An Equal-diameter Connecting Device Between the Short Sections of the Mover Mandrel of a Linear Motor

Abstract

The invention discloses an equal-diameter connecting device between short joint core shafts of a linear motor mover. Between the steel, there are two symmetrical short shafts in the magnetic steel sleeve. There is also a connecting sleeve in the shaft cavity of the magnetic steel sleeve. A symmetrical short shaft assembly hole is formed in the connecting sleeve. The short shaft includes an anti-reverse section and a threaded connection. section and anti-loosening section, the threaded connection section is fixed through the external thread and the internal thread of the connecting sleeve, the anti-loosening section is assembled at the end of the shaft cavity of the magnetic steel sleeve, and the outer diameter of the anti-loosening section is the same as that of the connecting sleeve The outer diameters are the same, and an anti-reversal structure is provided at a position corresponding to the anti-reversal section on the short axis, and an anti-loosening structure is also provided at a position corresponding to the anti-loose section. The magnetic field strength of the mover in the invention is stable along the axial direction, and the efficiency of the motor is improved. Use the anti-loosening device instead of welding anti-loosening to improve the service life of the mover and reduce maintenance costs.

Description

Technical field [0001] The present invention relates to an underground submersible linear motor crude oil lifting device, specifically to a linear motor mover core shaft short internodal and other diameter connection device. Background [0002] The mover, or linear motor secondary, is an important part of the cylindrical linear motor. The design quality of this component directly affects the work efficiency and reliability of linear motors, and it is an area worth studying. In the past, the design of the rotor core shaft of the cylindrical linear motor mostly adopted the threaded connection between the mover mandrel and the short section plus the welding anti-loosening, and at the same time relied on the method that the outer diameter of the connecting sleeve was greater than the outer diameter of the mover core shaft to transmit the axial force generated by the motor. The negative impact of this method is: 1) the welding deformation affects the coaxiality of the mandrel. 2) The ...

AI Technical Summary

Problems solved by technology

The negative effects of this method are: 1) Welding deformation affects the coaxiality of the mandrel

2) The heat-affected zone of welding spreads to the adjacent magnetic steel, reducing the magnetic field strength of the affected magnetic steel

3) The mandrel after welding is not detachable, and the maintainability is poor, which increases the system maintenance cost

4) The geometric size of the inner hole of the local magnetic steel increases, resulting in a decrease in the volume of the magnetic steel and a decrease in the magnetic flux, which affects the uniformity of the axial magnetic field of the mover core shaft, resulting in a decrease in the axial thrust of the motor

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