Open the pipeline centrifugal pump multistage centrifugal pump shell, for pumping clean water or similar physical and chemical properties in water and other liquids used. The temperature of the liquid is not higher than 80. Suitable for factories, mines, power plants, city water supply, agricultural irrigation and water conservancy.

Two, pipeline multistage centrifugal pump structure diagram:

This type of pump suction inlet and outlet are at the bottom of the axial line of the pump, horizontal direction and the axis into vertical position, the pump shell. Open, inspection without disassembly of the inlet, discharge pipelines and motor or other motives from coupling to the direction of the pump to see, pumps are inverse inch needle rotation direction. As a special order according to user needs can also be changed to "Shun needle rotation.

This type of pump the other important parts are: pump body, pump cover, impeller, shaft, double suction seal ring, bearing sleeve, etc.. In addition to axis data for high quality carbon steel, the rest is made of cast iron.

Pump body and the pump cover forms an impeller studio, in and out of the water in the flange on the system device and vacuum gauge and pressure gauge Guan Luokong, import and water flange of the lower part is provided with a water drain pipe holes.

Impeller via static balance calibration and fixed by the sleeve and the sides of the sleeve nut and its axial position can adjust through the sleeve nut, the axial force of the impeller using symmetry of the blade arrangement to reach equilibrium, there may be some residual axial force is coaxial bearing suffer.

Pump shaft is supported by two single row radial ball bearing bearings mounted in the bearing body on both ends of the pump body, grease, double suction seal ring is used to reduce the water pressure water leakage from water chamber back to the suction chamber.

The pump is directly driven by the motor through the coupling.

Shaft seal is soft packing seal, to cool the smooth seal chamber and avoid air leakage into the pump, in between the filler with seal ring, pump a small amount of high pressure water through a water seal pipe into packing cavity seal role.

Four, pipeline multistage centrifugal pump assembly, disassembly, installation

Assembly and disassembly

1, rotor assembly components: sequentially the impeller, bushings, sleeve nut, sets of packing, packing ring, packing gland, block hydrosphere, bearing component is arranged on the pump shaft, and a double suction seal ring, and then put on the coupling.

2, the rotor installed in the pump body, impeller adjusting axial halo to both sides of the double suction seal ring next to be fixed. The bearing body gland with the fastening screws.

3, put on the packing, put away the paper lining, an upper pump cover lid tighten the screw tail pin after, screw cap nut, grave material gland. But do not press the packing too tightly, the packing too tight will enable sleeve fever, the consumption of power is larger, while not too loose, too loose will enable the leakage of liquid, water pumps, reducing efficiency.

After the realization of the assembly, with the manual pump shaft, do not rub the scene, the rotation is relatively light and smooth uniform, the demolition can be carried out in accordance with the above assembly sequence.

Install

1, check the pump and the motor should be no damage.

2, the installation height of the pump, and the hydraulic loss of the suction line, and its speed can not exceed the allowable vacuum height of the sample. Basic dimensions shall be in accordance with the installation dimensions of the pump unit.

3, installation sequence:

1 pump on the embedded anchor bolts of concrete, with adjustment during the wedge block correction degree, fit and tighten the anchor bolts, to prevent the move.

After the foundation and concrete pump foot.

When the concrete is solidified, tighten the anchor bolts, and from the new inspection pump level.

The correction of the motor shaft and the pump shaft concentricity. The two axes line has always been, in two axes circle coaxial tolerances of difference is 0.1mm, the end gap along the circumference of the average degree allows poor 0.3mm (in connection with the import and water pipes and trial operation after the resolution check again, still should match the request).

The inspection is consistent with the motor steering pump, mounted on the coupling and connecting pin.

4, the import and export of water and water should be set up to support the other way, not by the pump body support.

5, water pump and piping between the junction, should ensure good air tightness, especially in the water pipe, must ensure that the strict no leakage, and in the installation should be no nest of air.

6, if the pump is installed in the water above the water level ", in order to fill the pump starting, individual foot valve can be mounted. Can also take the vacuum water diversion approach.

7, the water pump and the water pipe, the general need to install the gate valve and check valve (less than 20 m head can not be), check valve installed in the back of the gate valve. The installation method described above refers to the water pump unit with a public base.

Installation of a pump with a common base, with a wedge between the base of the base and the concrete foundation to adjust the level of the unit. And then pouring concrete in. The installation guidelines and requirements, and the same as the unit with a common base.

Five, pipeline multistage centrifugal pump start, stagnation and operation

1, starting and stopping:

Before starting, the rotor of the rolling pump should be light and smooth.

II to close the sluice valve, to pump injection (if no foot valve with vacuum pump vacuum water diversion) to ensure the pump full of water. No air nested deposit.

3 if a vacuum or pressure meter is arranged on the pump. To close the pump connected to the Rotary Foundation and then start the motor. Until the speed is normal after the open; and then gradually open the sluice valve, such as streaming set is too large, can properly off a small valve adjustment; conversely flow over an hour. The gate valve opening.

To tighten the packing gland's nuts, the liquid drops out. At the same time pay attention to packing