Multi-head large-displacement equal-wall-thickness screw pump stator production forming equipment and forming process thereof

Abstract

The invention relates to the technical field of oil extraction, in particular to multi-head large-displacement equal-wall-thickness screw pump stator production forming equipment and a forming processthereof, and aims to shorten the stator machining process and improve the stator machining precision. The equipment mainly comprises a main feeding mechanism, a forming mechanism, and an auxiliary feeding mechanism positioned between the main feeding mechanism and the forming mechanism; the main feeding mechanism comprises a hydraulic clamping and feeding fixture, and a driving part for driving the hydraulic clamping and feeding fixture to move; the forming mechanism comprises a hydraulic forming machine; the hydraulic forming machine, the hydraulic clamping and feeding fixture and the driving part are controlled through a digital combined adjusting device; and the digital combined adjusting device is a PLC control system. A pipe forming mold and related parts are mounted on the hydraulicforming machine to form a special hydraulic forming machine tool and a hydraulic clamping and feeding mechanism; and the digital combined adjusting device is used for controlling the whole machiningflow, so that the size precision and the straightness of machined stator pipes are improved, and qualified stator pipes are machined.

Description

technical field [0001] The invention relates to the technical field of oil extraction equipment, in particular to the manufacturing and molding equipment and molding process for the stator of a multi-head, large-displacement, equal-wall-thickness screw pump. Background technique [0002] The screw pump is a positive displacement rotor pump, which relies on the volume change of the sealed cavity formed by the screw (rotor) and the bush (stator) to suck in and discharge liquid. Equal-wall-thickness screw pump is an improvement to the conventional screw pump. Its stator has equal and thinner thickness, which solves the problems of uneven stress, heat dissipation and temperature expansion of the conventional pump stator. Compared with the single-head screw pump, the displacement of the multi-head screw pump with large displacement and equal wall thickness is greatly increased, and because of the uniform wall thickness structure, the eccentricity is reduced, which avoids the unev...

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Problems solved by technology

[0004] However, due to the complexity of the above-mentioned process, its processing efficiency is low in actual production, and the stator tube needs to be formed with the cooperation of internal and external molds, and the internal and external molds are not easy to process and manufacture, and will produce certain errors. Processing screw pumps through internal and external molds The stator will further increase the machining error, the lead and cavity error of the metal stator cannot be effectively controlled, and the precision is not high

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