How to choose the pump coupling?
Gear pump is generally selected by coupling of flexible coupling, the purpose is to transfer power and compensate the relative displacement of pump shaft and motor shaft, to reduce the precision of the requirements for coupling installation, mitigate impact and change the natural frequency of vibration of shaft system and avoid harmful vibration, etc. The following three kinds of commonly used coupling, coupling in KCB type gear pump produced a huge role in the course of using, so choose suitable coupling of KCB type gear pump plays an active role in the use of:

A, claw type elastic coupling
Claw type elastic coupling is also called the elastic coupling, is characterized by small volume, light weight, simple structure, convenient installation, low prices, often used in small power and not important occasions.


Second, the elastic dowel pin shaft coupling
Elastic dowel pin shaft coupling with dowel pin connected to two half coupling flange, one end of the dowel pin in the cone surface and the nut with the taper pin hole on the half coupling flange forming fixed coordinate, the other end of the elastic sleeve, in the other half of the coupling flange in the cylindrical pin hole. Non-metallic elastic element coupling column elastic sleeve pin coupling is its simple structure, no lubrication, easy installation, easy replacement, and do not require very high on the accuracy, often used in smaller pumps power.


Third, diaphragm coupling
China's current production of metal laminated flexible coupling, also known as the diaphragm coupling, using a set of thickness of thin metal spring leaf made into various shapes, with bolt, respectively, and the main, driven shaft on the connections of two and a half. Is characterized by simple structure, no lubrication, high temperature resistance, convenient installation and easy replacement, high reliability, big transmission torque.
Clean the oil hydraulic system and hydraulic oil and filter change regularly, cleaning tank.The hydraulic oil lubricating oil pollution is the main reason of the gear pump side panel.Add the hydraulic oil, lubricating oil must be filtered, and then you can join the fuel tank, replace the hydraulic oil should be used according to the machine or inspection work instruction to replace oil.Must correct selection of the hydraulic oil viscosity, viscosity is too large, will cause the hydraulic pump has no oil or grease lubricated bearing and end plate;Viscosity is too small, will be an increased leakage within the hydraulic pump, insufficient lubrication.Improper viscosity use may lead to efficiency and shorten the life of hydraulic pump.Install the gear pump and assembly should pay attention to the pump shaft and the shaft and shaft, the general requirements of the error and the drive shaft, there can be no axial channeling move;Installation should be easy to load the drive shaft, the gear can't knock force loaded on the gear pump, otherwise it will cause internal gear pump floating a change in the relative position between side shell and cause severe friction and heat, burn plate and bearings, broken shell, the pump scrap in advance.Long downtime pump idle, at least, should be adopted to make full use of the first.Oil pump seal should be maintained between oil suction mouth cans.Under the suction, exhaust pipes must be inserted into the liquid level tank to prevent the pollution of hydraulic pump oil absorption.Hydraulic pump suction is not sealed, will be a lot of air inhaled, coupled with poor working conditions, hydraulic oil oxidation, cavitation caused by high and low pressure transition zone, caused by meshing clearance, formed in the low pressure chamber slow noise, gear pump delivery pressure couldn't get on at the same time.