Multi-blade roots pump rotor molded line

Abstract

The invention belongs to the field of fluid machinery, particularly relates to a multi-blade roots pump rotor molded line, and aims to solve the problem that in the prior art, the molded line design is limited when the ratio of the center distance A to the rotor diameter D (A / D) of an involute-pin tooth circular-arc rotor molded line in the prior art is less than a limit value. The multi-blade roots pump rotor molded line provided by the invention comprises a first rotor and a second rotor, wherein the first rotor and the second rotor are used cooperatively; the molded line of the first rotorcomprises a first tooth top rolling circular-arc segment, a first circular-arc segment, a first involute segment, a first circular-arc envelope segment, a first point meshing cycloid segment and a first tooth root rolling circular-arc segment in sequence; and the molded line of the second rotor comprises a second tooth top rolling circular-arc segment, a second circular-arc segment, a second involute segment, a second circular-arc envelop segment, a second point meshing cycloid segment and a second tooth root rolling circular-arc segment in sequence. The ratio of the center distance A to the rotor diameter D (A / D) of the multi-blade roots pump rotor molded line exceeds the limit value of the conventional involute-pin tooth circular-arc rotor molded line, so that the parameter value range can be wider.

Description

technical field [0001] The application belongs to the field of fluid machinery, in particular to a multi-lobe Roots pump rotor profile. Background technique [0002] Roots blower is an oil-free rotary blower. The Roots blower consists of a pair of intermeshing straight-toothed rotors, a pair of synchronous gears, a racetrack-shaped cylinder, wall panels at both ends, and a gear box. The rotors mesh with each other during rotation to form a periodically changing working volume, so that the suction and discharge of gas can be realized without internal compression; and there is no need for vulnerable parts such as suction valves and exhaust valves. Due to the complete symmetry of the rotor structure, the inertia force balance can be realized theoretically. [0003] The rotor shape of the Roots blower determines its area utilization coefficient, the rate of change of the volume of the element, and the unevenness of the gap between the rotors, and the area utilization coefficie...

AI Technical Summary

Problems solved by technology

However, if this ratio is less than a certain extreme value, the traditional profile of the involute-pin tooth arc type cannot be used, and the profile design is limited. This application provides a multi-lobe Roots pump rotor type Wire

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