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A spindle sealing system for working motors under high temperature or high pressure environment

A high-voltage environment, working motor technology, applied in the direction of engine sealing, electromechanical devices, electrical components, etc., can solve the problems of motor thin oil leakage, motor damage, and easy damage of seals, so as to prevent thin oil leakage and prolong maintenance cycle , Improve the effect of sealing reliability

Active Publication Date: 2018-10-09
DONGFANG ELECTRIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The integrated submersible motor with a sealing device disclosed in this patent document is equipped with a sealing head on the upper end of the motor, directly connects with the submersible pump through the sealing head, and assembles a mechanical seal on the sealing head to meet the sealing requirements of the submersible motor. A single mechanical seal is easily damaged under the action of high temperature, high pressure and external multi-phase mixed liquid, resulting in the leakage of thin oil inside the motor, and at the same time, the external multi-phase liquid enters the inside of the motor and damages the motor, resulting in abnormal stability of the motor Work

Method used

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  • A spindle sealing system for working motors under high temperature or high pressure environment
  • A spindle sealing system for working motors under high temperature or high pressure environment
  • A spindle sealing system for working motors under high temperature or high pressure environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see figure 1 , a spindle sealing system for motors working in high temperature or high pressure environments, including a first joint 2 connected to the motor housing 1 and a second joint 4 connected to the main shaft 3, the first joint 2 and the second joint 4 are threaded connected, the main shaft 3 is covered with a piston rod 5, the piston rod 5 is connected with a piston 6, one end of the first joint 2 is connected with a piston end cover 7, and the other end is connected with a first seal, and the second joint 4 passes through The second seal is connected with the main shaft 3, the first joint 2, the second joint 4 and the main shaft 3 enclose a transition chamber 8, the motor housing 1, the main shaft 3 and the piston end cover 7 enclose an inner chamber 9, and the first joint 2 A first pressure balance hole 10 is opened on it, and a second pressure balance hole 11 is opened on the piston end cover 7 .

[0042] This embodiment is the most basic implementation. A...

Embodiment 2

[0044] see figure 2 , a spindle sealing system for motors working in high temperature or high pressure environments, including a first joint 2 connected to the motor housing 1 and a second joint 4 connected to the main shaft 3, the first joint 2 and the second joint 4 are threaded connected, the main shaft 3 is covered with a piston rod 5, the piston rod 5 is connected with a piston 6, one end of the first joint 2 is connected with a piston end cover 7, and the other end is connected with a first seal, and the second joint 4 passes through The second seal is connected with the main shaft 3, the first joint 2, the second joint 4 and the main shaft 3 enclose a transition chamber 8, the motor housing 1, the main shaft 3 and the piston end cover 7 enclose an inner chamber 9, and the first joint 2 A first pressure balance hole 10 is opened on it, and a second pressure balance hole 11 is opened on the piston end cover 7 .

[0045] The first seal is an end face mechanical seal, inc...

Embodiment 3

[0048] see image 3 , a spindle sealing system for motors working in high temperature or high pressure environments, including a first joint 2 connected to the motor housing 1 and a second joint 4 connected to the main shaft 3, the first joint 2 and the second joint 4 are threaded connected, the main shaft 3 is covered with a piston rod 5, the piston rod 5 is connected with a piston 6, one end of the first joint 2 is connected with a piston end cover 7, and the other end is connected with a first seal, and the second joint 4 passes through The second seal is connected with the main shaft 3, the first joint 2, the second joint 4 and the main shaft 3 enclose a transition chamber 8, the motor housing 1, the main shaft 3 and the piston end cover 7 enclose an inner chamber 9, and the first joint 2 A first pressure balance hole 10 is opened on it, and a second pressure balance hole 11 is opened on the piston end cover 7 .

[0049] The first seal is a radial seal, including a radial...

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Abstract

The invention discloses a spindle sealing system for a motor working under a high-temperature or high-pressure environment, which belongs to the technical field of motor equipment. The spindle sealing system comprises a first connector and a second connector; the first connector is connected with a motor housing; the second connector is connected with a spindle, and the first connector and the second connector are connected through screw threads. The spindle sealing system is characterized in that a piston rod sleeves the spindle; the piston rod is connected with a piston; one end of the first connector is connected with a piston end cover; the other end of the first connector is connected with a first sealing element; the second connector is connected with the spindle through a second sealing element; a transitional cavity is defined by the first connector, the second connector and the spindle; an internal cavity is defined by the motor housing, the spindle and the piston end cover; the first connector is provided with a first pressure balance hole, and the piston end cover is provided with a second pressure balance hole. Because the pressure difference between sealing is balanced by the piston, the sealing can work under a zero-pressure-difference environment, consequently, the sealing reliability is improved, and the stable operation of the motor under the high-temperature or high-pressure environment can be ensured.

Description

technical field [0001] The present invention relates to the technical field of motor equipment, in particular to a main shaft sealing system for a working motor in a high-temperature or high-pressure environment. Background technique [0002] High temperature or high pressure environment refers to a pure high temperature or high pressure environment, or an environment with both high temperature and high pressure, such as the working environment of downhole motors, deep sea motors and other motors. Motors working in high-temperature or high-pressure environments not only have to withstand the effects of external high temperature and high pressure, but also the influence of external media on the motor cannot be ignored. Under normal conditions, the medium outside this type of motor is a multiphase mixed liquid, including solid phase, liquid phase and gas phase. The internal medium of the motor is usually a thin oil medium. Therefore, how to prevent the external medium at the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/124H02K5/10F16J15/16
CPCF16J15/164H02K5/10H02K5/124H02K2213/09
Inventor 孙立宾林坤李少斌李彬
Owner DONGFANG ELECTRIC MACHINERY
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