German LORENZ coupling LORENZ model LORENZ price

LORENZ coupling is a widely used coupling, also known as a jaw coupling, consisting of two metal jaw hubs and an elastomer. The two metal jaw hubs are generally made of 45 steel, but aluminum alloy is also used when load sensitivity is required.

LORENZ coupling features

Diaphragm couplings can compensate for axial, radial, and angular misalignments between the driving and driven machines caused by manufacturing errors, installation errors, load deformation, and temperature rise changes. Diaphragm couplings belong to metal elastic element flexible couplings, which rely on metal coupling diaphragms to connect the driving and driven machines to transmit torque. They have the advantages of elastic vibration damping, no noise, and no need for lubrication, making them ideal products for replacing gear couplings and general couplings today. Main characteristics of diaphragm couplings: 1) Strong ability to compensate for misalignment of the two axes; compared with gear couplings, the angular displacement can be twice as large, the reaction force is small during radial displacement, flexibility is high, and certain axial, radial, and angular displacements are allowed. 2) Has significant vibration damping effect, no noise, and no wear. 3) Adapts to high temperatures (-80+300) and harsh environments, and can operate safely under impact and vibration conditions. 4) High transmission efficiency, up to 99.86%. Particularly suitable for medium and high-speed high-power transmission. 5) Simple structure, light weight, small size, and convenient assembly and disassembly. Can be assembled and disassembled without moving the machine (referring to the type with an intermediate shaft), and does not require lubrication. 6) Can accurately transmit rotational speed without slip, suitable for precision machinery transmission.

LORENZ coupling selection

Correct selection of diaphragm couplings: 1) A diaphragm coupling consists of at least one diaphragm and two hubs. The diaphragm is fastened to the hubs with pins and generally does not loosen or cause backlash between the diaphragm and the hubs. Some manufacturers offer two diaphragms, while others offer three diaphragms, with one or two rigid elements in the middle connected to the hubs on both sides. 2) This characteristic of diaphragm couplings is somewhat similar to bellows couplings; in fact, the way couplings transmit torque is similar. The diaphragm itself is very thin, so it bends easily when relative displacement loads occur, thus allowing it to withstand deviations of up to 1.5 degrees, while generating lower bearing loads in servo systems. 3) Diaphragm couplings are commonly used in servo systems; the diaphragm has good torsional rigidity, but slightly inferior to bellows couplings. 4) 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 the deviation is within the acceptable range for normal operation of the coupling. 5) Adjust the model according to the shaft diameter: The initially selected bearing coupling connection dimensions, namely the shaft hole diameter d and shaft hole length L, should meet the requirements of the driving and driven end shaft diameters; otherwise, the coupling specification must be adjusted according to the shaft diameter d. It is common for the driving and driven end shaft diameters to be different. When the torque and speed are the same but the shaft diameters differ, select the coupling model based on the larger shaft diameter. In newly designed transmission systems, select from the seven types of shaft holes specified in GBT3852; the J1 type shaft hole is recommended to improve universality and interchangeability. Shaft hole length shall comply with the i bearing coupling product standard.

LORENZ coupling precautions for use

1) Products with diaphragms have sharp edges and may cause injury; it is recommended to wear thick gloves during installation. 2) Please install protective covers or other devices around the coupling to ensure safety. 3) If the shaft misalignment exceeds the allowable value during installation, the coupling may deform, leading to damage or reduced service life. 4) The allowable shaft misalignment of the coupling includes radial, angular, and axial deviations. During installation, please adjust to ensure that the shaft misalignment is within the allowable values specified in the corresponding product catalog. 5) When multiple types of misalignment occur simultaneously, the corresponding allowable values should be halved. 6) To extend the service life of the coupling, it is recommended to set the shaft misalignment to within 1/3 of the allowable value. 7) Tighten the screws after inserting the installation shaft; otherwise, the coupling will deform. When tightening screws, please use a torque wrench and do not use screws other than those provided as accessories. 8) If abnormal noises occur during operation, stop immediately and check the installation accuracy, screw loosening, etc. It is recommended to apply adhesive to the outer surface of the screws after installation and debugging to enhance protection.

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