Engineering Systems

Practice shows that most prevalent in engineering systems of buildings have pumps domestic production: console – type K, one-piece – such as im and linear – such as kml. These are simple, adapted to domestic conditions of operation units have successfully established themselves on objects industries and utilities. However, a limited number of sizes, lack of automation that helps protect the unit from working in emergency operation, and even more to include pumps into a single system dispatch under current conditions are a deterrent to mass use. In addition, a number of design flaws require increased attention to the units by the staff. Thus, the head of the energy section of the Moscow branch of CenterTelecom sf Kuzmin, said: " One of the most critical nodes defining performance characteristics of pumps, a shaft seal.

This element has the following functions: to prevent leakage of the fluid from the pump, preventing the ingress of air into the flow of working with discharge of the input, form a chamber for cooling of the pump when pumping hot liquids. There are several types of shaft seals: mechanical, dynamic, non-contact, magnetic, and lip. However, domestic manufacturers of pumps, a number of reasons, restricted the use of gland packing. It is known that the main disadvantage of these seals is their extremely short life, as well as the need for constant monitoring and pull-ups, which leads to significant costs of the attendants ". It suffices to note that the tightening of printed seal gland shall be such that through He was provided a leakage of water in an amount of 0,2 – 0,3 l / h for the removal, which is released by friction heat and to lubricate the rubbing surfaces.