An overview of the
LDY type series multistage centrifugal pump is on the basis of the old type Y multi-stage centrifugal pump, the introduction of foreign advanced technology to carry on the design. It is to better meet the needs of customers, in order to improve the reliability and energy efficiency as the center of equipment renewal and development of new products. This series of products of parts generalization degree is high, can be used in oil refining, petrochemical and chemical industry, containing no solid particles oil, liquefied petroleum gas and other flammable or toxic in high temperature and high pressure liquid.
To keep inheritance, LDY type oil pump structure, installation size, performance parameters of the basic to keep the same as the Y type oil pump, the hydraulic flow components adopt high efficiency and energy saving pump hydraulic model, the average efficiency of 2% to 5% higher than Y type multistage pump. According to the using conditions of different body parts to choose material of class ii and class iii, bearing parts, such as increasing cast steel and steel two kinds, for cold areas and outdoor use and Marine provides material such as convenient.
Structural characteristics of
LDY type multistage centrifugal pump is horizontal radial split sectional structure, the poles will be inhaled, middle, spit out Duan Liancheng one. Impeller on the shaft installed in the pump rotor, balance disc parts, etc. Axial force balance disc, the balancing drum and thrust bearing.
Using radial sliding bearing or bearing: drive on the radial ball bearing, the drive to use angular contact ball bearings, residual axial force balance. Bearing cooling are all made of water.
Shaft seal: using packing seal or mechanical seal, according to user needs.
Drive: pump through flexible diaphragm coupling driven directly by the prime mover.
Cooling water piping system: is according to the medium temperature and use requirement, for shaft seal cavity, bearing or support for cooling. Water each line suggestion 0.2 0.5 m after/h, pressure is 0.2-0.3 MPa. Seal flush is according to pump the medium temperature and pressure conditions vary.
Seal fluid pressure is generally higher than seal chamber pressure of 0.07-0.1 MPa. If belong to easy gasification medium, it should be higher than 0.175 0.2 MPa pressure gasification. Steam piping is to reduce when the medium temperature and precipitation of crystal, equipped with, its pressure is 0.1 MPa.
Direction of rotation: look from the driving end, pump is counterclockwise.