CN206555158U - A kind of durable submersible pump - Google Patents

Abstract

The utility model discloses a kind of durable submersible pump, it is related to submersible pump technical field, including motor cylinder, the top chock and step and the armature spindle that is rotatably arranged on top chock and step at motor cylinder two ends are sealingly fitted to respectively, and seal is equipped between the top chock and step, bearing；The step sealing, which is equipped between base and step and base, is provided with through hole A, and base is equipped with base cover, and base cover offers through hole B；Rubbery human body is equipped between the base and base cover, rubbery human body and motor cylinder are internally formed sealing space, solve submersible pump and burnt out because of motor cylinder water shortage, external agency enter motor internal damage bearing and immersible pump because angular contact bearing is damaged and the problem of cause rotor " sweeping thorax " and burn motor.

Description

A kind of durable submersible pump

Technical field

The utility model is related to submersible pump technical field, in particular it relates to a kind of durable submersible pump.

Background technology

QS types water-filling submersible electric pump (QS immersible pumps) is made up of water pump, motor two large divisions, and water pump is located on electric pump Portion is centrifugal structure, and motor is located at electric pump bottom, is Water threephase asynchronous.Water motor stator winding Directly soaked in water with iron core, the features such as good cooling results, output power, efficiency high.Threephase motor is divided into rolling bearing With two kinds of sliding bearing, sliding bearing uses high-quality graphite cannula and stainless steel thrust disc, is respectively subjected to radial direction during electric pump work Power and axial force, sealing ring and sand control cap constitute the sealing device of motor, and the serial electric pump is special due to structure, when using pair Pollution of waterhead is few, therefore is widely used in the discharge of farmland discharging-irrigating, sprinkling irrigation, well water lift, life water intaking, industry and civil buildings Water system, and Hills the occasion such as diversion, the draining of low laying areas.The defect that the pump is present is as follows：(1) due to using Graphite cannula replaces bearing, and the pump can not horizontal work；(2) water inlet of the pump connects end and uses outside framework oil seal, to sewage silt Outside framework oil seal and armature spindle is quickly worn and torn, damage graphite cannula, cause motor " sweeping thorax " to burn out；(3) pump is in reality Repair rate is higher in use, about 20%, causes human and material resources, the waste of resource, and certain influence is also resulted in environmental protection.

The defect of the serial submersible pumps of existing QS is as follows：

1. because the structure of its motor part designs for non-tight, (original motor cylinder two ends use each 2 outside framework oil seals and O Type sealing ring is sealed)：(1) electric pump is there is in the process of running because motor causes in motor at a high speed rotation produces internal pressure Water-filling is forced out motor or because temperature rise causes the phenomenon that water-filling is distributed by thermal expansion in motor, so as to cause motor top line Circle is burned out due to a lack of water cooling；(2) motor upper end is due to using outside framework oil seal, in the electric pump course of work because of water quality reason outside The silt and dirt in portion easily cause the abrasion of outside framework oil seal, and outside dirt causes inner shaft of motor to hold damage into motor.

2. electric pump lower bearing uses angular contact bearing, for multi-pole, Gao Yangcheng electric pump, bearing is special in the process of running It is not to start reaction longitudinal force hydraulic head gravity and its internal water-filling gravity of the moment because of electric pump to bear load more than its axial direction And angular contact bearing is damaged, so as to cause electric pump motor rotor to occur " sweeping thorax " and burn motor.(for example：Former QS series 1 7305AC, its dead load Cor=15.2KN that the lower angular contact bearing of 2.2Kw electric pumps is used).

3. upper bearing (metal) is using 1 deep groove ball bearing, when multistage high-lift single electric pump more than its radial direction in the course of the work because carrying Lotus and cause upper bearing (metal) damage burn motor.Although pump repair rate in actual use has reduced, about 15%, Human and material resources, the waste of resource are caused, certain influence is also resulted in environmental protection.

4. understanding whole nation production QS immersible pump major parts in Xuzhou Pei County and Feng County according to me, I recognizes almost every to each factory Individual factory reprocess pump be all up to a hundred pump it is to be repaired be stored in workshop, ask expert, leader to be investigated.

Utility model content

In order to solve the above technical problems, the utility model provides a kind of durable submersible pump, to reach submersible motor Service life length, non-damageable purpose, solve submersible pump because motor cylinder water shortage and burn out, external agency enter electricity The problem of machine internal damage bearing and immersible pump cause rotor " sweeping thorax " and burn motor because of angular contact bearing damage.

In order to realize above-mentioned technique effect, technical scheme provided by the utility model is：A kind of durable submersible pump, Including motor cylinder, the top chock and step at motor cylinder two ends are sealingly fitted to respectively and top chock is rotatably arranged on With the armature spindle on step, mechanical sealing member is equipped between the top chock and step and armature spindle；It is described Step sealing, which is equipped between base and step and base, is provided with through hole A, and base is equipped with base cover, and base cover is opened Provided with through hole B；Rubbery human body is equipped between the base and base cover, it is empty that rubbery human body is internally formed sealing with motor cylinder Between.

Further, it is equipped with O-ring seal between top chock and step and the motor cylinder.

Further, the seal includes mechanical seal A and the lower bearing being arranged between top chock and armature spindle Mechanical seal B between seat and armature spindle.

Further, the lower end of the step is equipped with lower ball cover, is provided with and pushes away between lower ball cover and armature spindle Power bearing, is provided with deep groove ball bearing between step and armature spindle.

Further, provided with two deep groove ball bearings between the top chock and armature spindle.

Further, in addition to top chock the water inlet for mutually sealing assembling connects, and the water inlet is equipped with water inlet, water inlet Connect and outside framework oil seal is provided between the side of nearly top chock and armature spindle, mechanical seal C is provided between opposite side and armature spindle.

Further, the top connect that intakes is connected with pump head, and the end of pump head, which is provided with delivery port and pump head, to be provided with The impeller mutually assembled with armature spindle.

Further, the snap ring being located above step, the inwall card of snap ring and motor cylinder are provided with the motor cylinder Connect and be equipped with the back-up ring matched with it；Bolt is connected between the back-up ring and base.

Compared to prior art, the beneficial effects of the utility model are：

1st, due to using the design of sealed motor barrel structure, while entering to motor cylinder pressure and thermal expansion in running Row effectively release, makes rubber pneumatic bag deform, it is ensured that the total Water in motor cylinder is not when the internal pressure change of electric inside machine barrel Become, so as to solve the problem of former QS types submersible pump is burnt out because of motor cylinder water shortage, add the service life of motor；

2nd, the both sides up and down that the water inlet of top chock connects are respectively arranged with mechanical seal and outside framework oil seal, prevent in electric pump work Because of water quality reason during work, outside silt and dirt easily causes the abrasion of outside framework oil seal, so as to efficiently solve outside Jie Matter enters the problem of damaging bearing in bearing block, improves the bearing service life of motor internal；

3. the lower bearing inside step employs the mode that thrust bearing is combined with deep groove ball bearing, solve existing Some submersible pumps damage because of the radial and axial confining load born of angular contact bearing and cause rotor " sweeping thorax " and burn The problem of ruining motor.

Brief description of the drawings

Fig. 1 is the overall structure for the durable submersible pump that the utility model is provided.

Embodiment

The utility model is further described in detail with reference to specific embodiment, following word is intended to indicate that The utility model, and unrestricted protection domain of the present utility model.

As shown in figure 1, the utility model can be implemented as follows, a kind of durable submersible pump, including motor cylinder 14th, the top chock 10 and step 20 at 14 two ends of motor cylinder are sealingly fitted to respectively and are rotatably arranged on top chock 10 The iron core stator 12 matched with the armature spindle 13 on step 20, with armature spindle 13, the top chock 10 and lower bearing Seal is equipped between seat 20 and armature spindle 13；The sealing of step 20 is equipped with base 24 and step 20 and bottom Through hole A is provided between seat 24, through hole A is cast on step 20；Provided with O-shaped close between the base 24 and step 20 Seal A21, base 24 is equipped with base cover 25, and base cover 25 offers through hole B, for being breathed freely when rubbery human body 26 is deformed； Rubbery human body 26 is equipped between the base 24 and base cover 25, it is empty that rubbery human body 26 is internally formed sealing with motor cylinder 14 Between, when motor cylinder pressure changes in submersible pump running, rubber pneumatic bag deforms therewith, it is ensured that motor cylinder Total Water in 14 is constant, solves the problem of submersible pump is burnt out because of motor 14 water shortages of cylinder.

O-ring seal B7 and O-shaped sealing are respectively equipped between top chock 10 and step 20 and the motor cylinder 14 Enclose C19, the seal include being arranged on mechanical seal A11 and step 20 between top chock 10 and armature spindle 13 with Mechanical seal B15 between armature spindle 13, it is ensured that sealing is formed inside motor cylinder 14, between base 24 and rubbery human body 26 empty Between.

The lower end of the step 20 is equipped with lower ball cover 23, and lower ball cover 23 is bolted on step 20 bottom, is provided with thrust bearing 22, the thrust bearing 22 is for specially bearing between lower ball cover 23 and armature spindle 13 The special bearing of axial force, is exactly the bearing of the power in the parallel direction of axle, and zanjon is provided between step 20 and armature spindle 13 Ball bearing A16, wherein thrust bearing 22 are combined with deep groove ball bearing A16 prevents bearing from particularly starting wink in the process of running Between be damaged because submersible pump hydraulic head gravity and its internal water-filling gravity bear load more than its axial direction, so as to cause electricity Pump motor rotor occurs " sweeping thorax " and burns motor；Two zanjons are equipped with successively between the top chock 10 and armature spindle 13 Ball bearing B9.

The water inlet for also including mutually sealing assembling with top chock 10 connects 5, and the water inlet connects 5 and is provided with water inlet, and water inlet connects 5 and leaned on Outside framework oil seal 8 is provided between the side of nearly top chock 10 and armature spindle 13, it is close provided with machinery between opposite side and armature spindle 13 Seal C4；The water inlet is connect between 5 and top chock 10 provided with O-ring seal D6 to realize sealing assembling, is prevented in submersible pump Because the silt and dirt outside water quality reason easily cause the abrasion of outside framework oil seal 8 in the course of work, outside dirt is made into motor The damage held into inner shaft of motor.

The top that the water inlet connects 5 is connected with pump head 2, and the end of pump head 2, which is provided with delivery port 1 and pump head 2, to be provided with turning The impeller 3 that sub- axle 13 is mutually assembled；The delivery port 1 is connected with outlet pipeline.

The snap ring 18 for being located at the top of step 20 is provided with the motor cylinder 14, the inwall of motor cylinder 14 is provided with and snap ring 18 necks matched, the neck phase clamping of the inwall of snap ring 18 and motor cylinder 14 and are equipped with the back-up ring 17 matched with it, Back-up ring 17 is located at the top of snap ring 18；Bolt is connected between the back-up ring 17 and base 24, base 24 is locked at down by bolt The end of bearing block 20.

Operation principle of the present utility model is as follows：

Submersible pump using it is preceding filled into motor cylinder 14 clear water or cooling oil (note clear water with QS submersible pumps similarly, Note cooling oil and QY submersible pumps similarly), submersible pump is completely immersed in water, outlet pipeline is connected.Submersible pump connects electricity The armature spindle 13 of motor, which rotates, behind source drives the impeller 3 being arranged on the end of armature spindle 13 to rotate by centrifugal defeated to water progress Send.Internal pressure can be produced because armature spindle 13 rotates at a high speed, while the water or oil that are prefilled with motor also can be with the temperature rises of motor Start thermal expansion, at this moment the water in motor cylinder 14 can be entered by the hole on step 20 (being cast with through hole on step) The lower space of base 24, because the bottom of base 24 is equipped with rubber pneumatic bag 26, rubber pneumatic bag 26 can be produced under the effect of the pressure The shape that changes is so as to absorption pressure.When motor is stopped transport, water or oil recover normal temperature in motor cylinder 14, and rubber pneumatic bag 26 is restored will Pressure and the water back pressure of thermal expansion are to motor cylinder 14, so as to ensure that the total Water in motor cylinder 14 is constant.

Any one skilled in the art can readily occur in change in the technical scope that the utility model is disclosed Change or replace, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with right It is required that described protection domain is defined.

Claims (8)

1. a kind of durable submersible pump, including motor cylinder, top chock and lower axle that motor cylinder two ends are sealingly fitted to respectively Bearing and the armature spindle being rotatably arranged on top chock and step, it is characterised in that the top chock and lower axle Seal is equipped between bearing and bearing；The step sealing, which is equipped between base and step and base, to be provided with Through hole A, base is equipped with base cover, and base cover offers through hole B；Rubbery human body is equipped between the base and base cover, Rubbery human body is internally formed sealing space with motor cylinder.

2. durable submersible pump according to claim 1, it is characterised in that the top chock and step and electricity O-ring seal is equipped between machine barrel.

3. durable submersible pump according to claim 1, it is characterised in that the seal includes being arranged on upper bearing (metal) The mechanical seal B between mechanical seal A and step and armature spindle between seat and armature spindle.

4. durable submersible pump according to claim 1, it is characterised in that the lower end of the step is equipped down Bearing cap, is provided with thrust bearing between lower ball cover and armature spindle, deep groove ball bearing is provided between step and armature spindle.

5. durable submersible pump according to claim 1, it is characterised in that set between the top chock and armature spindle There are two deep groove ball bearings.

6. durable submersible pump according to claim 1, it is characterised in that also including mutually sealing assembling with top chock Water inlet connect, the water inlet is equipped with water inlet, and water inlet is connected between the side of nearly top chock and armature spindle provided with skeleton oil Envelope, is provided with mechanical seal C between opposite side and armature spindle.

7. durable submersible pump according to claim 6, it is characterised in that the top that the water inlet connects is connected with pump Head, the end of pump head is provided with delivery port and pump head provided with the impeller mutually assembled with armature spindle.

8. durable submersible pump according to claim 1, it is characterised in that be provided with the motor cylinder and be located at lower bearing Snap ring above seat, the inwall clamping of snap ring and motor cylinder and is equipped with the back-up ring matched with it；The back-up ring and base it Between be connected with bolt.