Summer weather temperatures are very high, in order to ensure that the Roots fan better work in the design process need to consider the high temperature resistance, then theRoots fan resistantWhere is the embodiment of high temperature design?
I. Sealing of high temperature gases
High-temperature gas sealing using double end mechanical seal, not only good sealing, in line with the medium on the sealing performance requirements, and circulating flow of the machine seal sealing liquid can take away part of the heat conduction through the spacer and its own heat, so that the Roots fan bearings, gears and other transmission parts need to run at low temperatures in a good state of work. For the sealing material in addition to media suitability should be considered, but also consider the adaptability of high temperature. The seal adopts corrosion-resistant and high-temperature-resistant metal material and perfluoroether material O-ring.
II. Design of insulation structures
In order to reduce the impact of high temperature gas on the lubrication drive of the three-leaf Roots drum machine, heat insulation measures need to be considered in the structural design. Side plates are added to the partitions at both ends of the blower, and a heat-insulating layer - a heat-insulating gasket with a low thermal conductivity - is added between the side plates and the partitions to effectively reduce the heat transfer from the machine chamber to both ends. At the same time, a heat-insulating gasket is also used between the wall plate and the partition plate to reduce the heat transfer from the partition plate to the wall plate. This heat-insulating structure and the selection of heat-insulating materials are conducive to reducing the heat transfer from the gas heat to the mechanical transmission parts.
III. Auxiliary cooling measures
Even the best thermal insulation materials can not reach the adiabatic effect, heat transfer is bound to exist, under the influence of high temperature, part of the heat will be through the air cavity and rotor source to the seal, wall panels, bearings, oil tanks and gears to transfer. In order to ensure the reliable operation of the blower, the wall panels on both sides of the blower are changed from the conventional closed structure to the open structure, relying on air convection to further reduce the temperature of the wall panels and shaft temperature. The main and auxiliary oil tanks adopt a reinforced water-cooled jacket structure, which fully exchanges heat to reduce the temperature of the lubricating oil.
Fourth, the parts with the impeller parts clearance
Roots drum machine parts and components of the fit size should take into account the effect of temperature. Fan casing clearance, impeller clearance, wallboard clearance and gear clearance in the design and manufacture of Roots Drum Machine for the important design points, Roots Drum Machine high temperature use and room temperature use comparison, the temperature field of the components of the difference between the larger, on the various parts of the design of the gap is also a greater impact.
V. High temperature materials
The materials of the main parts of high temperature gas overflow are high-performance ductile cast iron, the O-ring seals are made of perfluoroether, and the surface coating of the parts is made of high temperature resistant paint. The selection of other parts such as oil seals, bearings and lubricating oils all take into account the temperature adaptability.