Two-screw pump rotor interference detection method based on assembly error

Abstract

The invention discloses a two-screw pump rotor interference detection method based on an assembly error. The method comprises the following steps of a, transforming rotor hook faces of a drive screw rod and a driven screw rod generating the assembly error from a driven coordinate system o1x1y1z1 and a moving coordinate system o2x2y2z2 into a static coordinate system OXYZ solidified on a pump body through coordinate transformation; b, solving a contact line of spiral faces of the drive screw rod and the driven screw rod; c, solving inter-tooth clearance distribution of the drive screw rod and the driven screw rod under the assembly error according to the contact line; d, according to a minimum value of clearance distribution and a minimum value of a given clearance belt, judging whether the drive screw rod and the driven screw rod are interfered with each other under the existence of the assembly error. According to the method, screw rod rotor space positions and inter-tooth clearance distribution changes can be detected under a true running state of the assembly error, so that the leakage rate of a screw pump is quantified; in addition, the rotor inter-tooth clearance distribution changes under various position deviations are calculated, so that accurate quantitative indexes are provided for shell and rotor processing, bearing selecting and the like.

Description

technical field [0001] The invention relates to the field of interference detection of screw pumps, in particular to an interference detection method for twin-screw pump rotors based on assembly errors. Background technique [0002] Screw pumps are divided into single-screw pumps, twin-screw pumps, three-screw pumps, and five-screw pumps according to the number of screws. Among them, due to its superior performance, the twin-screw pump is mainly manifested in reasonable structure, energy saving and environmental protection, the screw rotor will not have unilateral wear, less leakage points, low leakage, and effectively reduce the impact of oil pollution on the environment. According to the theoretical tooth profile design and processing, a pair of screws with theoretical tooth surfaces that are parallel to the rotor axis and in contact with each other (that is, without gaps) will be obtained. However, the actual processed screw rotors are often due to inevitable manufacturin...

AI Technical Summary

Problems solved by technology

According to the theoretical tooth profile design and processing, a pair of screws with theoretical tooth surfaces that are parallel to the rotor axis and in contact with each other (that is, without gaps) will be obtained. However, the actual processed screw rotors are often due to inevitable manufacturing and installation errors. (Axis is not parallel, etc.), due to factors such as force deformation, thermal expansion, and wear of parts during operation, it cannot operate normally, and even accidents such as rotor scratches and seizures are caused by rotor interference.

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