【Haichuan Equipment Guessing Game】The pump casing is divided into two halves – is there any risk of leakage now?

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The advantage is easy disassembly for maintenance, while the disadvantage is an increase in leakage points. Suitable for media with low leakage risk. Guess the water pump.

Slurry pump. There is also a set of overcurrent components inside.

Those who are interested can discuss it. 18032233998 is the same WeChat ID

Pumps suitable for transporting liquids (water) containing suspended solids are generally referred to as slurry pumps. It is currently one of the essential equipment in various processes of mineral processing and coal processing plants. Slurry pumps can be classified according to various criteria into single-stage/multi-stage, single-suction/double-suction, cantilever, horizontal/vertical types, as well as those with horizontally split or vertically integrated pump casings. In terms of its working principle, a slurry pump is essentially a type of centrifugal pump; it increases the energy of the solid-liquid mixture by utilizing centrifugal force, converting electrical energy into kinetic and potential energy of the medium. I. Pump head structure: The professional terms for the pump head of a slurry pump are the pump body and the pump cover. 1. The pump body features a double-layer casing (an inner and an outer metal structure). 2. The double-casing design is of a vertically split type, and the outlet positions can be arranged at 45-degree intervals; the pump can be installed and used in 8 different rotation positions. 3. To effectively prevent shaft seal leakage, a combination of dynamic sealing, packing sealing, or mechanical sealing is employed. 4. A labyrinth-type gap seal is provided between the impeller and the rear shield, which significantly reduces the leakage of slurry into the stuffing box and effectively ensures the reliability of the seal. 5. The impeller is equipped with back vanes to promptly discharge the recirculating slurry, thereby increasing the volumetric efficiency, reducing recirculation and erosion, and extending the lifespan of the flow-through components. 6. A removal ring is provided to facilitate maintenance and disassembly, preventing shaft cutting due to the inability to remove it. II. Shaft seal types: The shaft seal types include secondary impeller dynamic sealing + packing seal, packing seal, and mechanical seal. The shaft seal device serves to seal the gap between the pump body and the pump shaft, preventing air from entering the pump and excessive water from leaking out of it. The sealing types of centrifugal slurry pumps are divided into three categories: packing seal, reduced-pressure cover impeller seal, and mechanical seal. The secondary impeller seal is a hydrodynamic seal; it relies on the pressure generated by the secondary impeller to prevent leakage of the liquid at the impeller outlet. Back vanes installed on the impeller cover, along with a water seal ring and packing, are used to prevent air from entering. The back vanes and water seal ring also help reduce the pressure at the packing area, thereby preventing contaminants from getting into the seal. III. Bracket Structure: The bracket structures for slurry pumps include horizontal split-type and cylindrical types. 1. To extend the service life of the bearings, optimizations were made in terms of hydraulic design and structural design. 2. It ensures a reasonable distribution of radial and axial forces, and the appropriate selection of bearing types, models, as well as cooling and lubrication methods, thereby meeting the requirements of low heat generation and long service life for bearings. IV. Transmission method: Direct DC drive (elastic sleeve pin coupling) and narrow V-belt drive (CR, CL, CV, ZV). V. Bearing Assembly: The bearing assembly of the slurry pump features a cylindrical structure, which facilitates adjusting the gap between the impeller and the front shield; it can be removed as a whole for maintenance purposes. The bearings are lubricated with grease. Routine maintenance: 1. The water pressure and volume for the bearings must meet the specified requirements; adjust (or replace) the tightness of the packing as needed to prevent leakage from the shaft seal. And replace the shaft sleeve in a timely manner. 2. When replacing the bearings, it is essential to ensure that there is no dust inside the bearing assembly and that the lubricating oil is clean. During operation, the temperature of the bearings should generally not exceed 60–65°C, with a maximum of 75°C. 3. It is necessary to ensure the coaxiality between the motor and the pump, as well as to keep the elastic pads in the coupling intact and in good condition; they should be replaced promptly if damaged. 4. Ensure that the pump components and piping system are installed correctly, firmly, and reliably. 5. Some components of the slurry pump are vulnerable parts; it is necessary to pay attention to their wear and tear during regular use, and to repair or replace them promptly. During the repair or replacement of the vulnerable parts of a slurry pump, it is necessary to ensure proper assembly and appropriate adjustment of gaps, in order to avoid tight friction. 6. The suction pipeline system of the slurry pump must be leak-free, and attention should be paid during operation to ensure that the suction inlet is not blocked. The media that slurry pumps need to handle often contain solid particles; therefore, the grates placed in the pump inlet chamber should meet the requirements regarding the size of particles that the slurry pump can handle, thereby reducing the risk of larger particles or long fibers entering the pump and causing blockages. Based on my understanding of slurry pumps, I hope this will be helpful to you.