D, DF, DY, MD horizontal multi-stage centrifugal pump

1. Product Overview:
This series of pumps are horizontal single-suction multi-stage segmented centrifugal pumps. They adopt the hydraulic model of high-efficiency energy-saving products recommended by the country. They have high efficiency, wide performance range, It has the advantages of safe and stable operation, low noise, long life, and convenient installation and maintenance.
The product can be used to transport clean water without solid particles (abrasives), suspended solids or other liquids with physical and chemical properties similar to clean water. It can also be used to transport hot water, oil, corrosive or abrasive media, etc. by changing the material of the pump (or the material of the pump flow parts), sealing form and adding a cooling system.
The allowable pressure at the pump inlet is less than.
According to its scope of use, it is mainly divided into the following types:
Type: used to transport clean water that does not contain solid particles and has a temperature below ℃, or liquids with physical and chemical properties similar to clean water. Suitable for use in mines, factories and urban water supply and drainage projects.
Type: used to transport corrosive liquids that do not contain solid particles and have a temperature of ℃~℃. Users can reasonably select the material of the pump, sealing form, pump structure and determine the capacity of the motor based on the name, concentration, specific gravity, operating temperature and pump inlet pressure of the conveyed medium.
Type: used to transport oil and petroleum products that do not contain solid particles, have a temperature of ℃~℃, and a viscosity of less than centipoise.
Type: used to transport neutral mine water and other similar sewage with a particle content of &.%, a particle size of &., and a temperature of ~℃.
2. Model meaning:
For example ()
& means multi-stage clean water centrifugal pump
means corrosion-resistant multi-stage centrifugal pump
means multi-stage centrifugal oil pump
Indicates wear-resistant multi-stage centrifugal pump
& Indicates the flow rate at the design point is/
& Indicates the single-stage head at the design point is
& Indicates the number of stages
Such as
& means the diameter of the pump suction inlet is
means a multi-stage centrifugal clean water pump
& means the single-stage lift at the design point of the pump is
& means the number of stages is
3. Structural features:< br/> The pump is a horizontal, single-suction, segmented multi-stage centrifugal pump. The suction port is horizontal and the discharge port is vertically upward. The pump housing parts such as the water inlet section, the middle section, and the water outlet section are connected together through tightening bolts, and the number of stages of the pump is selected according to the pump lift.
The rotor part of this series of pumps is mainly composed of impellers, bushings, balance plates and other parts installed on the shaft. The number of impellers depends on the number of stages of the pump. The parts on the shaft are fastened with flat keys and shaft nuts to integrate them with the shaft. The entire rotor is supported by rolling bearings or sliding bearings at both ends. The bearings vary according to model and do not bear axial force. The axial force is balanced by the balance plate.
The sealing surfaces between the inlet section, middle section and outlet section of the pump are all sealed with sealant or rings. The rotor part and the fixed part are equipped with sealing rings, guide vane sleeves, etc. for sealing. When the sealing ring When the wear degree of the guide vane sleeve has affected the working performance of the pump, it should be replaced.
There are two types of shaft seals: mechanical seals and packing seals. When the pump is sealed with packing, the position of the packing ring must be correct, and the tightness of the packing must be appropriate so that the liquid can seep out drop by drop. Various sealing components of the pump are installed in the sealing cavity, and water at a certain pressure must be introduced into the cavity to function as water seal, water cooling or water lubrication. A replaceable shaft sleeve is installed at the shaft seal to protect the pump shaft.
The pump allows the rotor to swim axially in the pump casing during operation. This type of pump generally adopts a rolling bearing and dry oil lubrication structure (the type pump can adopt a sliding bearing and thin oil lubrication structure, or a rolling bearing and dry oil lubrication structure. oil lubricated structure).
This series of pumps are directly driven by the prime mover through an elastic coupling. Viewed from the direction of the prime mover, the pump rotates clockwise.
(If the user has special requirements for the material and structure of the pump, they can negotiate with the company. The company can change the inlet and outlet directions of the water pump according to the user's needs, and can realize the multi-outlet structure and function of this series of pumps.)
4. Material of the flow-passing parts:
Type: & The flow-passing parts are cast iron, and the shaft is # steel
Type: The flow-passing parts are divided into cast steel and stainless steel according to the usage requirements. According to the transmission medium Temperature and corrosiveness determine the material
Type: The flow-passing parts are divided into cast iron, cast steel and cast stainless steel according to the use requirements, and the material is determined according to the temperature of the conveying medium
Type: The material of the flow-passing parts is wear-resistant cast iron or ball mill cast iron.