CN2307132Y

CN2307132Y - Cavity pressure balanced submersible pump

Info

Publication number: CN2307132Y
Application number: CN 97205319
Authority: CN
Inventors: 顾炳然
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-24
Filing date: 1997-02-24
Publication date: 1999-02-10
Anticipated expiration: 2007-02-24

Abstract

The utility model relates to a single-phase electric submersible pump device, particularly a cavity pressure balanced submersible pump which is composed of a pump body, an impeller, a motor, a stator, an impeller, a bearing, etc. The side face of a pump chamber at one end of a water outlet is provided with a water-out subdividing pipe which is opened inward; the water-out subdividing pipe is connected with a thin guide pipe which is communicated with a sealing motor cavity. The upper and the lower parts of the utility model form a communicating vessel with same water pressure; especially, the motor has favorable cooling effect; the utility model has the advantages of high power factor and efficiency and high delivery lift; the bearing has long service life.

Description

The balanced type submersible pump is pressed in the chamber

The utility model relates to a kind of submersible pump unit of single-phase electricity, and the balanced type submersible pump is pressed in the chamber that particularly a kind of lift is high.

China's utility model patent single-phase capacitor running coil immersion type submersible pump, applying date 1991.4.12, day for announcing 1992.7.1, CN2108812U, this technology partly is made up of the water pump of the electrode of base plate, pump case, rotor shaft, stator iron core, rotor iron core, stator coil, inlet segment and capacitor part and inlet segment, filter screen, impeller, cover plate etc., though this submersible pump power factor and efficient height, lift height, but because of the axle of submersible pump passes big to the axial force of motor, the bearing at fragile rotor axis of electric two end part can not run well submersible pump.

The purpose of this utility model is at above-mentioned the deficiencies in the prior art, and it is zero that a kind of force value algebraic sum that produces at the rotor shaft two ends is provided, and the balanced type submersible pump is pressed in the chamber that its end bearing is not produced thrust.

It is to realize like this that the technological scheme of balanced type submersible pump is pressed in the utility model chamber.

The balanced type submersible pump is pressed in a kind of chamber that is made of the pump housing, impeller, water intake, water outlet, motor, stator, rotor, bearing, it is characterized in that the water outlet segmentation pipe that is provided with to inner opening in water outlet one end pump chamber side is connected with fine duct, fine duct is connected with the motor cavity of sealing, high-pressure hydraulic in the water pump enters in the motor cavity by fine duct, hydraulic pressure in the motor cavity changes along with the variation of hydraulic pressure in the water pump chamber, reach in two chambeies and to flatten weighing apparatus, eliminated because of the axial force that pressure produced in the water pump and damaged motor bearings.

It is single phase poaer supply that the characteristics of balanced type submersible pump are pressed in the utility model chamber, stator coil and rotor immerse in the water, so good cooling results, can save Sealing and centrifugal switch, power factor and efficient height, the pump head height is useful for aspect pumps water such as agricultural, industrial and mineral, building site, underground installation and family.

Balanced type submersible pump structural representation is pressed in Fig. 1 chamber.

Provide following embodiment in conjunction with the accompanying drawings.

Fig. 1 discloses the chamber and has pressed balanced type submersible pump structure, water pump loam cake middle part is provided with water outlet 1, water pump loam cake and pump casing 5 usefulness screws 2 are fixing, the pump housing is triplex chamber 7 structures, be provided with impeller 6 in every grade of pump chamber 7, impeller shaft and motor output shaft are the elongated axle 16 of one, the triplex chamber is spaced apart water pump level spacing wall 8, middle part, triplex chamber is provided with water intake 9, water pump level spacing wall 8 outer ends and pump casing 5 are connected for retaining screw 10, it below the triplex chamber water-inlet cavity 11, being motor upper cover 14 below the pump housing, is motor cavity 15 below the motor upper cover, and motor cavity adopts plate muscle 22 to be connected with the pump housing, plate muscle gap is an intake tunnel, and water can directly enter in the triplex chamber from middle part water intake 9.Be provided with motor, rotor 17, stator 18, rotor shaft 16 in the motor cavity, the rotor shaft underpart is provided with bearing 19, and bearing 19 is fixed on the bearing bracket stand 20 on the motor lower end cap 21; Motor lower end cap and electric machine casing are screwed, motor output end is provided with the seal arrangement 23 of motor closed loop and bearing structure, this part is prior art, the sidewall of the close water outlet 1 of first-stage pump body is provided with the water intake 3 to inner opening, be communicated with fine duct 4, when casting, pump walls at different levels respectively are cast with fine duct in same position, each fine duct correspondence is joined and is formed a thin siphunculus during assembling, then form a fine duct 4, on the close pump wall of motor one-level, be provided with water intake 13 towards motor cavity 15, be connected with motor water intake 13 by aqueduct 12, when motor rotates, three grades of impellers of water pump 6 rotate synchronously in company with motor shaft, water pump can draw water, because hydraulic pressure increases in the water pump chamber, with water by water intake 3 through fine duct 4, aqueduct 12, motor water intake 13 enters in the motor casing, motor is originally as encrypting seal apparatus, water electrode is leaked less, facilitate in pump chamber 7 and the motor cavity 15 hydraulic pressure identical, the water in the water pump is identical to the pressure of axle with water in the motor to the pressure of axle, thereby overcome because of hydraulic pressure in the pump causes the longitudinal force of axle generation the Driving force of motor one step bearing is damaged bearing.

Claims

1. the balanced type submersible pump is pressed in a chamber that is made of the pump housing, impeller, water intake, water outlet, motor, stator, rotor, bearing, it is characterized in that the water outlet segmentation pipe that is provided with to inner opening in water outlet one end pump chamber side is connected with fine duct, fine duct is connected with the motor cavity of sealing.