CN2895816Y

CN2895816Y - Up-machine down-pump type single-stage double-suction double-volute submersible electric pump

Info

Publication number: CN2895816Y
Application number: CNU2005201404865U
Authority: CN
Inventors: 邓悌康; 戴元安; 胡薇; 李
Original assignee: HEFEI SANYI JIANGHAI PUMP INDUSTRY Co Ltd
Current assignee: Hefei Hengda Jianghai Pump Co Ltd
Priority date: 2005-12-27
Filing date: 2005-12-27
Publication date: 2007-05-02
Anticipated expiration: 2015-12-27

Abstract

The utility model relates to an up-machine down-pump single-stage double-suction double-volute submersible electric pump. The problems which new structure pump need to solve are as follows: reduce the electric pump work well depth, save the civil engineering cost, eliminate clean water leakage in the electrical motor. The present utility model is characterized in that: the single-stage double-suction double-volute submersible electric pump is arranged at the bottom, a submersible electrical motor is arranged at the top; two mechanical sealing lines are arranged at the joint between the output shaft of a submersible motor and the pump shaft of the single-stage double-suction double-volute submersible electric pump; two clean water pipe throughout the motor inner are arranged on the top of the submersible electric motor, on which a low water-level sensor and a high water-level sensor are also arranged; more than two tangential incline waterways are evenly distributed on the radial sliding board of the submersible motor. The utility model improves the existing submersible electric pump, uses the up-machine down-pump structure form. And the depth of work well is only more than the axial length of single-stage double-suction double-volute submersible electric pump, which can greatly reduce the civil engineering cost when the present utility model is adopted.

Description

Up-machine down-pump type single-stage double-suction double volute Submerged Motor Pumps

Technical field

The utility model relates to single-stage double-suction double volute Submerged Motor Pumps.

Background technique

Traditional Water Submerged Motor Pumps, its submersible electric motor places the below of water pump.The submersible electric motor output shaft makes progress, thereby can prevent that the motor interior water-filling from spilling from the motive sealing of its rotatingshaft.If instead motor output shaft is downward, then its inner water-filling easily leaks, and has destroyed the basic operating conditions of motor cooling and water lubriucated bearing, can produce the phenomenon that burns out the motor winding and wear and tear water lubriucated bearing fast.Because this key problem in technology is not broken through as yet, therefore, existing Water Submerged Motor Pumps all is the structural configuration that goes up machine formula under the pump.Two big shortcomings on using, engineering are arranged: the one, and, pump in order to satisfy the reasonable working condition of water pump, must increase the depth of immersion of electric pump above motor; Centering, large-scale electric underwater pump, the degree of depth that is increased are 10-12 rice, have increased engineering cost, and, can not draining arrive than low water level, can not satisfy the specific operating conditions that must finish the draining task; As the mine emergency drainage, water level must be dropped to and to advance the people, advance the work that equipment just can recover the production in mine.The 2nd,, the clear water that motor interior is filled with, in when work because the heat that loss produced of motor, its inner water is expanded and volume increases, pressure increases, water in the motor is compelled to extrude each sealing surface of motor, particularly motive sealing place, therefore, in the bottom of motor, generally all be provided with the telescopic adjusting capsule of the rubber system of the inside and outside differential water pressures of balance; Because frequent compensation is flexible, easily ftracture, in case cracking, the clear water in the motor leaks outside, and will burn motor.

Summary of the invention

The purpose of this utility model is: a kind of up-machine down-pump type single-stage double-suction double volute Submerged Motor Pumps that clear water does not leak outside in the electric pump active well degree of depth, saving civil works expense, the motor that reduces is provided.

Concrete architecture advances technological scheme is as follows:

Up-machine down-pump type single-stage double-suction double volute Submerged Motor Pumps, the Water submersible electric motor and the double suction double volute submersible pump that comprise axial connection, and between the up-thrust bearing of the submersible electric motor on the top, joint of the pump shaft 7 of the output shaft of submersible electric motor 17 and double suction double volute submersible pump and the lower thrust-bearing slide plate 16 is arranged, it is characterized in that:

A, state single-stage double-suction double volute submersible pump and be positioned at the bottom, submersible electric motor is positioned at top;

The joint of the pump shaft 7 of the output shaft of B, submersible electric motor 17 and single-stage double-suction double volute submersible pump is provided with twice mechanical seal 13;

The top of C, submersible electric motor 17 is provided with two clear water water pipes 20 that connect motor interior;

Be provided with low water level sensor 18 and high water level sensor 19 in the cavity at D, submersible electric motor 17 tops;

The footpath of the slide plate 16 in the E, submersible electric motor 17 uniform the tangential tiltedly water channel more than two that makes progress, and a tangential tiltedly port of water channel is positioned on the circumferential surface of slide plate 16, and the another port is positioned on the axial surface adjacent with up-thrust bearing.

Useful technique effect of the present utility model is:

1, the utility model passes through the improvement to existing Submerged Motor Pumps, pump structure form under the machine in the employing, and in the use, the active well degree of depth needs only the axial length greater than single-stage double-suction double volute submersible pump, greatly reduces the civil works expense in the use.

2, in the cavity at motor top, be provided with high and low level sensor, can realize when high water level sensor is reported to the police, starting the valve of external moisturizing pipeline at once, in motor, mend clear water by water injecting pipe, when low water level sensor is reported to the police, stop this machine work at once; Guaranteed work safety.

3, two clear water water injecting pipes are set at the submersible electric motor top, have cancelled the adjusting capsule structure of existing submersible electric motor, effectively prevented the generation of leakage accident.On the other hand, in order to enlarge the Applicable scope of electric pump, can extract underground high-temperature-hot-water to the draining environment.When extracting hot water, depend merely on the water cooling of flowing through from motor surfaces, its heat dissipation potential is inadequate, at this moment, pressure of two ventilating water pipes pours into normal temperature cold water, the hot water that has generated heat in discharge motor, the function that has realized forcing cooling makes the normal temperature Submerged Motor Pumps of this device become the hot water Submerged Motor Pumps that can extract geothermal water.

4, by improvement, tangential inclined hole is set on the slide plate promptly, makes the clear water in the motor form hydrodynamic force, satisfy hydronic needs, guaranteed the normal cooling needs of motor Water submersible electric motor slide plate.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is a motor interior structure enlarged view,

Fig. 3 be the K of Fig. 2 to view,

Fig. 4 is the A-A sectional view of Fig. 2.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Up-machine down-pump type single-stage double-suction double volute Submerged Motor Pumps, the Water submersible electric motor and the single-stage double-suction double volute submersible pump that comprise axial connection, and between the up-thrust bearing of the submersible electric motor on the top, joint of the pump shaft 7 of the output shaft of submersible electric motor 17 and single-stage double-suction double volute submersible pump and the lower thrust-bearing slide plate 16 is arranged.

By the bottom, single-stage double-suction double volute submersible pump position that double volute 3 and double-entry impeller 4 constitute, submersible electric motor 17 is positioned at top, and axially connects, and sees Fig. 1.

Twice mechanical seal 13 is installed on the output shaft of submersible electric motor 17;

The top of submersible electric motor 17 is equipped with two clear water water pipes 20 that connect motor interior;

Low water level sensor 18 and high water level sensor 19 are installed in the cavity at submersible electric motor 17 tops;

The footpath of the slide plate 16 in the submersible electric motor 17 uniform four tangential tiltedly water channels 11 that make progress, and four tangential tiltedly ports of water channels are positioned on the slide plate circumferential surface, another port are positioned on the axial surface adjacent with up-thrust bearing 14.

Its working principle is: the single-stage double-suction double volute submersible pump of bottom, its radial section are the two scroll casing shape runners that are symmetrically distributed with shaft axis, and two symmetry outlets are arranged vertically; Water enters double-entry impeller 4 from suction body 1 water intake and suction body 8 water intakes that spue through double volute 3; Water symmetry after impeller 4 boosts enter two symmetrical exocoels of bearing bracket 6 along two scroll casing shape runner directions, enter the two symmetrical high chambeies that suck the body 8 that spues again, merge into an outlet; Enter diffuser 10 and motor then and cross the annular space (water can fully cool off motor like this) that fluid 12 forms, after the outlet of liquid shrinkable 21 and the pipeline discharge that links with it.Submersible pump constitutes two strutbeams by pump bearing on the compounded rubber 2 and following pump bearing 5, has increased the rigidity when impeller 4, pump shaft 7 and bearing arrangement move; Suck the body 8 turnover water cavities that spue because of the leakage that pressure reduction produced if orifice sleeve 9 reduces, thereby improved the working efficiency of pump.

Because impeller 4 two suction symmetries and double volute 3 radial symmetric, axial hydraulic thrust that produces during work and hydraulic thrust equal and opposite in direction radially, direction is opposite, and it is zero making a concerted effort; 14,15 deadweights of bearing motor rotor and pump rotor of the upper and lower thrust-bearing of motor, last pump bearing 2, following pump bearing 5 then are not subjected to radial force substantially, the load that this just greatly reduces motor up-thrust bearing 14, lower thrust-bearing 15 and goes up pump bearing 2, following pump bearing 5, fundamentally improve the Submerged Motor Pumps operational reliability, prolonged the electric pump bearing life.

Claims

1, up-machine down-pump type single-stage double-suction double volute Submerged Motor Pumps, the Water submersible electric motor and the double suction double volute submersible pump that comprise axial connection, and between the up-thrust bearing of the submersible electric motor on the top, joint of the pump shaft (7) of the output shaft of submersible electric motor (17) and double suction double volute submersible pump and the lower thrust-bearing slide plate (16) is arranged, it is characterized in that:

A, state single-stage double-suction double volute submersible pump and be positioned at the bottom, submersible electric motor is positioned at top, and axially connects;

The joint of the pump shaft (7) of the output shaft of B, submersible electric motor (17) and single-stage double-suction double volute submersible pump is provided with twice mechanical seal (13);

The top of C, submersible electric motor (17) is provided with two clear water water pipes (20) that connect motor interior;

Be provided with low water level sensor (18) and high water level sensor (19) in the cavity at D, submersible electric motor (17) top;

The footpath of the slide plate (16) in the E, submersible electric motor (17) uniform the tangential tiltedly water channel more than two that makes progress, and a tangential tiltedly port of water channel is positioned on the circumferential surface of slide plate (16), and the another port is positioned on the axial surface adjacent with up-thrust bearing.