CN1170064C

CN1170064C - Sand-discharging submerged pump

Info

Publication number: CN1170064C
Application number: CNB991135180A
Authority: CN
Inventors: 王庆武
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-11
Filing date: 1999-03-11
Publication date: 2004-10-06
Anticipated expiration: 2019-03-11
Also published as: CN1266948A

Abstract

The present invention relates to a sand discharging submersible pump. The present invention has the technical scheme that a water storing tank is arranged outside a bearing chamber at a bottom end cover of a dry type motor and is provided with an upper opening and a through hole of a hollow cavity which leads to the position between a mechanical seal and a lower bearing. An oil storing tank is arranged above the bearing, and an oil dripping hole is arranged on the bottom of the oil storing tank. The present invention has the advantages that the water storing tank can store the water which enters the motor, when the lean oil of the bearing heats, the oil storing tank can drip oil from the oil dripping hole to make the temperature rise of the bearing normal.

Description

Sand-discharging submerged pump

Technical field

The present invention relates to a kind of sand-discharging submerged pump, be particularly useful for carrying the explosion-proof sand-discharging submerged pump that contains solid abrasive particles in the liquid.

Background technique

Existing submersible pump is in order to prevent the water inlet of dry type motor, and it is reliable to pursue mechanical seal " definitely ", and the technical measures of taking also only are the face pressures that increases mechanical seal.In the dry type motor, the bearing grease heat loss is serious, and more outstanding with the motor upper bearing (metal).Therefore, behind the turn on pump, mechanical seal and bearing generate heat at first in a large number.After the termination of pumping, the submersible pump that is parked under water is cooled very soon.Because " definitely " sealing does not exist, and leakage is an objective reality relatively.So this heating that replaces of motor, the caused motor room of cooling internal pressure increase, reduce, the alternately leakage that will inevitably make mechanical seal produce outside leakage of oil, inwardly leak.This leakage is used the later stage at submersible pump, and electrical machine insulation is sharply worsened.When the submersible pump conveying contained husky muddy water, the quantity of this leakage can obviously increase at short notice, finally makes mechanical seal ineffective early.When submersible pump power is bigger, when the motor diameter of axle was thick, the leakage that above-mentioned heating causes was quite obvious.Therefore, the difficult problem of submersible pump " motor is burnt in the motor water inlet ", particularly the difficult problem of " motor is burnt in the husky water inlet of submersible pump spoil disposal " is perplexing people for a long time, limit the renewal and the development of submersible pump, had to rest on the small-sized submersible pump stage that only can discharge soft sewage at present.

Summary of the invention

The purpose of this invention is to provide a kind of explosion-proof sand-discharging submerged pump, it can overcome above-mentioned shortcoming and defect, reduce the machinery heating of motor, make the electromechanics sealing outwards lack leakage of oil, inwardly leak less, particularly when mechanical seal was inwardly leaked, the self structure of motor also can make the water that enters in the motor room, since you are here, you may as well stay and make the best of it.

The technical solution adopted in the present invention is: the water reservoir 11 that is located at lower bearing room 8 outsides of dry type motor 24 lower end caps 4 has the upper shed 18 that directly communicates with motor room 25.Water reservoir 11 has the through hole 9 that leads to transition chamber 26.Said transition chamber 26 is to coexist within mechanical seal chamber 7 and the shell 6 that lower bearing room 8 is connected, and the cavity between mechanical seal and bearing.Water reservoir 11 has with the pump housing 14 is discharged and also covers on the contacted shell 32 of current within the case 23.Perhaps described water reservoir 11 have will pump drainage with submersible pump the contacted shell 32 in water source.The outer surface 30 of the shell 6 that lower bearing room 8, transition chamber 26 and Room 7 three, mechanical seal chamber are connected contacts with the current that also cover within the case 23 that the pump housing 14 is discharged.

Be located in the upper bearing (metal) chamber 27 of motor 24 upper end caps 1 central authorities, and be placed at the end of oil storage pool 19 of the bearing top in the upper bearing (metal) chamber 27 and have oil dripping hole 20.Be located in the lower bearing room 8 of motor 24 lower end caps 4 central authorities, and be placed at the end of oil storage pool 3 of the bearing top in the lower bearing room 8 and have oil dripping hole 10.

Water reservoir 11 has under shed 17.29 sealings of under shed 17 usefulness safety relief films.

The opening inwall of the upper shed 18 of water reservoir 11 is cylndrical surface.In upper shed 18, lay one group of flame proof round bush 28.Said flame proof round bush 28 is pipes one by one that diameter successively decreases, and each pipe is according to size order, one in cover nestable in upper shed 18, and a plunger 33 is put in its central position.

The present invention adopts after the above technological scheme, and the upper and lower bearing of its motor through the oil dripping hole fuel feeding, make bearing that lubricating grease heat loss phenomenon no longer take place, thereby bearing temperature rise is normal with oil storage pool.Require mechanical seal not leak owing within reason, can suitably reduce face pressure, make mechanical seal reduce heating.In addition, the shell surface 30 of the shell 6 that mechanical seal chamber 7, transition chamber 26 and lower bearing room 8 are connected contacts with water, can in time dispel the heat.The shell 32 of water reservoir 11 contact with water can guarantee condensation water after entering water reservoir 11, again can because of the motor feels hot once more the evaporation.Simultaneously, shell 32 is actual is to have increased the motor radiating surface area.So the temperature rise fluctuation in the motor room is milder, also therefore and mild, this just can make mechanical seal outwards lack leakage of oil to the pressure surge in the motor room, inwardly leaks less.Even mechanical seal is being leaked in the motor room, had after the water reservoir 11, the water of coming in has just had the part of taking shelter, and can not run helter-skelter or flash to permeate all corners of motor room of water vapor.Particularly had after the through hole 9 that leads to transition chamber 26, can make from the inside water that advances that leaks of mechanical seal and before not reaching lower bearing, just taken in water reservoir 11, or else can resemble the lubricating grease that washes away lower bearing the existing submersible pump, make the oil-poor heating of bearing and damage rapidly.Like this, contain husky muddy water and enter motor, can live together peacefully in the same old way although water is arranged even have.When the long-pending full water reservoir 11 of water, as long as in time emit, submersible pump can be worked as usual.Once the example and the report that had the motor for submerged pump blast to hurt sb.'s feelings.In time break when set safety relief film 29 can be blasted in motor on the under shed 17, and the motor explosive accident can not take place again.If it is explosion-proof that motor requires, set flame proof round bush 28 can satisfy requirement of explosion proof, can pass through the 29 timely pressure releases of safety relief film again, prevents the motor blast.At this moment, projects of the present invention's explosion-proof sand-discharging submerged pump that will provide can realize.

The advantage of sand-discharging submerged pump of the present invention is simple in structure, and is easy to manufacture, satisfactory for result, can the row of drawing water husky, and submersible pump is maximized.

Description of drawings

Fig. 1 is a kind of embodiment's of a draining submersible pump of the present invention generalized section.

Embodiment

1 couple of the present invention is further described below in conjunction with accompanying drawing.

Among Fig. 1, sand-discharging submerged pump comprises the pump housing 14, pump shaft 16, impeller 15 and dry type motor 24.Its dry type motor 24 is above the pump housing 14.The lower cover plate 5 of mechanical seal chamber 7 filter screen 34 with upper cover plate 22, the pump housing flange together support of the pump housing 14 after the flange in the bottom of case 23 extends.Pump housing suction port up.The case 23 that is covering pump housing outlet pipe 33 connection motors 24 outsides and the ring cavity 35 of motor 24 compositions.In Fig. 1, the oil storage pool 19 in motor upper cover 1 bearing chamber 27, it is placed in the bearing top in the bearing chamber 27, has oil dripping hole 20 on its end.Oil storage pool 3 in lower end cap 4 bearing chambers 8, it is placed in the bearing top in the bearing chamber 8, has oil dripping hole 10 on its end.The water reservoir 11 in motor lower end cap 4 lower bearing room 8 outsides has the upper shed 18 that directly communicates with motor room 25, and the water that " dewfall " gutters down in the motor can flow into water reservoir 11.In shell 6, the cavity between mechanical seal chamber 7 and lower bearing room 8 is a transition chamber 26.Water reservoir 11 has the through hole 9 that leads to transition chamber 26.When mechanical seal was inwardly leaked, the water that is leaked was into just taken in water reservoir 11 before not arriving lower bearing.There is case 23 the motor outside, and the shell 32 of water reservoir 11 contacts with water reservoir water outward, and therefore, the water that has entered water reservoir can not evaporate in motor again, has increased the motor radiating area simultaneously yet.The outer surface 30 of the shell 6 that lower bearing room 8, transition chamber 26 and mechanical seal chamber are connected contacts with the current that the pump housing in the case 23 is discharged, and makes this heating concentrate part in time to dispel the heat.Water reservoir 11 has under shed 17, and the safety relief film 29 of under shed 17 sealing usefulness is rubber plates.Putting one group of flame proof round bush 28 in water reservoir 11 upper sheds 18, these flame proof round bushes 28 are cylinders one by one that diameter successively decreases, their long 40mm, and wall thickness 1.5-3mm, the central position is stopped up with the plunger 33 of a diameter 10mm.Their matching gap is generally 0.4mm can be effectively explosion-proof.

Claims

1. sand-discharging submerged pump, it comprises the pump housing (14), pump shaft (16), impeller (15) and dry type motor (24), its dry type motor (24) is in the top of the pump housing (14), dry type motor (24) comprises upper end cap (1), lower end cap (4), rotor (21) in casing (2) and the casing (2), in motor room (25), upper bearing (metal) chamber (27) is located at the central authorities of upper end cap (1), lower bearing room (8) is located at the central authorities of lower end cap (4), be provided with the mechanical seal chamber (7) of motor shaft below lower bearing room (8), the water reservoir (11) that it is characterized in that being located at lower bearing room (8) outside of dry type motor (24) lower end cap (4) has the upper shed (18) that directly communicates with motor room (25).

2. sand-discharging submerged pump as claimed in claim 1, it is characterized in that described water reservoir (11) has the through hole (9) that leads to transition chamber (26), said transition chamber (26) is to coexist within mechanical seal chamber (7) and the shell (6) that lower bearing room (8) is connected, and the cavity between mechanical seal and bearing.

3. sand-discharging submerged pump as claimed in claim 1, it is characterized in that described water reservoir (11) has with the pump housing (14) is discharged also covers on the contacted shell of current (32) within the case (23), perhaps described water reservoir (11) have will pump drainage with submersible pump the contacted shell in water source (32).

4. sand-discharging submerged pump as claimed in claim 1 is characterized in that the outer surface (30) of the shell (6) that described lower bearing room (8), transition chamber (26) and Room (7) three, mechanical seal chamber are connected contacts with the current that also cover within the case (23) that the pump housing (14) is discharged.

5. sand-discharging submerged pump as claimed in claim 1 is characterized in that being located in the upper bearing (metal) chamber (27) of motor (24) upper end cap (1) central authorities, and is placed at the end of oil storage pool (19) of the bearing top in the upper bearing (metal) chamber (27) and has oil dripping hole (20).

6. sand-discharging submerged pump as claimed in claim 1 is characterized in that being located in the lower bearing room (8) of motor (24) lower end cap (4) central authorities, and is placed at the end of oil storage pool (3) of the bearing top in the lower bearing room (8) and has oil dripping hole (10).

7. as claim 1,2,3,4,5 or 6 described sand-discharging submerged pumps, it is characterized in that described water reservoir (11) has under shed (17), under shed (17) seals with safety relief film (29).

8. as claim 1,2,3,4,5 or 6 described sand-discharging submerged pumps, the opening inwall that it is characterized in that the upper shed (18) of described water reservoir (11) is the cylndrical surface, in upper shed (18), lay one group of flame proof round bush (28), said flame proof round bush (28) is the pipe one by one that diameter successively decreases, each pipe is according to size order, one nestable in upper shed (18) of a cover, a plunger (33) is put in its central position.

9. as claim 1,2,3,4,5 or 6 described sand-discharging submerged pumps, it is characterized in that described water reservoir (11) has under shed (17), under shed (17) seals with safety relief film (29), the opening inwall of the upper shed (18) of water reservoir (11) is the cylndrical surface, in upper shed (18), lay one group of flame proof round bush (28), said flame proof round bush (28) is the pipe one by one that diameter successively decreases, each pipe is according to size order, one nestable in upper shed (18) of a cover, a plunger (33) is put in its central position.