water ring vacuum pump repair knowledge

The eccentric rotor with fixed blades is installed in the water ring vacuum pump. It is a kind of rotary variable volume vacuum pump, in which water (liquid) is thrown to the stator wall, and water (liquid) forms a liquid ring concentric with the stator, and the liquid ring and rotor blade together form a variable volume vacuum pump.

Repair of bearing wear of water ring vacuum pump shaft

The wear problem of transmission parts is a common equipment problem existing in production-oriented enterprises, and the number is large and the damage is frequent, including bearing positions, bearing seats, bearing chambers, keyways and threads of various shafts, rollers, reducers, motors, pumps, etc.

Solution: the traditional repair welding machine processing method is easy to cause material damage, resulting in deformation or fracture of parts, with greater limitations; brush plating and spray machining methods often need outsourcing, which not only has a long repair cycle and high cost, but also can not fundamentally solve the cause of wear (metal impact resistance and yielding ability is relatively high) because the repair material is metal material Poor).

Repair steps:

1. Mold processing: making standard split die

2. Surface treatment: degreasing, polishing and cleaning to ensure that the surface is clean, dry and firm.

3. Blending material: accurate proportion and even blending.

4. Coating material: ensure bonding, filling and thickness.

5. Installation mold: Brush release agent, install and fix to ensure that surplus material is extruded.

6. Demoulding: after curing, remove the mold to clean up the surplus materials. The materials can not be knocked, but can be removed by polishing machine, file and other tools to meet the installation requirements.

Repair of corrosion and erosion of water ring vacuum pump

The forms of metal corrosion can be divided into overall (uniform) corrosion and local corrosion. The former occurs more evenly on the whole surface of the equipment, while the latter occurs only locally. For example, pitting corrosion, crevice corrosion, intergranular corrosion, stress corrosion cracking, corrosion fatigue, hydrogen corrosion cracking, wear corrosion, delamination corrosion, etc.

Solution: it is one of the effective anti-corrosion measures to use polymer composite repair material to carry out surface organic coating anti-corrosion. Surface adhesive coating protection can be widely used in the repair and pre protection coating of abrasion, cavitation and corrosion parts. It has good chemical resistance, excellent mechanical properties and adhesive properties. Compared with the traditional welding repair of pressure vessel, it has the characteristics of simple construction, low cost, safety performance and good repair effect.

Repair steps:

(1) Surface treatment: thoroughly remove the surface oxide layer and clean the surface with acetone.

(2) Blending materials: strictly in accordance with the proportion of blending, and stirring evenly, until there is no color difference.

(3) Coating material: apply a thin layer of material to ensure bonding and complete coverage, and then evenly apply the material to the repair surface to reach the required repair thickness.

(4) Curing: 24 hours / 24 ℃ (material temperature). When the temperature of the material is increased by 11 ℃, the curing time will be shortened by half, but the rising temperature shall not exceed the bearing temperature of the material.

(5) Installation and precautions: install according to the assembly requirements, repair and protect the material should avoid being knocked or impacted by external force, if the material affects the assembly, it can be treated by grinding method, never knock, to avoid damage to other materials.

Causes and removal of scaling in vacuum pump

Whether in the South or in the north. Scaling is a process, which is not generated at once. With the generation of scale, its impact on the paper machine is also gradually emerging. Therefore, we should not take it lightly. We should persevere. We should control and prevent scaling at the beginning, which will produce long-term benefits.

Scaling reason: water quality influence. High pH value and high hardness. The sealing degree of papermaking white water is increased, the content of insoluble substance is high, and the scale ion is accumulated. Extensive use of fillers. Temperature. As the water temperature rises, the cooling system is not working well. If the water circulation system is not cleaned and maintained regularly, the possibility of scaling will be increased.

Solution: for a long time, traditional cleaning methods such as mechanical methods (scraping, brushing), high-pressure water, chemical cleaning (pickling) have many problems in cleaning equipment: the deposits such as scale cannot be completely removed, the acid solution causes corrosion to the equipment, and the residual acid causes secondary corrosion or corrosion under the scale on the material, which eventually leads to the replacement of the equipment. In addition, the cleaning waste liquid has It needs a lot of money for wastewater treatment.

For solutions to common problems of vacuum pump, the website “technical knowledge” column has detailed explanation. If you have any questions about vacuum, please feel free to contact us.