The use of correct cleaning methods to improve cleaning quality and reduce costs is one of the issues that repair workers must consider.
Cleaning in repair work includes mechanical external cleaning and parts cleaning. Parts cleaning can be divided into cleaning before appraisal, cleaning before assembly and cleaning before work preparation before part plating or bonding due to different purposes.
In the parts cleaning, the cleaning requirements of the plated and bonded parts are the highest, and the cleaning quality is not high. It is often the cause of coating or bonding failure, and the cleaning quality of the parts assembly has a great impact on the service life of the machine. Due to the serious failure of cleaning, the infiltration of a large amount of abrasives into the important friction pair or the clogging of the lubricating oil passage by dirt, resulting in early wear and accidental damage of the machine, it often occurs in some insufficiently formal repair work, which must be paid attention to. .
Now enumerate several cleanings of centrifugal pumps. The basic principles of specific removal will be explained in detail later.
1) Scrape off the scale and rust accumulated on the inner and outer surfaces of the impeller, the seal ring and the bearing, etc., and then clean and blow off with water or compressed air.
2) Clean the grease and rust accumulated on the joint surfaces of the shell.
3) Clean the water seal pipe and check whether the pipe is unblocked.
4) Clean the bushes and bearings, remove the grease, and then clean the oil ring and oil level gauge. The ball bearings should be cleaned with gasoline.
5) All parts and components not to be assembled temporarily should be protected with oil after cleaning.
The basic principle of cleaning is that all cleaning methods must fully consider the following basic requirements.
1) Ensure that the requirements for the cleanliness of the parts are met. During repair, various parts have different requirements for cleanliness. In assembly, the cleaning requirements of mating parts are higher than those of non-matching parts, moving parts are higher than static mating parts, and precision mating parts are higher than non-precision mating parts. For the surface of sprayed, plated, and bonded workpieces, the cleaning requirements are very high. When cleaning, different cleaning agents and cleaning methods must be adopted according to different requirements to ensure the required cleaning quality.
2) Prevent the corrosion of the parts, and no corrosion of any degree is allowed to the precision parts. When the parts need to be parked for a period of time after cleaning, the anti-rust ability of the cleaning fluid or other anti-rust measures should be considered.
3) Ensure the safety of operation, prevent fire or poisoning the human body and cause pollution to the environment.
4) Emphasis on economic benefits. Under the condition of ensuring the above conditions, the premise should be to improve work efficiency, reduce raw material costs, and reduce equipment costs to improve economic effects.
Post time: 2021-12-02
