Performance range

Flow: Q up to 2200m3/h

Lift: H up to 3500m

Inlet pressure: PS up to 10MPa

Outlet pressure: PD up to 45MPa

Working temperature: t=-80 ℃ ~ 450 ℃

Speed: up to 5600rpm

Structural features

1. Shell

The shell is of cylindrical structure, supported in the center, and has guide and positioning seats at the bottom. When subjected to thermal shock and high temperature, the cylindrical structure can avoid the influence of deformation.

The inner shell is completely immersed in the medium and evenly heated with the rotor parts, so the pump is not in danger of deformation due to high temperature.

The pump body and pump cover are sealed with reliable metal winding gasket, so that the pump can still ensure no leakage under high temperature and high pressure.

Good safety performance. When transporting dangerous media, due to the outer cylinder structure, the sealing leakage path and leakage possibility are greatly reduced.

According to the pressure and use, the cylinder can be formed by casting or forging.

The suction and discharge ports of the pump are generally arranged vertically upward and cast into one with the cylinder. During the maintenance of mechanical seals, bearings and overhaul, it is not necessary to dismantle the cylinder, motor and inlet and outlet pipes, but only to dismantle or install the extraction unit.

2. Inner housing

The inner shell has two structural forms: segmented multistage pump and split multistage pump. The axial force of segmented multistage pump is balanced by the balance disc, and the residual axial force is balanced by pairs of angular contact bearings. The axial force of the split multi-stage pump is balanced by the back-to-back installation of the impeller.

3. Impeller

Each specification has two or more hydraulic models. Select the appropriate hydraulic model according to the requirements of working conditions. The first stage impeller of each specification pump is normally a single suction impeller, and the pump with a diameter of more than 100 can be equipped with a double suction impeller at a very low NPSHr value.

Each impeller is fixed on the shaft to reduce the influence of deformation caused by temperature change and processing accumulation.

4. Rotor

The rotor is a rigid rotor with sufficient shaft diameter. All parts installed on the shaft are dynamically balanced with the rotor to ensure reliable operation of the pump, stability and low vibration;

The pump shaft is made of high-quality alloy steel, and the tapered structure is adopted at the coupling, which is convenient for assembly and disassembly;

The dynamic balance mode of the rotor meets the requirements of the 11th edition of API610;

5. Bearing type, lubrication and cooling

The following three types of bearings are used: radial rolling bearings and thrust bearings, or radial hydrodynamic and rolling thrust bearings, and hydrodynamic radial and thrust bearings. Their basic rated life is at least 25000 hours of continuous operation under rated conditions;

There are two ways to lubricate bearings: 1. Design of oil slinger for large oil pool with thin oil lubrication; 2. In case of heavy load, forced lubrication by external service station shall be adopted.

Thin oil lubricated bearings are cast with radiators outside and equipped with fans for combined cooling to ensure that the bearing temperature rise does not exceed the standard requirements; The constant position oil cup set on the bearing body can automatically supplement the loss of lubricating oil in time.

Forced lubrication thin oil station – our company can supply products that meet the requirements of api614 standard. For bearing temperature rise, platinum thermistor is used for temperature measurement, and bearing temperature is detected online.