In the pump industry, rotor pumps mostly use flexible couplings. These couplings can be further divided into two types: those without elastic elements and those with elastic elements. Flexible couplings without elastic elements, such as universal joint couplings, are suitable for applications where there is a certain angle between two shafts and the rotational speed is not high. The single universal joint type has a relatively simple structure and is often used in light-duty auxiliary transmissions; although the double universal joint type has a more complex structure, it provides smoother transmission, allows for greater angular displacement, and is commonly found in medium and small vehicles or engineering machinery.  

(Bonve Pump Industry: Plum Coupling)  

Flexible couplings with elastic elements offer vibration damping and shock absorption capabilities, making them more suitable for working conditions with frequent vibrations or impact loads. For example, the plum coupling is widely used in transmission systems of small and medium-power pumps and compressors due to its compact structure, easy installation and disassembly, and excellent vibration damping performance. Its elastic plum block transmits torque while moderately compensating for deviations, offering cost-effective practicality.  

The diaphragm coupling, with its metal diaphragm as the core component, offers advantages such as high alignment accuracy, no need for lubrication, and easy maintenance. Although its buffering capacity is relatively limited, it is commonly used in high-speed precision transmission applications due to its adaptability to high speeds and smooth operation, such as in certain high-performance centrifugal pumps or aerospace auxiliary equipment.  

(Bonve Pump Industry: Diaphragm Coupling)  

In addition, the elastic sleeve pin coupling and the elastic pin coupling are also common types. The former has a simple structure and is easy to replace, making it suitable for small and medium-power applications with good alignment and frequent starts and stops. The latter, known for its strong wear resistance and wide adaptability, is often used in pump equipment with medium loads and certain displacement compensation requirements.  

Therefore, selecting the right coupling requires comprehensive consideration of factors such as power, speed, alignment accuracy, vibration environment, and maintenance costs. A rational choice not only enhances the operational reliability of pump units but also effectively extends the service life of the equipment.  

Bonve always adheres to the philosophy of "Wholeheartedly Making Good Rotor Pumps," committed to providing global customers with customized conveying and mixing solutions. If you have technical inquiries, selection needs, case references, or other cooperation intentions related to Bonve rotor pumps, please feel free to contact us.  

Service Hotline: 0574-87588986 13586591794  

Official Website: www.bvpumps.com  

Business Email: market@bonvepumps.com  

We look forward to working with you to drive efficiency and innovation in industrial fluid transmission with precision technology.