling is strictly prohibited when disassembling the elastic pin to prevent pin deformation, thread damage, bending of the thread part, and roughening of the pin hole.When beating, a red copper rod should be placed on the nut to vibrate from the front, so that it will not damage the thread, and will not cause deformation due to excessive force.

XNUMX. The spacer ring plays the role of positioning the elastic ring and generating appropriate tightening force on the elastic ring. Therefore, its two ends should be smooth and free of protrusions, and the end surface should be smoothed with a file.There should be a gap between the inner hole and the pin, so that it can be easily inserted without jamming.The width dimension should meet the requirements of the drawings.If the width dimension is too large, it should be replaced.

XNUMX. Before disassembling the coupling, make an alignment mark on the coupling. When reinstalling, the two couplings are aligned with the mark to connect, so as to minimize the impact of the coupling on the dynamic balance of the shaft system before and after the coupling.Before disassembling the pin, the pin and pin hole should be numbered correspondingly, and reinstall it when reinstalling.The loose parts such as nuts, gaskets, spacer rings, elastic rings and so on should be combined and stored in sets to prevent the loose parts from being lost or disordered, and to prevent accidental dynamic imbalance after installation.

The inner and outer teeth of the elastic pin gear coupling are calculated according to the relative size of the tooth number modulus, so there will be no tooth punching during transmission.However, some customers have reported that the coupling will appear to be broken under normal operation conditions. Below, we will answer in detail for you:

XNUMX. The gear processing quality is poor.The tooth root part with high stress concentration is rough, not smooth transition, which exacerbates the stress concentration effect; the material processing is poor, the grain flow line cannot be distributed along the tooth profile, and good comprehensive mechanical properties cannot be obtained; the gear is cantilever loaded, and the tooth root is equivalent At the fulcrum of the cantilever beam, the root of the tooth bears a large bending stress, and cracks will occur at the root of the tooth.

Corresponding measures: strictly control the processing quality.When designing and manufacturing gears, attention should be paid to the importance of tooth root fillet, smooth transition, without additional stress concentration; improve processing and manufacturing accuracy, so that load distribution is uniform, and dynamic load factor is reduced; gear material is changed from 45# steel to 42crmo , During processing, the grain streamline should be distributed along the tooth profile to obtain good comprehensive and mechanical properties.

XNUMX. The overhaul plan is unreasonable.After the gears of the ball mill reducer, in order to resume production, which shaft and gear are generally replaced by which shaft is geared, the new and old gears are in good meshing condition without normal running-in.The impact phenomenon occurred during operation, which made the gears break easily.

Corresponding measures: optimization of the maintenance plan.Since the on-line gear has been partially worn or partially failed, the contact condition of the new gear is not good when meshing with it.In order for the gears to mesh normally, they should be arranged as a platform for sufficient running-in.Through running-in, the contact area of ​​the gear teeth can be increased, the surface finish and contact accuracy of the gear teeth can be improved, and the local stress can form a cold work hardened tooth surface layer, thereby improving the bearing capacity of the gear and prolonging the service life.

The elastic pin gear coupling utilizes the characteristics of its mechanism, so that the two shafts are not on the same axis and can realize the continuous rotation of the connected two shafts under the condition of the axis included angle, and transmit torque and movement simultaneously. ZLL type-elastic pin gear coupling with brake wheel features: its structure has greater angular compensation capability, compact structure and good transmission speed.The angle between the two axes of the ZLL-type elastic pin gear coupling with brake wheel of different structure types is different, generally between 5°-45°.

How to choose the elastic pin gear coupling correctly?

XNUMX. If you want to consider cost, easy installation and operation, you can choose a plum-shaped elastic coupling. The plum-shaped elastic coupling has a simple structure, easy operation, easy installation, low cost, and convenient maintenance.

XNUMX. Gear couplings can be used for high-power and heavy objects.Gear couplings have better bearing capacity, and have high elasticity and are not easily damaged.

Third, the requirements for the number of revolutions of the elastic pin gear coupling are more accurate, and the requirements for the balance force are also relatively high. You can choose the diaphragm coupling, which has a relatively high accuracy.