What are the disassembly sequences and techniques for vertical self-priming centrifugal oil pumps and their applications

（1） Dismantling sequence and technology of vertical self suction centrifugal pump: After preparing for the dismantling of the vertical self suction centrifugal pump, the following steps and requirements should be followed

① Remove the connecting bolts of the flange before and after the outlet valve of the pump on the medium pipeline, and separate the pump from the medium pipeline. Remove the cooling water pipe. Disconnect the coupling between the pump and the motor and remove it from the pump shaft

② Unscrew the pump base bolts, and at the same time, number the gaskets at each base bolt in sequence. When reinstalling, keep them in their original positions to reduce alignment work

③ Disassemble the bearings. First, unscrew the connecting bolts between the front and rear bearing seats and the pump body, remove the bearing seats, and then extract the bearings axially

④ Remove the shaft seal. Unscrew the connecting nut between the gland and the pump body, and extract the gland axially to remove the packing or mechanical seal

⑤ Disassemble the balance plate. Unscrew the connecting nut between the tail cover and the tail section, remove the tail cover, and then take out the balance plate axially. Loosen the connecting screw between the balance ring and the pump body to remove the balance ring

⑥ Dismantling of long rod bolts. The front, middle, and tail sections of a segmented pump are fixed together by several long bolts, forming a complete pump body. These bolts are also called long rod bolts. When tightening the long rod bolts, the axial sealing surfaces between each section are tightly fitted, preventing the pressure medium in the pump chamber from leaking outward. Excessive tightening force of long rod bolts can cause damage to parts; If the tightening force is too small, the sealing surface will leak. Some manufacturers provide the pre tightening force value of long rod bolts in the instruction manual. When assembling after repair, tighten the bolts according to the specified value; Most manufacturers do not provide the pre tightening force value for long rod bolts, which requires that during on-site maintenance, the tightening force should be moderate based on the comparison of the tightening length before and after disassembly. A simple approach is to number each long rod bolt and its corresponding nut in sequence before disassembly, for example, number 1, 2, I3,... clockwise, and number the other end counterclockwise. The corresponding bolt hole of the bolt should also be numbered accordingly, so that the bolt and nut can still be reinstalled in their original place. Polish the bolt end face and nut end face clean with sandcloth, and measure the length of the nut exposed at both ends of the same bolt

When assembling, use the same method to measure and calculate the value, so that the value is equal to the value before disassembly. Record the extension of the long rod bolt of the segmented self suction centrifugal pump as an example

After measuring and recording, start dismantling the long rod bolts. When removing the long rod bolts, keep two at a distance of 180 ° to prevent the front, middle, and tail sections from suddenly falling apart and damaging the rotor or other parts

To avoid bending the pump shaft due to the middle section falling down, temporary support should be added to the lower side of the middle section when removing the long rod bolt

⑦ Disassemble the tail section volute. Gently tap the flange of the tail section with a hammer to loosen it and remove it

⑧ Disassemble the tail impeller. The fit between the impeller and pump shaft is a clearance fit, but due to the action of the medium, it may rust together. When disassembling, gently tap around the impeller with a wooden hammer to loosen it, and then extract it axially

Dismantle the middle section. Use a pry bar to pry around the middle section to remove it. Remove the gear sleeve on the pump shaft between the impellers. Then, the population sealing ring and guide wheel can be removed from the middle guide wheel

Using the same method, remove the remaining impeller and middle section until the suction cover is reached

After disassembly, bearings, shafts, mechanical seals, etc. should be cleaned with kerosene to check for damage, excessive wear or deformation, and decide whether to repair or replace them. Remove the gasket between each section and remove rust

(2) Where are self suction centrifugal pumps commonly used?

1. Self suction centrifugal pumps are a type of self suction centrifugal pump with high performance.

. With its compact structure, easy operation, smooth operation, easy maintenance, and long service life, it has always been the leader in similar products

2. Not only is it widely applicable, but the price is also grounded and can be accepted by many enterprises

3. The self suction centrifugal oil pump also has a strong drainage force, coupled with its internal structural design, which reflects the water-saving function. The self suction height of this model can reach 1 meter, and the self suction time is also very short

The most common ones are in tea gardens, nursery gardens, large-scale orchards, farms, etc. These places have a large land area and require his assistance in tasks such as irrigation, fertilization, and pesticide application. In addition to improving work efficiency, it can also save on the cost of raw materials. On the basis of even rain and dew, it saves labor costs. No wonder these places have the presence of self suction centrifugal oil pumps. Of course, in order to achieve such efficiency, the assistance of a rocker nozzle is also needed, so that small raindrops or spray like liquid can appear

It seems that products with high sales have their own advantages. The advantages of self suction centrifugal oil pumps are not limited to the ones we introduced, but even involve more usage areas than we mentioned. From this, it can be seen that in order for a product to stand out, it needs to have many characteristics and practicality, which will attract many people to try and use it, thus recognizing the performance of this product. If you haven't installed such equipment in your garden yet, it's really worth considering