German hydac coupling, hydac model, hydac price

hydac couplings contain an elastic compound with pre-compressed rubber, providing additional strength and extending service life. This coupling accommodates all types of misalignment. The hub material is high-strength aluminum alloy, which is lightweight and corrosion-resistant. The rubber component is primarily used for vibration damping, ensuring smooth and quiet power transmission, thereby protecting the driving force and driven machinery. Installation is simple; since the rubber part is a split insert, it can be installed by insertion after shaft alignment. Elastic couplings use parallel or spiral slot systems to accommodate various misalignments and transmit torque precisely. Elastic couplings typically offer good performance and a price advantage; in many practical applications of stepper and servo systems, elastic couplings are the preferred product. The one-piece design enables elastic couplings to achieve zero-backlash torque transmission and maintenance-free operation. Elastic couplings mainly consist of the following two basic series: spiral slot type and parallel slot type.

hydac Coupling Structure and Features

A diaphragm coupling consists of at least one diaphragm and two shaft hubs. The diaphragm is fastened to the hubs with pins, generally preventing loosening or backlash between the diaphragm and hubs. Some manufacturers offer two diaphragms, while others provide three diaphragms, with one or two rigid elements in the middle connected to the hubs on both sides. The difference between single-diaphragm and double-diaphragm couplings lies in their ability to handle various misalignments. Due to the need for complex bending of the diaphragm, single-diaphragm couplings are less suitable for eccentricity. Double-diaphragm couplings can bend in different directions simultaneously to compensate for eccentricity. Features: Diaphragm couplings have characteristics similar to bellows couplings; in fact, the torque transmission method is quite similar. The diaphragm itself is very thin, so it bends easily when relative displacement loads occur, allowing it to withstand misalignments up to 1.5 degrees while generating lower bearing loads in servo systems. Diaphragm couplings are commonly used in servo systems; the diaphragm has good torsional stiffness, though slightly inferior to bellows couplings. On the other hand, diaphragm couplings are very delicate and can be easily damaged if misused or incorrectly installed. Therefore, it is essential to ensure that misalignment remains within the normal operating range of the coupling. Selecting the appropriate coupling is a key step in using couplings effectively; the type of coupling must be considered during the design phase. Compared with gear couplings, diaphragm couplings have no relative sliding, require no lubrication or sealing, produce no noise, basically require no maintenance, are easy to manufacture, and can partially replace gear couplings.

hydac Coupling Abnormal Noise Troubleshooting

1) The gap between the two halves of the coupling is too wide, causing significant axial force on the diaphragm, leading to wear of the reamed holes or reamed bolts and resulting in abnormal noise; 2) Excessive axial offset or angular misalignment between the two halves of the coupling can also cause vibration and abnormal noise during equipment operation; 3) Differences in speed between the driving end and the driven end can also cause vibration and abnormal noise during equipment operation; 4) A fault in the motor's speed encoder causes fluctuating motor speed, leading to abnormal noise in the diaphragm coupling.

hydac Coupling Installation and Maintenance

Installation and Removal: 1) Wipe dust and dirt from the installation shaft surface clean, and apply a thin layer of machine oil or lubricant. 2) Clean the inner bore of the LingSi coupling and apply machine oil or lubricant. 3) Insert the LingSi coupling onto the installation shaft; if the bore fit is tight, avoid striking with an iron hammer or hard metal during installation. 4) After positioning, first tighten the screws gently in a diagonal pattern using a torque wrench (specified tightening torque 1/4). 5) Increase the force (to 1/2 of the specified tightening torque) and repeat the action in step 4. 6) Tighten and fix according to the specified tightening torque. 7) Finally, tighten the fixing screws sequentially in a circular direction. 8) During removal, ensure the device is completely stopped; loosen the locking screws sequentially. Maintenance Methods: 1) Before installation, clean the ends of both shafts and check the fit of keyways and other mating surfaces; 2) After installing the diaphragm coupling, operate normally for one shift and check all screws; if any are loose, tighten them. Repeat this several times to ensure they do not loosen; 3) To prevent fretting wear of the diaphragm during high-speed operation, which can lead to micro-cracks and damage at the diaphragm bolt holes, apply solid lubricants such as molybdenum disulfide between the diaphragms or apply a wear-reducing coating to the diaphragm surface; 4) Diaphragm couplings should avoid long-term overload use and operational accidents; 5) During operation, regularly check the diaphragm coupling for any abnormalities; if any occur, perform maintenance immediately; 6) Appropriate safety measures must be taken in all locations where personnel and equipment accidents could be caused by the operation of the diaphragm coupling.

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