CN2862479Y - High temperature oil-submersible electric motor with new heat-dispersing structure - Google Patents

Abstract

A high temperature oil-immersed motor with a novel thermal dispersion structure is disclosed. It mainly solves the shortcomings of poor thermal dispersion for existing oil-immersed pump motor when flow velocity on motor surface is lower than 0.3m/s, and impossible installation of wind deflector when the diameter of slant well or sleeve pipe is too small. It is characterized in that inside the housing (1) of the oil-immersed motor are connected, in sequence, alignment bearing (2), upper thermal dispersion oil cavity (3) equipped with copper sheet (4) for thermal dispersion, motor rotor (12), stator silicon steel sheet (13), bottom guide casing (6) provided with internally installed stator clamp spring (14), joint (9) of the guide casing (8), cylinder-shaped thermal dispersion housing (10) with radiating flange of the lower thermal dispersion oil cavity (16), down-reaching core plug (11) and the down reaching joint (11), impeller blades (7) fixed by keys (21) on motor shaft (5) inside the guide casing (8); the lower end of the impeller blade (7) is disposed inside the guide casing (8); the motor shaft (5) is a hollow shaft, and its bottom shaft hole (19) is a dynamo oil loop head. The thermal dispersion problem for oil-immersed motor is effectively solved, and the service life of the oil-immersed pump motor is prolonged.

Description

A kind of heat sinking structured high temperature submersible electric motor

Technical field:

The utility model relates to a kind of oil exploitation machinery, especially relates to a kind of submersible electric motor with heat sinking structure.

Background technology:

In the oil recovery process of oil field, with the matching used submersible pump motor of oil-submersible centrifugal pump be a kind of device that converts electric energy to mechanical energy of using always.The heat radiation of submersible pump motor is to pump the radial hole that leans on the centrifugal force of rotor rotation generation to force the dynamo oil of motor internal to be opened from motor shaft, the negative pressure that forms in the hollow endoporus of motor shaft makes dynamo oil enter from the lower shaft hole of motor shaft simultaneously, and so just formed an oil circulation process: the gap → lower shaft hole on the lower shaft hole → rotor of motor shaft and the motor shaft between each radial hole → rotor is by above oil circulation process.Dynamo oil is taken away heat from the concentrated heating position of motor, by flowing through the well liquid of motor outer surface, reaches the effect of cooling motor.In general, the effect of this type of cooling has very big relation with the flow velocity that flows through the well liquid on motor surface, generally requires the motor surface velocity to be lower than 0.3m/s as if the motor surface velocity greater than 0.3m/s, then motor temperature will sharply raise, and cause burn-down of electric motor.In practice, if the motor surface velocity may be lower than 0.3m/s, sharply raise for fear of motor temperature, usually all be to add kuppe to solve, if but under the too small situation of inclined shaft or casing diameter, kuppe just can't be installed, and is difficult to carry out thereby cause to produce.In addition, temperature than higher hole condition under motor to the heat radiation the requirement meeting higher.

The utility model content:

In order to overcome the existing submersible pump motor deficiency bad, that kuppe can't be installed under the too small situation of inclined shaft or casing diameter of dispelling the heat when the motor surface velocity is lower than 0.3m/s, the utility model provides a kind of high temperature submersible electric motor with heat sinking structure.This kind motor has radiating efficiency and not influenced by the well flow velocity and the characteristics of good heat dissipation effect.Solve the heat dissipation problem of submersible electric motor effectively, can reduce electric machine temperature rise greatly, improved the running life of submersible electric motor.

The technical solution of the utility model is: this kind heat sinking structured high temperature submersible electric motor, comprise the conventional components such as stator, rotor and motor rotation axis that are positioned at the submersible electric motor casing, unique place is: be connected with alignment bearing in the submersible electric motor casing in turn, the last thermal dispersion oil cavity of radiating copper sheet is housed, shell is led in built-in bottom, lead the joint of shell, flange-cooled cylindrical shape radiating shell and lower contact.Wherein joint and radiating shell are passed in the center of motor shaft, lead on the motor shaft in the shell fixedly impeller, and the impeller lower end places leads in the shell.

The utlity model has following beneficial effect: since take such scheme before have motor to increase by two shoe cream rooms, thereby increased the capacity of dynamo oil in the motor, can more absorb the heat that holds from the motor feels hot position like this.Especially the shoe cream room of going up most joint rotor top is positioned at the main heating position of motor, more helps heat radiation.In addition, two fuel-economizing chambeies have also increased the area of dissipation of motor up and down, process also more convenient.Secondly, impeller can suck the oil of the high-temperature electric machine in the motor in the radiating shell and dispel the heat, and then the low temperature electric machine oil pressure after will dispelling the heat is gone into the core motor beam warp and is got rid of oilhole and get rid of in the motor, absorb the motor heat, circulation so repeatedly, can reach the purpose of motor quick heat radiating, can quicken the mobile of dynamo oil and strengthen area of dissipation, solve the heat dissipation problem of submersible electric machine with oil effectively, can reduce electric machine temperature rise greatly, improve the running life of submersible electric machine with oil, not influenced by the well flow velocity, good heat dissipation effect has prolonged motor useful life, can be widely used in the place of using submersible electric machine with oil.

Description of drawings:

Accompanying drawing 1 is a structure cutaway view of the present utility model.

Among the figure: 1-motor casing, 2-radiating copper sheet, the last thermal dispersion oil cavity of 3-, 4-alignment bearing, the 5-motor shaft, 6-leads shell in the bottom, the 7-impeller, 8-leads shell, the 9-joint, 10-radiating shell, 11-lower contact, 12-rotor, 13-motor stator silicon steel sheet, 14-stator jump ring, 15-protects central siphon, thermal dispersion oil cavity under the 16-, 17-motor down-lead, 18-lower end cap, the 19-lower shaft hole, 20-fuel feeding valve, 21-key.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1, this kind heat sinking structured high temperature submersible electric motor, comprise the conventional structures such as stator, rotor and motor rotation axis that are positioned at submersible electric motor casing 1, its special place as can be seen from the figure at first is that motor shaft 5 is for hollow, the bottom is a lower shaft hole 19, secondly is to connect alignment bearing 2 in submersible electric motor casing 1 successively; The last thermal dispersion oil cavity 3 of radiating copper sheet 4 is housed, rotor 12, stator silicon steel sheet 13, stator jump ring 14, connect successively and protect central siphon 15, connect built-in bottom and lead shell 6 and lead the joint 9 of shell 8, thermal dispersion oil cavity 16 and flange-cooled cylindrical shape radiating shell 10 and lower contact 6 down, motor down-lead 17, joint 9 and radiating shell 10 are passed in the center of motor shaft 5; Lead on the motor shaft 5 in the shell 6 by the fixing impeller 7 of key 21 bottom, impeller 7 lower ends place leads in the shell 8, and impeller 7 and lead between the shell 8 and to be matched in clearance is by threaded clamping sleeves in the joint 9, to lead shell 8 and lead shell 6 with the bottom and compress, avoid because of the motor shaft 5 long sharp poundings that when impeller 7 rotates, cause; Impeller 7 can suck the oil of the high-temperature electric machine in the submersible electric motor casing 1 radiating shell 10 and go up in the heat radiation chamber 3 and dispel the heat, and then the low temperature electric machine oil after will dispelling the heat is pressed into core motor axle 5 by lower shaft hole 19 and enters in the motor, absorb the motor heat, circulation so repeatedly, especially go up the position of thermal dispersion oil cavity and close on the main heating position of motor, more help the absorption of heat and distribute, can reach the purpose of motor quick heat radiating.Because impeller 7 forces to quicken flowing of dynamo oil, solve the heat dissipation problem of submersible electric machine with oil effectively, can reduce the temperature rise of motor greatly, improve the running life of submersible electric machine with oil, not influenced by the well flow velocity, good heat dissipation effect has prolonged useful life of motor, can be widely used in the place of using submersible electric motor.

Claims (1)

1, a kind of heat sinking structured high temperature submersible electric motor, comprise the stator that is positioned at submersible electric motor casing (1), rotor and motor rotation axis, it is characterized in that: be connected with alignment bearing (2) in the submersible electric motor casing (1) in turn, the last thermal dispersion oil cavity (3) of radiating copper sheet (4) is housed, rotor (12), motor stator silicon steel sheet (13), stator jump ring (14), protect central siphon (15), shell (6) is led in built-in bottom, lead the joint (9) of shell (8), following thermal dispersion oil cavity (16) and flange-cooled cylindrical shape radiating shell (10), motor afterbody lead-in wire (17), and lower contact (11) and fuel feeding valve (20) and lower end cap (18), wherein, joint (9) and radiating shell (10) are passed in the center of motor shaft (5), the motor shaft (5) of leading in the shell (8) is gone up with key (21), fixing impeller (7), impeller (7) lower end places leads in the shell (8), motor shaft is the hollow shaft that has central shaft hole and side opening, lower shaft hole (19) is positioned at its bottom, is the dynamo oil loop head.