Several common water ring vacuum pump problems and solutions

Time：

2020-02-08

The water ring vacuum pump (referred to as the water ring pump) is a coarse vacuum pump. The ultimate vacuum it can obtain is 2000~ 4000Pa, and the vacuum degree of the unit composed of the Roots vacuum pump can reach 1~ 600Pa. The water ring pump can also be used as a compressor, called a water ring compressor. It is a low-pressure compressor with a pressure range of 1~ 2 × 105Pa gauge pressure.
1. Repair of wear and tear of bearing position of water ring vacuum pump shaft
The wear problem of transmission parts is a common equipment problem existing in production enterprises, and the number is large, and the shaft head of the damaged water ring vacuum pump is worn and complicated, including various shafts, rollers, gear reducers, motors, pumps, etc. Bearing position, bearing seat, bearing chamber, keyway and thread and so on. 　　
Solution: The traditional repair welding machine processing method is easy to cause material damage, resulting in deformation or breakage of parts, which has great limitations; the methods of brush plating and spraying and re-machining often require outsourcing, which not only has a long repair cycle and high cost, but also The repaired material is still a metal material, which cannot fundamentally solve the cause of wear (the metal has poor impact resistance and concession). 　　

Polymer composite repair materials have comprehensive properties such as super adhesion, excellent compressive strength, wear resistance and corrosion resistance. The use of Meijiahua 2211F polymer composite repair material can be repaired on-site without disassembly when the wear size of the transmission part is relatively small, which not only avoids machining, but also has no thermal stress and thermal influence of repair welding, and the repair thickness is not limited. The wear resistance and the concession that metal materials do not have ensure 100% contact and coordination of the repair part, reduce the impact and vibration of the equipment, avoid the possibility of wear, and greatly prolong the service life of equipment components (including bearings), saving a lot of downtime for enterprises, creating huge economic value.
Repair steps: 　
1. Mold processing: making standard folio molds 　
2. Surface treatment: oil removal, grinding and cleaning to ensure that the surface is clean, dry and strong. 　
3. Harmonizing materials: the ratio is accurate and the reconciliation is uniform. 　　
4. Application material: ensure bonding, filling and thickness. 　　
5. Installation mold: brush release agent, install and fix to ensure that excess material is extruded. 　　
6. Demoulding: After curing, remove the mold to clean up the excess material. The material cannot be knocked, and can be removed by tools such as grinders and files to meet the installation requirements.
7. Repair of corrosion and erosion of water ring vacuum pumps The forms of metal corrosion can be divided into two categories: comprehensive (uniform) corrosion and local corrosion. The former occurs more evenly on the entire surface of the equipment than the corrosion and wear repair of the pump cavity of the water ring vacuum pump, and the latter only occurs locally. Such as porosity, crevice corrosion, intergranular corrosion, stress corrosion cracking, corrosion fatigue, hydrogen corrosion cracking, wear corrosion, delamination corrosion, etc. 　　
The use of polymer composite repair materials to implement anti-corrosion of surface organic coatings is one of the effective anti-corrosion measures at present. Surface adhesion protection can be widely used in the repair of abrasion, cavitation, corrosion parts and pre-protective coatings. It has good chemical resistance and excellent mechanical properties and bonding properties. Compared with traditional pressure vessel welding repair, it has the characteristics of simple construction, low cost, safety performance and good repair effect.