A slurry pump refers to a mechanical device that converts electrical energy into kinetic and potential energy of a solid liquid mixture medium by increasing the energy of the medium through the action of centrifugal force (rotation of the impeller of the pump). Mainly applicable to industries such as mining, power plants, dredging, metallurgy, chemical engineering, building materials, and petroleum.
The commonly used slurry pump structures are as follows:
(1) Pump head architecture.
The pump body adopts a double-layer pump casing (inner and outer double-layer metal structure), and the double pump casing shell structure is vertically split. The water outlet position can be installed and used at intervals of 45 degrees and rotated 8 different positions. To effectively prevent shaft seal leakage, a combination of power seals, packing seals, or mechanical seals is used. There is a labyrinth gap seal between the impeller and the rear guard plate, which greatly reduces the leakage of slurry to the packing box and effectively ensures the reliability of the seal. The impeller is equipped with back blades to timely discharge the backflow slurry, thereby increasing the volume ratio, reducing backflow and erosion, and improving the service life of overcurrent components. For the convenience of maintenance and disassembly, a disassembly ring is provided to avoid cutting the shaft due to inability to disassemble.
(2) Bracket structure. The bracket structure is a horizontal open type, which has been optimized in terms of hydraulic and structural design to extend the service life of the bearings. Reasonable distribution of radial and axial forces, and correct selection of bearing form, model, cooling and lubrication methods, have been achieved to meet the requirements of low heat generation and high service life of bearings.
(3) Shaft seal form. The shaft sealing device plays a sealing role between the pump body and the pump shaft. It can prevent air from entering the pump and prevent a large amount of water from leaking out of the pump. The sealing form of centrifugal slurry pumps usually adopts a secondary impeller with packing seal. The secondary impeller with packing seal is a fluid dynamic seal, which relies on the pressure head generated by the secondary impeller to resist the leakage of liquid at the outlet of the impeller. At the same time, the impeller cover plate is used to install a back blade with water seal ring and packing to prevent air from entering. The back blade and water seal ring are also used to reduce the pressure at the packing, which has the effect of preventing impurities from entering the seal.
 
 
1. Main components of slurry pump:
The slurry pump mainly includes the pump body, pump cover, impeller, bracket, volute shell, shaft, bearing box, and bearings.
Mechanical seals, packing seals, couplings, left and right protective plates, shaft sleeves, etc.
What are the requirements for the operational performance of slurry pumps?
(1) The oil passage is smooth and well lubricated, implementing a "five fixed" three-level filtration system.
(2) Normal operation, without any abnormal vibration, noise or other phenomena.
(3) The pressure and flow rate are stable, the temperature of each part is normal, and the current is stable.
What are the daily maintenance requirements for slurry pumps?
(1) Strictly follow the operating procedures for starting, operating, and stopping, and keep operation records.
(2) Keep the equipment clean, dry, free of oil stains and leaks.
(3) Check the oil level inside the bracket daily to ensure it is appropriate. The correct oil level should be near the oil level line and should not exceed ± 2mm.
(4) Check the lubrication condition of each lubrication part in each shift.
(5) Regularly check the pump for abnormal sounds, vibrations, and leaks, and promptly address any issues found.
(6) Regularly check the bearing temperature, with rolling bearings not exceeding 75 ° C and sliding bearings not exceeding 65 ° C.