Performance range

Single stage (dsjh): two stage (gsjh):

Flow: q=84 ～ 1700m3/h flow: q=35 ～ 2000m3/h

Lift: h=65 ～ 250m lift: h=140 ～ 325m

Working pressure: 5MPa working pressure: 11mpa

Transmission medium temperature: t=-80 ℃ ~ +450 ℃; transmission medium temperature: t=-80 ℃ ~ +450 ℃

Transmission medium: suitable for petroleum refining, refining, petrochemical and chemical industry, natural gas industry and other occasions for transporting petroleum and chemical process products, also suitable for

It is used to transport various clean or neutral or highly corrosive chemical liquids with solid particles.

Structural features

1. Pump body

The pump body has high pressure. The design pressure of the pump body is 5MPa and 11mpa. According to the user’s requirements, the pump body can also be improved to be suitable for higher pressure media transmission.

The pump casing is radially split, which is especially suitable for conveying high temperature and high pressure as well as flammable, explosive or toxic liquids. Its installation method is the support of the center line, so as to reduce the deformation and displacement caused by thermal expansion and contraction to a low degree.

The high lift pump body adopts a double vortex chamber design to balance the radial force of the pump. Gsjh two-stage pump, the first and second stage pump body flow channels balance the radial force by 180 º inversion method.

The suction chamber is spiral and pre swirl is added to improve the cavitation resistance.

When the inlet is double suction, a distributor is added to the inlet passage to improve the flow conditions at the inlet, reduce noise and reflux, expand the performance range of the pump, and improve the efficiency of the pump.

The metal spiral wound gasket is used between the sealing surfaces of the flow passage parts to ensure that the pump can still ensure no leakage under high temperature and high pressure.

A pressure reducing chamber is set in front of the high-pressure end sealing chamber of the two-stage pump. The pressure reducing chamber is connected with the suction port of the pump through a balance pipe to reduce the pressure of the high-pressure end sealing chamber and maintain the same pressure of the two-stage pump.

The suction and discharge ports of the pump are vertically upward and cast into one with the pump body. When replacing wearing parts and wear-resistant parts, it is easy to replace without removing the inlet and outlet pipes and motor. The flange size and pressure class shall meet the requirements of American Standards Institute (ansi16.5) standard class or user standard.

For transporting high-temperature liquid or liquid requiring thermal insulation, the pump body is designed with a reliable thermal insulation or cooling system. The cooling system meets the requirements of API610 standard.

2. Impeller

Advanced hydraulic design software and CFX fluid simulation analysis software are used for hydraulic design. The pump has high efficiency and wide efficient area within the full flow range.

The impeller is precision cast to ensure accurate manufacturing of impeller profile, meet design requirements and ensure high efficiency.

According to the requirements of cavitation performance, the first stage impeller of gsjh two-stage pump can choose single suction or double suction impeller. The first stage double suction has good cavitation performance.

3. Rotor

The rotor is a support structure at both ends, with sufficient shaft diameter and rigid shaft design at heavy duty position.

All parts installed on the shaft shall be dynamically balanced with the rotor to ensure the reliability, stability and small vibration of the pump.

The pump shaft is made of high-quality alloy steel, and the shaft end adopts a conical shaft extension meeting the requirements of API610 standard, which makes the installation and disassembly of coupling, bearing and seal convenient and easy to maintain.

4. 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 the bearing: 1. The design of large oil pool with thin oil lubrication can meet the needs of high-speed operation and ensure that the bearing operates continuously for not less than 25000 hours under rated conditions; 2. Forced lubrication by external service station is adopted to ensure reliable lubrication.

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.