Performance range

Flow: q=25 ～ 2500m ³/ H

Lift: h=60 ～ 2750m

Speed: n ≤ 5200rpm

Temperature of conveying medium: t=-40 ℃ ~ +200 ℃

Transmission medium: it is applicable to crude oil, refined oil and petrochemical process products with viscosity less than 880mm2/s, and the solid particle content is not more than 3%. It can also be applied to the transmission of other liquids with similar chemical properties.

Model description

Structural features

1. Shell

The pump body is a horizontal horizontal split structure, and the suction and discharge ports are under the pump axis line. During maintenance, there is no need to move the pipeline and motor, but only to open the pump cover and lift out the rotor for maintenance;

The pump body is a centerline supporting structure. When the temperature of the shell, suction inlet and discharge outlet changes, the shell will be uniformly deformed, which has little impact on the accuracy;

The pump pressure chamber is a double volute structure to balance the radial force, eliminate or reduce the alternating stress acting on the rotor, improve the impact of fatigue on the shaft, and extend the service life of the pump;

The suction chamber is semi spiral, increasing pre rotation to improve the anti cavitation performance of the pump;

The pump shell wall thickness is analyzed and calculated by finite element method to fully meet the requirements of design pressure level. At the same time, according to the requirements of API610 standard for pump safety and reliability, there is a corrosion allowance to ensure safety;

2. Impeller

Advanced hydraulic software and CFX fluid simulation analysis software are used for hydraulic design, with high pump efficiency and wide efficient area within the full flow range;

The impeller is optimally designed with excellent cavitation performance, which is very suitable for low cavitation occasions;

The first stage impeller is of single suction structure or double suction structure, giving full consideration to efficiency and cavitation performance. Considering the viscosity characteristics of the conveying medium, the blade width was appropriately increased in the design to ensure high operation efficiency during oil transportation;

3. 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 impeller keys are staggered and symmetrically arranged on the shaft in a 120 ° circle to ensure the rigidity of the shaft and reduce the deflection of the rotor;

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

The impeller is arranged back to back to ensure that the axial force is completely balanced.

4. Bearing type, lubrication and cooling

The following three types of bearings are used: rolling bearings are used for both radial and thrust, dynamic pressure bearings are used for both thrust and radial, or radial fluid dynamic pressure and rolling thrust bearings, and their service life is at least 40000 hours under rated conditions;

The lubrication of bearings adopts the design of large oil pool for thin oil lubrication, which can meet the needs of high-speed operation and ensure that the continuous operation of bearings under rated conditions is not less than 25000 hours;

Cooling fins are cast outside the bearing body and equipped with fans for combined cooling to ensure that the temperature rise of the bearing 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.