CN207212734U

CN207212734U - A kind of anti-lock self-lubricating easy care centrifugal pump

Info

Publication number: CN207212734U
Application number: CN201721071248.2U
Authority: CN
Inventors: 刘林好
Original assignee: Qingdao Only Branch Pump Industry Co Ltd
Current assignee: Weike Dalian Pump Co ltd
Priority date: 2016-08-29
Filing date: 2017-08-25
Publication date: 2018-04-10
Anticipated expiration: 2027-08-25
Also published as: CN106194839A; CN107420346A; CN107420346B

Abstract

Centrifugal pump field is the utility model is related to, especially a kind of anti-lock self-lubricating easy care centrifugal pump.It includes：Drive shaft, mechanical seal, middle valve jacket, pump cover, the pump housing, fore bearing, rear bearing assembly and impeller.Bearing assembly is mainly made up of rear bearing block, rear bearing, forward thrust disk, thrust disc seat, back pressure disk and thrust disc stationary ring afterwards.It is external using mechanical seal, maintenance time can be greatly reduced, it is low to maintenance personal's technical requirements, bearing service life is greatly extended, adds the stability of pump, greatly reduce and failed caused by pump shakes, all bearings do not need additional lubrication, and dual-gripper has prevented the locking caused by major axis deflection deformation of traditional cantilever pump, and rear bearing assembly individually bears the both direction power of left and right axial direction, front and back bearings Simple detachable designs, and disassembly efficiency is high.

Description

A kind of anti-lock self-lubricating easy care centrifugal pump

Technical field

Centrifugal pump field is the utility model is related to, especially a kind of anti-lock self-lubricating easy care centrifugal pump.

Background technology

Centrifugal pump is widely used in every field, such as oil refining, Aero-Space, desalinization, electricity for a long time Factory, chemical fertilizer, food processing, medicine, field irrigation, urban water supply, fire-fighting etc., it is that most widely used move sets in the world at present It is one of standby, the sum more than 80% of all dynamic equipment is accounted in oil refining industry centrifugal pump according to statistics, and hold and inhale cantilever pump in number More than 70% share of centrifugal pump industry is account for again in amount, how to allow centrifugal pump easy to maintenanceization, practical is each factory one The target directly pursued, the field that the utility model is directed to are exactly novel end suction centrifugal pump.

Applicant is in the line of centrifugal pump onsite application one for a long time, it is maximum in the daily use of centrifugal pump the problem of be also most In terms of the subject matter easily occurred has following three：

First is mechanical seal problem, and the mechanical seal 21 seen in Fig. 1, such as mechanical seal crush, leak, and due to A series of other Problem of Failure caused by dielectric viscosity and temperature and cleannes etc..

Second is bearing problem, the rear deep groove ball bearing 12 and preceding deep groove ball bearing 17 seen in Fig. 1, is mainly manifested in bearing Casing causes bearing housing to be intake from oil leak at axle and bearing gland, machine envelope damage, bearing damage etc..

3rd problem is rotor locking problem：Mainly due to rotor eccentricity and centering problem so that choma or its He contacts with each other stuck (see the choma 3,4 in Fig. 1) the dynamic of small microgap with quiet part, causes pump rotor not rotate, so as to Motor overload is caused to burn.As shown in figure 4, conventional end sucking pump is cantilever design, because stress point holds distant off axis, can cause Axle is because amount of deflection is bent, because the normal clearance between choma only has 0.2~0.5mm, once because radial load causes shaft deflection to bend, Locking just occurs.

If above three problem can be solved smoothly, then the accident rate of centrifugal pump will undoubtedly be greatly prolonged, to use Retrieve huge economic losses in side.

In addition, cantilever centrifugal pump is inhaled when occurring one in above three problem in traditional end, it is just necessary Tear pump maintenance open, a line operator at many scenes has no ability to that centrifugal pump is carried out to tear pump open at all, and contact certainly will be needed to produce Manufacturer causes manufacturing schedule to be delayed, causes huge economic loss for various reasons to Site Service.

Referring specifically to such as Fig. 1 be conventional end suction centrifugal pump profile, pump group mainly by the pump housing 1, impeller 2, drive shaft 20, Mechanical seal 21, bearing housing 9, rear deep groove ball bearing 12 and preceding deep groove ball bearing 17 etc. form.

When needing to change mechanical seal 21 or rear deep groove ball bearing 12 and preceding deep groove ball bearing 17, operator needs elder generation Unload the pump cover bolt 6 of connection pump cover 5 and the pump housing 1 and then unload the miscellaneous part in addition to the pump housing 1, in the process, because It is rapid wear precise part for mechanical seal 21, often damages, leakage caused by machine envelope damage can enters the bearing housing of rear end Cause bearing failure in body.

Once there is machine envelope damage in traditional end suction centrifugal pump, it is necessary to removes whole pump to replace, first has to Lay down pump cover bolt 6 to separate the miscellaneous part in addition to the pump housing, as shown in Fig. 2 then taking impeller nut 23 and impeller 2 Under, bolt 7 is laid down afterwards, pump cover 5 and bearing bracket stand 8 are separated, and removes oil sealing 19 and bearing gland 18 and then removal rear pressing cover 13 On bolt, axle is removed together with rear deep groove ball bearing 12 from rear end, now side can remove mechanical seal 21, rear zanjon Ball bearing 12 and preceding deep groove ball bearing 17 (see Fig. 3), replacement finish after except need assemble successively in order, precision assembling and There are very high technical requirements in centering problem to operator, this just causes very big difficulty, amateur training to onsite application person Instruction personnel can not often be competent at this work.

To this present applicant has proposed a kind of technical scheme, and patent is applied for：Publication number：CN205956069U titles： A kind of new end suction centrifugal pump, but during later stage productive experiment, it is found that it has following problem：

1. the both direction power of drive shaft axial direction is born by the first locking nut and the second locking nut respectively；

2. the second locking nut rotates together with drive shaft, advancing slip dynamic bearing can be caused to rinse situation very poor；

3. thrust bearing uses ceramic balls thrust bearing, because to be interference fitted with drive shaft, and ceramic bearing is not It can heat, therefore can only little by little rivet, ceramics are again more crisp, easily bad, therefore assemble slow.

Utility model content

The utility model aims to solve the problem that above mentioned problem, there is provided a kind of anti-lock self-lubricating easy care centrifugal pump, it is used Mechanical seal is external, can greatly reduce maintenance time, low to maintenance personal's technical requirements, greatly extends bearing service life, The stability of pump is added, greatly reduces and is failed caused by pump shakes, all bearings do not need additional lubrication, dual-gripper Du Traditional cantilever pump locking caused by major axis deflection deformation absolutely, rear bearing assembly individually bear the both direction of left and right axial direction Power, the design of front and back bearings Simple detachable, disassembly efficiency is high, and the technical scheme of use is as follows：

A kind of anti-lock self-lubricating easy care centrifugal pump, it is characterised in that including：

Drive shaft；

Mechanical seal, its rotating ring is with drive shaft turns；

Middle valve jacket, it is detachably connected by bolt and mechanical seal, the middle valve jacket inwall radially shape Into the right backstop hole shoulder for having annular；

Pump cover, it is detachably connected by bolt and middle valve jacket, and the pump cover inwall is radially formed with annular Left backstop hole shoulder；

The pump housing, it is detachably connected by bolt and pump cover, and it has suction inlet and pump discharge, is formed at the suction inlet There is the support of bearing, the support of bearing is mainly integrally formed by the annular brace portion and ribs at middle part, and the ribs are around branch Support part is uniformly laid, described ribs one end and supporting part Joint, the other end and pump housing inwall Joint；

Fore bearing, it is arranged in supporting part, and is set at the head of drive shaft so that the head of drive shaft and support Portion is rotatablely connected；

Bearing assembly afterwards, it is arranged between left backstop hole shoulder and right backstop hole shoulder and supported by them, the bearing group Part is set in drive shaft, and the bearing assembly and left backstop hole shoulder and right backstop hole shoulder collective effect bear drive shaft can be by The axial force towards suction inlet and in suction inlet the two opposite directions；

Impeller, it is connected in drive shaft and with drive shaft turns, the impeller be located in the pump housing and positioned at fore bearing and Afterwards between bearing assembly.

On the basis of above-mentioned technical proposal, it is described after bearing assembly mainly by rear bearing block, rear bearing, forward thrust disk, push away Power disk seat, back pressure disk and thrust disc stationary ring composition, the rear bearing block and pump cover Joint, the rear bearing are fixed in rear axle In bearing, the drive shaft holds rotation connection, the thrust disc seat and drive shaft Joint through rear bearing and with rear axle, described Forward thrust disk is fixed on the left of thrust disc seat and its left side is in contact with rear bearing right side, and the back pressure disk, which is fixed in, to be pushed away On the right side of power disk seat and its right side is in contact with the left side of thrust disc stationary ring, and the thrust disc stationary ring is placed in drive shaft and not With drive shaft turns, by right backstop hole shoulder backstop on the right side of the thrust disc stationary ring.

On the basis of above-mentioned technical proposal, permission is provided between the thrust disc stationary ring right side and right backstop hole shoulder and is existed Axially there are the cushion that slight deformation quantity thinks forward thrust disk increase pretightning force, the thrust disc stationary ring and middle case set gap Or interference fits, the rear bearing assembly also include pin, have positioning hole, the pin on the right backstop hole shoulder left side Thrust disc stationary ring is caused to be only capable of to rotate along the axial movement of drive shaft through thrust disc stationary ring and positioning hole.

On the basis of above-mentioned technical proposal, the fore bearing is fixed in supporting part, and head and the front axle of drive shaft are forwarded Dynamic connection, offered on the internal face of the fore bearing and/or on outer peripheral face that drive shaft is engaged with fore bearing it is axial before Flushed channel.

On the basis of above-mentioned technical proposal, in addition to front head, itself and support of bearing Joint；Opened up on the front head There is the flushing hole being connected with preceding flushed channel.

On the basis of above-mentioned technical proposal, in addition to impeller locking nut, the impeller pass through key connection, institute with drive shaft Stating has positioning shaft shoulder in drive shaft, the drive shaft right side is butted in positioning shaft shoulder, the impeller locking nut and driving Axle thread connects and compresses the left side of impeller.

On the basis of above-mentioned technical proposal, in addition to flush pipe, the flush pipe connection pump discharge and mechanical seal, it is described Afterwards bearing assembly offer for for pumped (conveying) medium by with bearing assembly after lubricating, rinsing and bearing assembly and drive shaft it Between the irrigation channel in the dynamic face that is respectively in contact and quiet face, the quiet face refers to the face of absolute rest during the course of work, and dynamic face refers to The face of relatively quiet face motion during the course of work.

On the basis of above-mentioned technical proposal, the irrigation channel is from right to left successively mainly by right backstop hole shoulder and drive shaft Between clearance channel, clearance channel, thrust disc stationary ring left side and/or back pressure disk between thrust disc stationary ring and drive shaft Cavity, rear bearing right side between first flushed channel of the radial direction opened up on right side, middle valve jacket and thrust disc seat And/or forward thrust face left the radial direction opened up on end face the second flushed channel, be connected with the second flushed channel be opened in after Clearance channel between 3rd flushed channel of the axial direction on bearing inner wall face, rear bearing block and drive shaft forms.

On the basis of above-mentioned technical proposal, the flushing of connection impeller discharging opening and rear bearing assembly is offered on the impeller The flowing hole of passage.

On the basis of above-mentioned technical proposal, flow indicator is installed in the flush pipe.

The utility model has the following advantages that：1) mechanical seal is external, and layman also can within a very short time more The flimsy mechanical sealing parts of change poles greatly reduce maintenance time without dismantling pump group.

2) journal bearing of main load uses sliding bearing structure, greatly extends bearing service life, adds pump Stability, greatly reduce because pump shake caused by fail.

3) impeller belong to both ends support prevented the locking caused by major axis deflection deformation of traditional cantilever pump.

4) it is provided with irrigation channel, fore bearing and rear bearing assembly need not all add lubricating oil or lubricating grease etc. outside other Lubricating, be not in the problem of conventional pump needs periodic replacement lubricating oil and bearing housing oil leak to take place frequently.

6) front and back bearings Simple detachable designs, and fore bearing has dismounting groove, and rear bearing is designed to bearing block package structure, not In the case of tearing the pump housing and pump cover open, parts of bearings can be easily exchanged.

7) bearing assembly individually bears the both direction power of left and right axial direction afterwards.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art.It should be evident that drawings in the following description are only It is a kind of embodiment of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, the acquisition that can also be extended according to the accompanying drawing of offer is other to implement accompanying drawing.

Fig. 1 is the cross-sectional view of traditional end suction centrifugal pump；

Fig. 2 is that traditional end suction centrifugal pump dismantles the structural representation after pump cover bolt；

Fig. 3 is the disassemblying structure schematic diagram that traditional end suction centrifugal pump removes pump body portion；

Fig. 4 is the structural representation after traditional end suction centrifugal pump axle stress；

Fig. 5 is cross-sectional view of the present utility model；

Fig. 6 is the mplifying structure schematic diagram of C portion in Fig. 5；

Fig. 7 is the dimensional structure diagram of thrust disc stationary ring described in the utility model；

Fig. 8 is the cross-sectional view that thrust disc stationary ring described in the utility model is engaged place with right backstop hole shoulder；

Fig. 9 is dimensional structure diagram of the present utility model；

Figure 10 is the dimensional structure diagram of rear bearing described in the utility model；

Figure 11 is the dimensional structure diagram of the pump housing described in the utility model；

Figure 12 is the utility model half section structure diagram；

Embodiment

The utility model is described in further detail with example below in conjunction with the accompanying drawings：

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " first ", " second ", " the 3rd " are only used for describing Purpose, and it is not intended that instruction or hint relative importance.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be joined directly together, can also be indirectly connected by intermediary.For the ordinary skill in the art, Concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.

, it is necessary to the orientation or position relationship of the instruction such as explanation, term "left", "right" in description of the present utility model For the position relationship shown in based on accompanying drawing 5, it is for only for ease of description the utility model and simplifies description, rather than instruction or dark Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right Limitation of the present utility model.

As shown in Figure 5 to Figure 6, a kind of anti-lock self-lubricating easy care centrifugal pump, it is characterised in that including：

Drive shaft 51；

Mechanical seal 10, its rotating ring rotate with drive shaft 51；

Middle valve jacket 9, it is detachably connected by bolt and mechanical seal 10, and the middle inwall of valve jacket 9 is radially square To the right backstop hole shoulder 90 formed with annular；

Pump cover 6, it is detachably connected by bolt and middle valve jacket 9, and the inwall of pump cover 6 is radially formed with ring The left backstop hole shoulder 60 of shape, pump cover 6 synthesize pressure chamber with the pump housing；

The pump housing 1, it is detachably connected by bolt and pump cover 6, and it has suction inlet 100 and pump discharge 101, the suction Formed with the support of bearing 102 at mouth 100, the support of bearing 102 is mainly by the annular brace portion 102-1 and ribs at middle part 102-2 is integrally formed, and the ribs 102-2 is uniformly laid around supporting part 102-1, described ribs 102-2 one end and support Portion's 102-1 Joints, the other end and the inwall Joint of the pump housing 1；Fore bearing 19 can so be supported and pumped (conveying) medium can be allowed smooth By the way that the suction inlet bore of increasing can slow down velocity of medium, improve the cavitation erosion performance of pump；

Fore bearing 19, it is arranged in supporting part 102-1, and is set at the head of drive shaft 51 so that drive shaft 51 Head and supporting part 102-1 be rotatablely connected；

Bearing assembly afterwards, it is arranged between left backstop hole shoulder 60 and right backstop hole shoulder 90 and supported by them, the axle Bearing assembly is set in drive shaft 51, and the bearing assembly bears to drive with left backstop hole shoulder 60 and the collective effect of right backstop hole shoulder 90 The axial force towards suction inlet 100 and in suction inlet 100 the two opposite directions that moving axis 51 can be subject to；

Impeller 5, it is connected in drive shaft 51 and rotated with drive shaft 51, such as passes through key connection or mistake between them It is full of cooperation etc., the impeller 5 is located in the pump housing 1 and between fore bearing 19 and rear bearing assembly, for for fluid pressurized.Cause The rearmounted caudal end in pump of mechanical seal 10, once damage, in the case where the pump housing and pump cover need not be dismantled, you can dismounting Mechanical seal 10 is changed.

As shown in figure 11, wherein, for the ease of disassembly and installation fore bearing 19, the right-hand member inwall of the supporting part 102-1 Face is radially inwardly projecting formed with positioning step 150, on the internal face of the positioning step 150 and supporting part 102-1 Offer at least two symmetrical dismounting grooves 151.

As shown in Figure 6, it is preferred that it is described after bearing assembly mainly by rear bearing block 31, rear bearing 32, forward thrust disk 33, Thrust disc seat 34, back pressure disk 35 and thrust disc stationary ring 36 form, the rear bearing block 31 and the Joint of pump cover 6, such as pass through Screw is fixed on left backstop hole shoulder 60, and the rear bearing 32 is fixed on rear bearing block 31, when changing rear bearing, removes rear bearing Set, can remove rear bearing together, and the drive shaft 51 is rotatablely connected through rear bearing 32 and with rear bearing 32, such as is driven Axle 51 coordinates with the rear gap of bearing 32, the thrust disc seat 34 and the Joint of drive shaft 51, preferably thrust disc seat 34 and drive shaft Using threaded connection between 51, the forward thrust disk 33 is fixed in the left side of thrust disc seat 34 and its left side and the rear right-hand member of bearing 32 Face is in contact, and forward thrust disk 33 and rear bearing 32 bear to point to the axial thrust in the direction of suction inlet 100, and the back pressure disk 35 is solid It is connected to the right side of thrust disc seat 34 and its right side is in contact with the left side of thrust disc stationary ring 36, the thrust disc stationary ring 36 is placed on Rotated in drive shaft 51 and not with drive shaft 51, for example, thrust disc stationary ring 36 and the middle Joint of valve jacket 9, the thrust disc stationary ring The axial direction that 36 right sides are born to come in the direction of suction inlet 100 by the backstop of right backstop hole shoulder 90, thrust disc stationary ring 36 and back pressure disk 35 pushes away Power, wherein preferably, the rear bearing 32 is T fonts.

For Publication No. CN205956069U, for a kind of entitled technical scheme of the patent of new end suction centrifugal pump When thrust bearing uses ceramic balls thrust bearing, because to be interference fitted with drive shaft, and ceramic bearing can not heat, therefore Can only little by little it rivet, ceramics are again more crisp, easily bad, therefore assembling is slow, and after changing present rear bearing assembly into, As long as thrust disc seat 34 is tightened against in drive shaft 51 by screw thread, it is very easy to, efficiency high, it is preferred that forward thrust disk 33 and back pressure disk 35 be made up of ceramics.

As shown in Figure 8, it is preferred that permission is provided between the right side of thrust disc stationary ring 36 and right backstop hole shoulder 90 and is existed Axially there is slight deformation quantity to think that forward thrust disk 33 increases the cushion 37 of pretightning force, the thrust disc stationary ring 36 and middle case 9 gaps or interference fits are covered, the rear bearing assembly also includes pin 370, and it is fixed to have on the left side of right backstop hole shoulder 90 Position hole 900, the pin 370 cause thrust disc stationary ring 36 to be only capable of along drive shaft 51 through thrust disc stationary ring 36 and positioning hole 900 Axial movement and can not rotate.Such as can be in the edge of thrust disc stationary ring 36 formed with the pin agreed with the phase of pin 370 Groove 361, pin 370 are inserted in positioning hole through pin groove 361.It is to be noted that cushion 37 according to operating mode and medium not It is same to select different materials, or replaced with spring.

Preferably, the fore bearing 19 is fixed in supporting part 102-1, and the head of drive shaft 51 rotates with fore bearing 19 to be connected Connect, offered on the internal face of the fore bearing 19 and/or on outer peripheral face that drive shaft 51 is engaged with fore bearing 19 axial Preceding flushed channel.So fore bearing 19 is rinsed by preceding flushed channel using pumped (conveying) medium, lubricated.

For Publication No. CN205956069U, a kind of entitled technical scheme of the patent of new end suction centrifugal pump and Speech, because its second locking nut rotates together with drive shaft, it is very poor that this can cause fore bearing to rinse situation.Therefore it is preferable, also Including front head 20, it is not rotated with the Joint of the support of bearing 102 with together with drive shaft 51；Offered on the front head 20 with The flushing hole 200 that preceding flushed channel is connected.Before so pumped (conveying) medium can be introduced into by flushing hole 200 in flushed channel.

Preferably, in addition to impeller locking nut 30, the impeller 5 pass through key connection, the drive shaft with drive shaft 51 There is positioning shaft shoulder 510 on 51, the right side of drive shaft 51 is butted in positioning shaft shoulder 510, the impeller locking nut 30 with Drive shaft 51 is threadedly coupled and compresses the left side of impeller 5.

As shown in Figure 9, it is preferred that pump discharge 101 and mechanical seal 10 also are connected including flush pipe 7, the flush pipe 7, Bearing assembly is offered for passing through for pumped (conveying) medium with bearing assembly after lubricating, rinsing and bearing assembly and driving after described The dynamic face being respectively in contact between axle 51 and the irrigation channel in quiet face, the quiet face refer to the face of absolute rest during the course of work, move Face refers to the face of relatively quiet face motion during the course of work.Fluid with pressure can be introduced mechanical seal 10 and is rinsed by flush pipe 7, Lubrication.

As illustrated in fig. 7 and fig. 10, it is preferred that the irrigation channel is from right to left successively mainly by right backstop hole shoulder 90 with driving The clearance channel between clearance channel, thrust disc stationary ring 36 and drive shaft 51 between moving axis 51, the left side of thrust disc stationary ring 36 And/or the first flushed channel 360 of the radial direction opened up on the right side of back pressure disk 35, middle valve jacket 9 and thrust disc seat 34 it Between cavity, the radial direction opened up on the right side of rear bearing 32 and/or the left side of forward thrust disk 33 the second flushed channel 320, The 3rd flushed channel 321, the rear bearing for the axial direction being opened on the rear internal face of bearing 32 being connected with the second flushed channel 320 Clearance channel between seat 31 and drive shaft 51 forms.Further, connection impeller discharging opening 50 is offered on the impeller 5 with after The flowing hole 55 of the irrigation channel of bearing assembly.Pad or O shapes are preferably provided between middle valve jacket 9 and pump cover and mechanical seal 10 Circle, middle valve jacket 9 are used to collect flushing water.

It may be noted that so-called dynamic face and quiet face refer to such as the left side of thrust disc stationary ring 36 and the right-hand member of back pressure disk 35 For face, the left side of thrust disc stationary ring 36 is quiet face, and the right side of back pressure disk 35 is dynamic face；For the right-hand member of rear bearing 32 For face and the left side of forward thrust disk 33, the right side of rear bearing 32 is quiet face, and the left side of forward thrust disk 33 is dynamic face；It is right For the internal face of rear bearing 32 and the outer peripheral face of drive shaft 51, the internal face of rear bearing 32 is quiet face, drive shaft 51 it is outer Side face is dynamic face.

During work, the lubrication of pumped (conveying) medium, flushing hole 200 --- the preshoot of fore bearing 19 that flush path is front head 20 Washing trough is rinsed, --- --- the impeller discharging opening 50 of impeller 5 --- pump discharge 101 of the pump housing 1 --- rushes impeller 5 lubrication fore bearing Washing pipe 7 --- mechanical seal 10 is rinsed, lubricating mechanical sealing 10 ---, the gap between right backstop hole shoulder 90 and drive shaft 51 leads to The radial direction opened up on the left side of road --- clearance channel between thrust disc stationary ring 36 and drive shaft 51 --- thrust disc stationary ring 36 First flushed channel 360 --- cavity between middle valve jacket 9 and thrust disc seat 34 --- in direction is opened on the rear right side of bearing 32 If radial direction the second flushed channel 320 --- what is be connected with the second flushed channel 320 is opened on the rear internal face of bearing 32 Axial direction the 3rd flushed channel 321 --- clearance channel between rear bearing block 31 and drive shaft 51 --- on impeller 5 Flowing hole 55 --- impeller 5.

Pumped (conveying) medium just uses water lubrication if water, if oil just uses oil lubrication, if syrup is just moistened with syrup It is sliding, it is numerous to list herein.

When pumped (conveying) medium is not clean, washer envelope can be carried out with external pure pumped (conveying) medium and lubricates bearing in passing.

As shown in figure 9, further, flow indicator 70 is installed to show the stream of flushing flow rate in the flush pipe 7 Dynamic state.Backwashing manner uses single-pass configuration, once in the case of blocking, flow indicator 70 will be displayed without medium flow field It is dynamic, now need termination of pumping to overhaul.

Conventional end sucking pump is cantilever design because stress point hold off axis it is distant, can cause axle because amount of deflection bend because mouth The normal clearance of interannular only has 0.2~0.5mm, once because radial load causes shaft deflection to bend, locking just occurs.

The application is the deflection deformation that dual-support structure will not cause drive shaft, avoids the generation of locking problem.

As shown in figure 12, in order to keep the sealing between the formedness of wheel rotation and impeller and the pump housing preferable, institute The front end for stating impeller 5 is connected with impeller preoral loop 52-1, and the rear end of impeller 5 is connected with choma 53-1 after impeller, the pump housing 1 The internal opening position corresponding with impeller preoral loop 52-1 is provided with pump housing choma 52-2, behind the inside of the pump cover 6 and impeller Opening position corresponding choma 53-1 is provided with pump cover choma 53-2, and fixed connection mode can be that mode connects for screw, welding or interference are matched somebody with somebody Close, the gap of very little is formed between impeller preoral loop 52-1 and pump housing choma 52-2, play a part of to reduce backflow, synergy, impeller The gap of very little is formed between choma 53-1 and pump cover choma 53-2 afterwards, also plays a part of to reduce backflow, synergy.

Further, anti-wear sleeve is housed in drive shaft with the position of forward and backward bearing fit, axle sleeve fix on the driving shaft with Drive shaft rotates together.

On the one hand the technical scheme of the application inherits Publication No. CN205956069U, a kind of entitled novel end is sucked away from The technique effect of the patent of heart pump, on the other hand also have and be provided with irrigation channel, fore bearing and rear bearing assembly need not all add Add other external lubrications such as lubricating oil or lubricating grease, be not in that conventional pump needs to regularly replace lubricating oil and bearing housing body drain The problem of oil takes place frequently, the design of front and back bearings Simple detachable, fore bearing have dismounting groove, and rear bearing is designed to bearing block package structure, In the case where not tearing the pump housing and pump cover open, parts of bearings can be easily exchanged, rear bearing assembly individually bears left and right axial direction The technique effect of both direction power.

The utility model is illustrated by way of example above, but the utility model is not limited to above-mentioned specific implementation Example, all scopes that the requires of the utility model protection is belonged to based on any changes or modifications that the utility model is done.

Claims

A kind of 1. anti-lock self-lubricating easy care centrifugal pump, it is characterised in that including：

Drive shaft (51)；

Mechanical seal (10), its rotating ring rotate with drive shaft (51)；

Middle valve jacket (9), it is detachably connected by bolt and mechanical seal (10), and middle valve jacket (9) inwall is radially Right backstop hole shoulder (90) of the direction formed with annular；

Pump cover (6), it is detachably connected by bolt and middle valve jacket (9), pump cover (6) inwall radially formed with The left backstop hole shoulder (60) of annular；

The pump housing (1), it is detachably connected by bolt and pump cover (6), and it has suction inlet (100) and pump discharge (101), described Suction inlet (100) place is formed with the support of bearing (102), and the support of bearing (102) is mainly by the annular brace portion (102- at middle part 1) it is integrally formed with ribs (102-2), the ribs (102-2) are uniformly laid around supporting part (102-1), the ribs (102-2) one end and supporting part (102-1) Joint, the other end and the pump housing (1) inwall Joint；

Fore bearing (19), it is arranged in supporting part (102-1), and is set at the head of drive shaft (51) so that drive shaft (51) head is rotatablely connected with supporting part (102-1)；

Bearing assembly afterwards, it is arranged between left backstop hole shoulder (60) and right backstop hole shoulder (90) and supported by them, the axle Bearing assembly is set in drive shaft (51), the bearing assembly and left backstop hole shoulder (60) and right backstop hole shoulder (90) collective effect Bear the axial direction towards suction inlet (100) and in suction inlet (100) the two opposite directions that drive shaft (51) can be subject to Power；

Impeller (5), it is connected in drive shaft (51) and rotated with drive shaft (51), and the impeller (5) is located in the pump housing (1) simultaneously Between fore bearing (19) and rear bearing assembly.
A kind of 2. anti-lock self-lubricating easy care centrifugal pump according to claim 1, it is characterised in that：Bearing group after described Part is mainly by rear bearing block (31), rear bearing (32), forward thrust disk (33), thrust disc seat (34), back pressure disk (35) and thrust Disk stationary ring (36) forms, the rear bearing block (31) and pump cover (6) Joint, and the rear bearing (32) is fixed in rear bearing block (31) on, the drive shaft (51) through rear bearing (32) and with rear bearing (32) be rotatablely connected, the thrust disc seat (34) with Drive shaft (51) Joint, the forward thrust disk (33) is fixed on the left of thrust disc seat (34) and its left side and rear bearing (32) Right side is in contact, and the back pressure disk (35) is fixed on the right side of thrust disc seat (34) and its right side and thrust disc stationary ring (36) Left side be in contact, the thrust disc stationary ring (36) be placed in drive shaft (51) and not with drive shaft (51) rotate, it is described to push away By right backstop hole shoulder (90) backstop on the right side of power disk stationary ring (36).
A kind of 3. anti-lock self-lubricating easy care centrifugal pump according to claim 2, it is characterised in that：The thrust disc is quiet Permission is provided between ring (36) right side and right backstop hole shoulder (90) is axially having slight deformation quantity to think forward thrust disk (33) cushion (37) of pretightning force, the thrust disc stationary ring (36) and middle valve jacket (9) gap or interference fits are increased, it is described Bearing assembly also includes pin (370) afterwards, has positioning hole (900), the pin on right backstop hole shoulder (90) left side (370) thrust disc stationary ring (36) is caused to be only capable of the axial direction along drive shaft (51) through thrust disc stationary ring (36) and positioning hole (900) Move and can not rotate.
A kind of 4. anti-lock self-lubricating easy care centrifugal pump according to claim 1, it is characterised in that：The fore bearing (19) it is fixed in supporting part (102-1), head and the fore bearing (19) of drive shaft (51) are rotatablely connected, the fore bearing (19) Internal face on and/or the outer peripheral face that is engaged with fore bearing (19) of drive shaft (51) on offer axial preceding flushed channel.
A kind of 5. anti-lock self-lubricating easy care centrifugal pump according to claim 4, it is characterised in that：Also include front head (20), itself and the support of bearing (102) Joint；The flushing hole being connected with preceding flushed channel is offered on the front head (20) (200)。
A kind of 6. anti-lock self-lubricating easy care centrifugal pump according to claim 1, it is characterised in that：Also include impeller lock Tight nut (30), the impeller (5) and drive shaft (51) have positioning shaft shoulder by key connection on the drive shaft (51) (510), drive shaft (51) right side is butted in positioning shaft shoulder (510), the impeller locking nut (30) and drive shaft (51) it is threadedly coupled and compresses the left side of impeller (5).
A kind of 7. anti-lock self-lubricating easy care centrifugal pump according to claim 1 or 5, it is characterised in that：Also include punching Pipe (7), flush pipe (7) the connection pump discharge (101) and mechanical seal (10) are washed, the rear bearing assembly is offered for supplying Pumped (conveying) medium by the dynamic face to be respectively in contact in bearing assembly after lubricating, rinsing and between bearing assembly and drive shaft (51) and The irrigation channel in quiet face, the quiet face refer to the face of absolute rest during the course of work, and dynamic face refers to relatively quiet face during the course of work The face of motion.
A kind of 8. anti-lock self-lubricating easy care centrifugal pump according to claim 7, it is characterised in that：The irrigation channel From right to left successively mainly by the clearance channel between right backstop hole shoulder (90) and drive shaft (51), thrust disc stationary ring (36) with driving The footpath opened up in clearance channel, thrust disc stationary ring (36) left side and/or back pressure disk (35) right side between moving axis (51) To the cavity between first flushed channel (360), middle valve jacket (9) and thrust disc seat (34) in direction, rear bearing (32) right side And/or the radial direction opened up on forward thrust disk (33) left side the second flushed channel (320), with the second flushed channel (320) phase The 3rd flushed channel (321), rear bearing block (31) and the driving of the axial direction being opened on rear bearing (32) internal face of connection Clearance channel composition between axle (51).
A kind of 9. anti-lock self-lubricating easy care centrifugal pump according to claim 8, it is characterised in that：The impeller (5) On offer connection impeller discharging opening (50) and rear bearing assembly irrigation channel flowing hole (55).
A kind of 10. anti-lock self-lubricating easy care centrifugal pump according to claim 7, it is characterised in that：The flush pipe (7) flow indicator (70) is installed on.