Shaanxi pump with elastic sleeve pin coupling

For pumpElastic sleeve pin couplingThe two halves of the coupling flange are equipped with elastic sleeve (rubber material) pins to realize the connection of the two halves of the coupling.Elastic sleeve pin couplings for pumps used to be widely used pump couplings.

The elastic sleeve pin coupling for pump is a pin made of several non-metal elastic materials, which is placed in the flange hole of the two halves of the coupling, and the two halves of the coupling are connected by the pin. The coupling structure It is simple and easy to manufacture, and it is convenient to assemble and disassemble the elastic element without moving the two couplings.

The material of the elastic element (column pin) is generally selected from nylon 6, which has the ability to slightly compensate for the deviation of the two axes. The elastic part is sheared when working, and the workability is extremely poor. It is only suitable for the medium-speed transmission shaft system with very low requirements, not applicable For working conditions that require high workability, such as the transmission shaft system of the lifting mechanism of hoisting machinery cannot be selected, it is not suitable for low-speed load-bearing, strong impact and large vibration transmission shaft system, for radial and angular deviations Larger working conditions and drive shafts with lower installation accuracy should not be used, as they are obsolete.The pin in the elastic pin coupling shaft is in shearing and squeezing state when working, and its strength condition is to calculate the shear strength of the cross section of the elastic pin and the squeezing strength of the pin and the pin hole wall.

Features of elastic sleeve pin coupling for pump:

①The pin of the elastic sleeve pin coupling is covered with a rubber ring, which has elasticity and the ability to compensate the axis displacement, but when the relative angular displacement is large, it is easy to wear;

②Simple structure, convenient installation, easy replacement, small size, light weight, large transmission torque, widely used in various rotary pumps;

③The allowable relative radial displacement is 0.14-0.2mm; the allowable relative angular displacement is 0 degrees 40 minutes;

④ The additional radial load caused by the relative displacement of the two shaft axes is (0.1-0.3)P;

⑤The standard of the water pump industry is Bll01, its larger allowable torque is 8316N·m, and its larger shaft diameter is 200mm.

Insufficiency of elastic sleeve pin coupling for pump:

◆Because the material of the elastic sleeve pin coupling for the pump is cast iron, its weight is 38.8 kg, so that the motor wastes a lot of electric energy during the water supply operation, which affects the efficiency of the unit and increases the operating cost.

◆Because the disassembly of the elastic sleeve pin coupling for the pump is very troublesome, it is easy to deform or damage the coupling for the cast iron pump when repairing the water pump and the motor.

◆The elastic sleeve pin coupling for pumps requires relatively high relative radial displacement of the two shafts, which is 0.2～0.6mm, which brings great difficulty to the alignment of the concentricity of the coupling.In addition, due to the loose bolts during operation, the vibration and noise of the water pump unit will increase.