1、 IMO screw pump Check whether the connection between the suction pipe section and the instrument connector is sealed before starting.

2. First start order Screw pump If the pump has not been started for a long time or the medium in the pump has been unloaded after use, the suction chamber shall be filled with medium and used to roll the pump shaft for several revolutions before starting. Avoid starting the pump without medium or with only a small amount of medium, make the surface between the stator and rotor have a medium lubricating liquid film, avoid dry friction between the stator and rotor, and cause the stator to be damaged or the starting torque is too high, which will make the pump unable to start or reduce the suction performance of the pump. IMO agent

3. When transporting medium with high viscosity, heat the spacer layer of the screw pump before starting to reduce the viscosity of the residual medium in the pump for easy starting.

4. Check the steering of the prime mover to avoid reverse rotation.

5. Before starting, all valves on the inlet pipeline and outlet pipeline shall be opened, and the pipeline system must be unblocked.

The stator of screw pump shall be made of rubber elastic materials (including a few elastic plastics). At present, the stator materials of similar screw pumps are all rubber stator, and most of the same products are also such stator. It is necessary to select interference cooperation when cooperating with the rotor. This is because there is always a certain error in the processing of the rotor and stator, the meshing line cannot reach the theoretical thorough seal, and the pressure of the medium during operation will cause a certain elastic deformation of the rubber stator, forming a medium "breakdown" of the meshing line and causing leakage, When the pump is running, the inertia force of the eccentric rotor and the radial force of the medium constitute the stator of the force bearing part, which may cause the stator of the force bearing part between the rotor and the stator of the force bearing part in the opposite direction of the force to produce contraction deformation, and then may cause the gap between the rotor and the stator of the force bearing part in the opposite direction of the force. So. When assembling the pump, there should be a certain initial interference between the rotor and stator. The determination of this initial interference amount also needs to consider the two elements of thermal expansion during operation, which will make the practical interference amount of rotor and stator greater than the initial interference amount. Some enterprises in China generally account for about 1% of the rotor diameter. Under the working condition of high medium viscosity and low discharge pressure, the smaller interference shall be taken, and vice versa.

The stator is made of elastic material. In addition to processing technology, it is also an important reason that elastic material has good wear resistance when conveying granular and fibrous materials.