High-temperature submersible motor centralizing bearing and centralizing shaft sleeve assembling structure and application thereof

Abstract

The invention provides a high-temperature submersible motor centralizing bearing and centralizing shaft sleeve assembling structure and application thereof. According to the high-temperature submersible motor centralizing bearing and centralizing shaft sleeve assembling structure, a brass lamination segment of an assembling segment of a stator core and the excircle of a centralizing bearing is omitted, and a silicon steel sheet is used instead; the centralizing bearing is made of a non-magnetic austenitic stainless steel material, and an inner hole is nitrided or thermally sprayed to prepare awear-resistant layer; the centralizing shaft sleeve is made of a QAL9-4-4-2 or QAL10-4-4 aluminum bronze material; and the assembly structure is applied to a high-temperature submersible motor, the mechanical loss can be reduced, the service life of the motor and the service life of the assembly structure are prolonged, a stable oil film can be formed between the centralizing bearing and the centralizing shaft sleeve during working so as to ensure lubrication and heat dissipation of the bearing, and faults such as rotor bore sweeping, vibration and winding burnout can be avoided.

Description

technical field [0001] The invention belongs to the technical field of electric submersible pumps, and in particular relates to an assembly structure of a central bearing and a central shaft sleeve of a high-temperature submersible motor and an application thereof. Background technique [0002] The structure of the submersible motor is thin and long, and it is composed of multi-section unit motors. The stator is composed of a shell, an iron core, and a winding; the rotor is composed of a motor shaft, multiple unit rotors, and a central bearing. Unit rotors are separated from unit rotors by central bearings, see figure 1 . The gap between the inner hole of the stator and the outer diameter of the rotor is called the air gap, and the size of the air gap has a great influence on the electromagnetic performance of the motor. The centering bearing is mainly used to radially support the rotor to ensure the air gap value and prevent the rotor from sweeping; the inner hole of the...

AI Technical Summary

Problems solved by technology

As a result, the mechanical loss of the motor increases and the output power decreases

In addition, the tin bronze material used to make the centering bushing in conventional motors, such as ZQSn10-1, when the temperature is higher than 180 ° C, the wear resistance is reduced and the wear is accelerated, resulting in the friction pair between the centering bearing and the centering bushing The gap increases, and the increase in the gap leads to the strengthening of the unilateral magnetic pulling force on the rotor, which in turn causes the vibration of the rotor to increase, and the vibration further increases the gap between the friction pairs. Fever, even the winding short circuit burned

Therefore, the centralizing bearing and centralizing bushing of the normal temperature submersible motor cannot be used in the high temperature motor

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