A Large Thrust Cylindrical Linear Motor

Abstract

The invention relates to a high-thrust tubular linear motor which comprises a stator shell, a stator and a rotor. The stator is coaxially and fixedly mounted in the stator shell, the rotor is coaxially and slidably mounted in an inner cavity of the stator, the stator comprises silicon steel sheets and windings which are arranged at intervals and fixedly mounted on the stator shell, the rotor comprises a rotor shaft, permanent magnets and magnetic conduction rings, and the permanent magnets and the magnetic conduction rings are arranged at intervals on the rotor shaft. The high-thrust tubular linear motor is characterized in that the rotor shaft is made of hollow soft magnetic materials, a copper tube is coaxially sleeved outside the rotor, the windings and the silicon steel sheets are fixedly mounted at intervals to form the stator, and the windings and the silicon steel sheets correspond to the permanent magnets and the magnetic conduction rings of the rotor. The high-thrust tubular linear motor is ingenious in design, reasonable in structure, large in starting force, fine in tightness and reliable in operation.

Description

technical field [0001] The invention belongs to the field of motors, and relates to a linear motor, in particular to a large-thrust cylindrical linear motor. technical background [0002] At present, in most oilfields in my country, the energy consumption of oil production equipment has accounted for about 1 / 3 of the total energy consumption of oilfields, and the phenomenon of high energy consumption and low output has appeared, and the electricity bill is astonishing. The reason is that the load of the pumping unit in the oil field is a time-varying load with unique characteristics, which can be divided into dynamic and static load characteristics. The initial starting state of the pumping unit operation includes the static friction force of each contact surface overcome by the movement of the polished rod of the pumping unit, the balanced and fast energy storage, etc., which requires the starting torque of the dragging motor to be 3-4 times the actual load torque of the pu...

AI Technical Summary

Problems solved by technology

[0008] In addition, rare earth permanent magnet linear synchronous motors are difficult to start, and they will be placed underground during work. Such a working environment must be met to ensure the reliable operation of the system; the downhole space is very limited, and the size of the motor itself should be small in design, effectively increasing the power density per unit volume of the motor will make it possible to use it for downhole work

[0009] Through searching, no published patent documents identical or similar to the application of the present invention have been found

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