CN209164160U - A kind of axial force balance structure of long-shaft pump - Google Patents

Abstract

The utility model relates to pump technical fields, more particularly to a kind of axial force balance structure of long-shaft pump, it is held including pump shaft, first bearing seat, first sliding axle and thrust disc, thrust disc, first sliding axle, which are held, is successively sheathed on pump shaft along pump shaft radial direction with first bearing seat, first sliding axle, which is held, is mounted on first bearing seat, thrust disc and first sliding axle form balance cylinder between holding, thrust disc includes pan portion and portions, the outer diameter of pan portion is greater than the outer diameter of portions, and the junction of pan portion and portions is recessed to form balance ring slot along the axial direction of thrust disc.The utility model structure is simple, and the residual axial force that energy active balance long-shaft pump generates during the work time improves the stability and service life of long axis pump work.

Description

A kind of axial force balance structure of long-shaft pump

Technical field

The utility model relates to pump technical field more particularly to a kind of axial force balance structures of long-shaft pump.

Background technique

Under current existing vertical guide-vane liquid in long-shaft pump, there are two types of big patterns: one kind is guide bearing structure type Formula, another kind are rolling bearing structure pattern.Wherein, it is residual to be divided into the weight of entire rotor part, water pump for guide bearing structure pattern Remaining axial force is born by motor and the thrust bearing by being arranged in above pump holder bears two kinds of structures；Rolling bearing structure type Formula is divided into two kinds of structures of common axle envelope and combined automatic drain.

Long-shaft pump is due to being not provided with residual axial force balance system under existing vertical solution, at runtime due to water pump, by In the pressure difference of impeller assembly water inlet end and water outlet, and the pressure of water inlet end is greater than the pressure of water outlet, cause pump bearing by Axial force it is larger, and then cause water pump operation generate residual axial force can increase motor or be arranged in above pump holder The damage process of thrust slide bearing.

Utility model content

The purpose of the utility model is to provide a kind of residual axial forces of energy active balance long-shaft pump, improve job stability With the axial force balance structure of service life.

To achieve the goals above, the utility model provides a kind of axial force balance structure of long-shaft pump, including pump shaft, One bearing block, first sliding axle are held and thrust disc, and the thrust disc, first sliding axle are held with first bearing seat along pump shaft radial direction side To pump shaft is successively sheathed on, the first sliding axle, which is held, is mounted on first bearing seat, the thrust disc and first sliding axle Balance cylinder is formed between holding, the thrust disc includes pan portion and portions, and the outer diameter of the pan portion is greater than the outer diameter of portions, the disk Portion and the junction of portions are recessed to form balance ring slot along the axial direction of thrust disc.

Optionally, the thrust disc is equipped with lower rubbing surface and side rubbing surface, and the first sliding axle, which is held, is equipped with radial lubrication Slot and axial lubrication combine formation between the lower rubbing surface and radial lubrication groove, between side rubbing surface and axial lubrication The balance cylinder.

Optionally, the radial lubrication groove is the streamline for rotating clockwise around thrust disc axial direction or rotating counterclockwise Type structure.

Optionally, the radial lubrication groove is connected to simultaneously rounding off with axial lubrication.

Optionally, the cross section of the balance annular groove is half arc groove.

Optionally, the pump shaft includes the first coupling spindle, the second coupling spindle and shaft coupling component, and the shaft coupling component includes the One shaft coupling, elastomer block and second shaft coupling, the first shaft coupling are installed on the first coupling spindle, the second coupling spindle installation In the second coupling spindle, the elastomer block couples axis connection, the first shaft coupling and second with the first coupling spindle and second respectively There is the first gap between shaft coupling.

Implement the embodiments of the present invention, has following technical effect that

The utility model structure is simple, holds first sliding axle and forms balance cylinder between thrust disc, when the liquid of pumping When passing through balance cylinder, liquid-driving thrust disc and first sliding axle hold between generate relative motion, form liquid in balance cylinder Annular seal water ring, has the function that dynamic sealing, so that the pressure of liquid be made to decline, holds thrust disc close to first sliding axle The pressure of one end be greater than the pressure of the one end held far from first sliding axle, so that the residual axial force of pump shaft be balanced, improve The stability of pump shaft work and the service life of long-shaft pump；In addition, thrust disc is equipped with balance annular groove, in liquid by balance cylinder In the process, liquid effects make every effort to promote the side for holding thrust disc to the axial direction of pump shaft and far from first sliding axle to balance annular groove To separate, to further improve the ability of balanced residue axial force.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the present embodiment one.

Fig. 2 is the upper section structural schematic diagram of the present embodiment one.

Fig. 3 is the middle section structure schematic diagram of the present embodiment one.

Fig. 4 is the lower section structural schematic diagram of the present embodiment one.

Fig. 5 is the enlarged diagram of f in Fig. 1.

Fig. 6 is the enlarged diagram of a in Fig. 2.

Fig. 7 is the enlarged diagram of e in Fig. 6.

Fig. 8 is the enlarged diagram of b in Fig. 4.

Fig. 9 is the enlarged diagram of c in Fig. 4.

Figure 10 is that the first sliding axle of the present embodiment one holds schematic diagram.

Figure 11 is the thrust disc schematic diagram of the present embodiment one.

Figure 12 is the thrust button schematic diagram of the present embodiment one.

Figure 13 is the structural schematic diagram of the present embodiment two.

Figure 14 is the enlarged diagram of d in Figure 13.

Figure 15 is the water outlet horn mouth schematic diagram of the present embodiment two.

Figure 16 is the second axle envelope gland schematic diagram of the present embodiment two.

Description of symbols:

In Fig. 1: 1, upper section；2, middle section；3, lower section；100, lubricating cavity；200, pump chamber；A, the first gap；

In Fig. 2: 4, pump holder；5, connecting tube；6, pillar；7, second bearing seat；8, third sliding bearing；9, the first shaft coupling Device；10, drain pipe；11, third axle sleeve；12, pump shaft；13, pressure detector；14, first bearing seat；15, first sliding axle is held； 16, thrust ring；17, axle envelope seat；18, first axle sealed cover；19, fixture nut；20, water pump coupler；21, the first axle envelope；22, Electric machine support；23, into drain pipe；24, the first solenoid valve；25, the first axle sleeve；26, thrust disc；

In Fig. 3: 5, connecting tube；6, pillar；7, second bearing seat；8, third sliding bearing；9, first shaft coupling；11, Three axle sleeves；12, pump shaft；14, first bearing seat；15, first sliding axle is held；26, thrust disc；27, stopping shim；28, circle spiral shell It is female；29, second shaft coupling；30, elastomer block；

In Fig. 4: 5, connecting tube；6, pillar；12, pump shaft；14, first bearing seat；26, thrust disc；27, stopping shim；28, Round nut；29, second shaft coupling；30, elastomer block；31, flushing hole；32, plug；33, first throttle set；34, the second axle sleeve； 35, second sliding axle is held；36, thrust button；37, impeller；38, water-inlet horn mouth；39, strainer；40, impeller nut；41, guide vane； 42, it is discharged horn mouth；43, chamber is rinsed；

In Fig. 5: 9, first shaft coupling；29, second shaft coupling；30, elastomer block；A, the first gap；

In Fig. 6: 12, pump shaft, 14, first bearing seat；15, first sliding axle is held；16, thrust ring；17, axle envelope seat；21, One axle envelope；25, the first axle sleeve；26, thrust disc；44, O-ring；45, liquid collecting cavity；46, liquid collecting room；

In Fig. 7: 15, first sliding axle is held；16, thrust ring；26, thrust disc；47, balance cylinder；52, annular groove is balanced；B, Two gaps.

In Fig. 8: 12, pump shaft；14, first bearing seat；15, first sliding axle is held, 26, thrust disc, 27, stopping shim；28, Round nut, 44, O-ring；47, balance cylinder；

In Fig. 9: 12, pump shaft；34, the second axle sleeve；35, second sliding axle is held；36, thrust button；43, chamber is rinsed；44, O-shaped Circle；C, third space；D, the 4th gap；

In Figure 10: 48, radial lubrication groove；49, axial lubrication；

In Figure 11: 50, upper rubbing surface；51, lower rubbing surface；52, annular groove is balanced；53, side rubbing surface；261, pan portion, 262, Portions；

In Figure 12: 36, thrust button；54, radial flushed channel；

In Figure 13: 23, into drain pipe；24, the first solenoid valve；55, inlet tube；56, regulating valve；57, temperature measuring probe； 58, first pressure detection probe；59, second pressure detection probe；60, second solenoid valve；61, third solenoid valve；62, it rinses Pipe；42, it is discharged horn mouth；64, the second axle envelope gland；65, the second axle envelope；66, the second throat bushing；

In Figure 14: 12, pump shaft；44, O-ring；64, the second axle envelope gland；65, the second axle envelope；66, the second throat bushing；

In Figure 15: 67, lubricating fluid apertures；68, axle envelope room；69, throttle orifice；

In Figure 16: 64, the second axle envelope gland；70, fluid hole.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.

Embodiment 1:

With reference to Fig. 1~Figure 12, present embodiments provide long-shaft pump under a kind of vertical solution, including control unit, connecting tube 5, Pump shaft 12 and it is installed on the impeller assembly of pump shaft 12, pillar 6, first bearing component, gland seal assembly and fixture nut 19, pillar Lubricating cavity 100 is formed between 6 and gland seal assembly and pump shaft 12, the first end of connecting tube 5 is connect with impeller assembly, connecting tube 5 Second end connect with first bearing component, between connecting tube 5 and pillar 6 formed pump chamber 200, first bearing component include first Bearing block 14, first sliding axle hold 15 and thrust disc 26, thrust disc 26, first sliding axle hold 15 and first bearing seat 14 along pump shaft 12 radial directions are successively sheathed on pump shaft 12, and first sliding axle holds 15 and is mounted on first bearing seat 14, thrust disc 26 and Balance cylinder 47 is formed between one sliding bearing 15, fixture nut 19 is threadedly coupled with pump shaft 12 for fixing thrust disc 26；

When the axial direction that the operating condition of long-shaft pump is changed (when i.e. operating pressure fluctuates and sultry running occurs) or pumped When power is unable to complete equipilibrium, the residual axial force of long-shaft pump is balanced by balance cylinder 47, i.e., when the liquid of pumping is by putting down When weighing apparatus room 47, liquid-driving thrust disc 26 and first sliding axle hold and generate relative motion between 15, make liquid in 47 shape of balance cylinder Water ring is circlewise sealed, has the function that dynamic sealing, so that the pressure of liquid be made to decline, keeps thrust disc 26 sliding close to first The pressure of one end of dynamic bearing 15 is greater than the pressure that separate first sliding axle holds 15 one end, so that the remnants by pump shaft 12 are axial Dynamic balance improves the service life of stability and long-shaft pump that pump shaft 12 works.

With reference to Fig. 4 and Fig. 9, impeller assembly includes impeller 37 and guide vane 41, and pump shaft 12 is arranged with second sliding axle and holds 35 Hes Second axle sleeve 34, second sliding axle, which is held 35 and is arranged, is fixed on 41 inside of guide vane, and the second axle sleeve 34 is sheathed on to be held with second sliding axle It 35 insides and is keyed with pump shaft 12, guide vane 41, second sliding axle hold 35 and second and formed between axle sleeve 34 and rinse chamber 43, lead Leaf 41 is equipped with flushing hole 31, and flushing hole 31 is connected to form irrigation channel with chamber 43 is rinsed, and wherein pump shaft 12 is equipped with impeller nut 40 for fixing impeller assembly；

It can be rinsed by the external flushing device of flushing hole 31, flushing liquor is flowed into through flushing hole 31 and rinses chamber 43, it is right Second sliding axle is held 35 and is rinsed, and removing is deposited in silt and impurity that second sliding axle holds 35；

With reference to Fig. 1 and Fig. 6, gland seal assembly is connected with into drain pipe 23, is equipped with the first solenoid valve 24 into drain pipe 23, the One solenoid valve 24 is electrically connected with control unit；

It is connected to form lubrication channel with irrigation channel into drain pipe 23, lubricating cavity 100, balance cylinder 47.

Pump chamber 200 is equipped with pressure detector 13, and pressure detector 13 is electrically connected with control unit.

Further, with reference to Fig. 1~4 and Fig. 5, the long-shaft pump of the present embodiment includes upper section 1, middle section 2, lower section 3, wherein Pump shaft 12 includes the first coupling spindle, the second coupling spindle and shaft coupling component, and shaft coupling component includes first shaft coupling 9,30 and of elastomer block Second shaft coupling 29, first shaft coupling 9 are installed on the first coupling spindle, and the second coupling spindle is installed on the second coupling spindle, elastomer block 30 Couple axis connection with the first coupling spindle and second respectively, cooperation has between first between first shaft coupling 9 and second shaft coupling 29 Gap A makes between first shaft coupling 9 and second shaft coupling 29 there is the space of axial movement can be buffered by elastomer block 30, The present embodiment has three coupling spindles, is connected by shaft coupling component, and shaft coupling component is locked by round nut 28 and stopping shim 27 It is fixed, wherein those skilled in the art can be according to the quantity of actual use situation setting coupling spindle, and coupling spindle is soft using sectional type Property connection, sliding bearing do not have to the entire rotor weight for bearing pump, solve long-shaft pump because under liquid length it is long due to caused by transport, Vibration, noise hang-up when installation difficulty and pump are using operation, improve the property safe and reliable to operation of pump, extend pump Service life；In addition, three coupling spindles of the present embodiment are connected by first shaft coupling 9, elastomer block 30 and second shaft coupling 29 It connects, by the elastic buffer and reaction force of elastomer block 30, the residual axial force generated at work to pump shaft 12 is balanced, The ability of long-shaft pump balanced residue axial force is further improved, the service life and job stability of long-shaft pump are improved.

With reference to Fig. 6, wherein pump shaft 12 is arranged with first throttle set 33, and first throttle set 33 is set to 100 He of lubricating cavity It rinses between chamber 43, makes sufficiently to contact and be lubricated with sliding bearing by the lubricating fluid of lubricating cavity 100 and flushing chamber 43, mention High lubricant effect.

With reference to Figure 11, the thrust disc 26 of the present embodiment includes pan portion 261 and portions 262, and the outer diameter of pan portion 261 is greater than portions The junction of 262 outer diameter, pan portion 261 and portions 262 offers balance annular groove 52, in liquid by the process of balance cylinder 47 In, making every effort to promote for liquid effects to balance annular groove 52 makes thrust disc hold 15 to the axial direction of pump shaft 12 and far from first sliding axle Direction is separate, to further improve the ability of balanced residue axial force, the cross section of balance annular groove 52 is half arc groove, Make thrust disc 26 when bearing axial compressive force, the stress for reducing pan portion 261 and 262 junction of portions is concentrated, and 261 He of pan portion is improved The local pressure limit that portions 262 connect.

Thrust disc 26 is equipped with upper rubbing surface 50, lower rubbing surface 51 and side rubbing surface 53, increases liquid and flows through thrust disc 26 When and thrust disc 26 between frictional force, and the resultant direction of the frictional force generated is axially away from first sliding axle to hold 15 sides To further improving the ability of the present embodiment balanced residue axial force；Lower rubbing surface 51 passes through balance ring with side rubbing surface 53 Slot 52 connects, and first sliding axle holds 15 and is equipped with radial lubrication groove 48 and axial lubrication 49, lower rubbing surface 51 and radial lubrication groove It combines to form balance cylinder 47 between 48, between side rubbing surface 53 and axial lubrication 49, radial lubrication groove 48 is to rotate clockwise Or the streamlined structure rotated counterclockwise, radial lubrication groove 48 is connected to axial lubrication 49 and rounding off, is flowing liquid Come into full contact with during dynamic with radial lubrication groove 48 and axial lubrication 49, improve lower rubbing surface 51 and radial lubrication groove 48 it Between, combine between side rubbing surface 53 and axial lubrication 49 formation balance cylinder 47 sealing effect.

Wherein first sliding axle holds 15 and is met material using high molecular polymers and be made, and first sliding axle is held and is provided on 15 Screw hole, screw hole are arranged in radial lubrication groove 48, and thrust disc 26 is made of metal material, wherein upper rubbing surface 50, under rub Wiping face 51 and side rubbing surface 53 are that spraying alloy material is formed.

With reference to Fig. 6, the first bearing seat 14 in the present embodiment close to liquid collecting cavity 45 is offered for collecting from gland seal assembly The liquid collecting room 46 of the liquid of middle leakage, liquid collecting room 46 are connected with drain pipe 10, and the medium that liquid collecting room 46 collects passes through drain pipe 10 It is flowed back in pond or the volume tank of long-shaft pump installation afterwards, resource is saved in recycling.

With reference to Fig. 1 and Fig. 7, specifically, gland seal assembly includes axle envelope seat 17, the first axle envelope 21 and first axle sealed cover 18, Axle envelope seat 17 is fixedly connected with first bearing seat 14, and O-ring 44, pump shaft 12 are equipped between axle envelope seat 17 and first bearing seat 14 It is arranged with the first axle sleeve 25, first axle big envelope is set to 25 outside of the first axle sleeve, and first axle sealed cover 18 is installed on the use of axle envelope seat 17 In fixing the first axle envelope 21, the first axle sleeve 25 is connected to 26 one end of thrust disc, and fixture nut 19 is threadedly connected to pump shaft 12 and is used for The first axle sleeve 25 and thrust disc 26 are fixed, O-ring 44 is equipped between fixture nut 19 and the first axle sleeve 25, axle envelope seat 17 passes through spiral shell Nail thrust ring 16 is installed, the second gap B can be formed on thrust ring 16 and thrust disc 26 between rubbing surface 50, make thrust button 16 with There is the space of buffering and axial movement between thrust disc 26, prevent dieback, thrust ring 16, axle envelope seat 17, the first axle envelope 21, the Liquid collecting cavity 45 is formed between one axle sleeve 25, liquid collecting cavity 45, balance cylinder 47, lubricating cavity 100, irrigation channel are sequentially communicated to form lubrication Channel is connected to liquid collecting cavity 45 into drain pipe 23, and thrust ring 16 offers radial lubrication groove 48 and screw hole, screw hole setting In radial lubrication groove 48, thrust ring 16 is connect by screw hole with 17 screw of axle envelope seat, and liquid collecting cavity 45 passes through radial lubrication groove 48 are connected to balance cylinder 47.

With reference to Fig. 3, the present embodiment further includes second bearing component, and second bearing component includes second bearing seat 7, third cunning Dynamic bearing 8 and third axle sleeve 11, third axle sleeve 11 are sheathed on pump shaft 12, and third sliding bearing 8 is installed on second bearing seat 7 and covers Set on 11 outside of third axle sleeve, the stability of pump shaft 12 in the process of running is further increased.

With reference to Fig. 4 and Fig. 9, wherein be equipped with thrust button 36 between guide vane 41 and impeller 37, thrust button 36 is sheathed on pump shaft 12, and there is the 4th clearance D between impeller 37 and guide vane 41, make long-shaft pump at work, impeller 37 and guide vane 41 have buffering Space, prevent dieback, thrust button 36 and second sliding axle hold formation third space C between 35, make thrust button 36 and the second cunning There is the space of buffering and axial movement between dynamic bearing 35, prevent dieback, thrust button 36 is equipped with radial flushed channel 54 and rinses Chamber 43 is connected to, and when flushing hole 31 flows into flushing liquor, flushing liquor is rinsed radial flushed channel 54 after flowing through flushing chamber 43, nothing When need to rinse, flushing hole 31 is equipped with plug 32.

When starting, control unit issues instruction, and the first solenoid valve 24 is opened, and extraneous bearing lubrication liquid or send medium with pumping Identical liquid, by flowing through liquid collecting cavity 45 into drain pipe 23, first sliding axle holds 15, lubricating cavity 100, irrigation channel and pump chamber 200 mix with the medium pumped, and after the bearing lubrication liquid stream angle of incidence reaches control unit preset time, control unit sending refers to It enables, starts long-shaft pump, when long axis pump operation, long-shaft pump pumps medium and flow generation lift from bottom to top, when pressure detector 13 When detecting that the pressure of pump chamber 200 reaches preset pressure, control unit issues instruction, and the first solenoid valve 24 is closed, extraneous bearing Lubricating fluid stops flow into, and long-shaft pump enters normal operation, and long-shaft pump pumps medium and holds 35, lubricating cavity 100 by second sliding axle It flows into after liquid collecting cavity 45 to flow out on a small quantity by gland seal assembly Deng from bottom to top and be collected by liquid collecting room 46, Jie that liquid collecting room 46 collects Matter flows back in pond or the volume tank of long-shaft pump installation by drain pipe 10, after long-shaft pump orderly closedown when starting next time, weight Multiple above-mentioned start-up course, is ensured that the sliding bearing of long-shaft pump is not in the generation of dry friction phenomenon；Work as long-shaft pump The operating condition axial force that changes (i.e. operating pressure fluctuation and occur when Ya not running) or pump when being unable to complete equipilibrium, The residual axial force of long-shaft pump is balanced by balance cylinder 47, i.e., thrust disc 26 plays the role of balanced residue axial force.

It further include water-inlet horn mouth 38 with reference to Fig. 4, water-inlet horn mouth 38 is coupled in guide vane 41 and between impeller 37 Gap is cooperatively formed, water-inlet horn mouth 38 is equipped with strainer 39, to biggish particle filtering in the liquid for entering long-shaft pump, prevents Damage the pump housing.

It further include pump holder 4 with reference to Fig. 2, drain pipe 10 is installed on pump holder 4, is equipped with electric machine support on pump holder 4 22, wherein one end of pump shaft 12 is equipped with water pump coupler 20 for connecting motor.

Embodiment 2:

With reference to Figure 13~Figure 16, the present embodiment the difference from embodiment 1 is that, further include water outlet horn mouth 42, be discharged loudspeaker Mouth 42 is fixedly connected with connecting tube 5 and impeller assembly respectively, and pump shaft 12 is arranged with the second throat bushing 66, water outlet horn mouth 42 with The second axle envelope 65 is equipped between second throat bushing 66, pump shaft 12 is equipped with the second axle envelope gland 64 and the second axle envelope 65 cooperates, out Water horn mouth 42 is equipped with lubrication fluid apertures 67, axle envelope room 68 and throttle orifice 69, and the second axle envelope gland 64 is equipped with fluid hole 70, lubricating fluid Hole 67 is connected to by fluid hole 70 with pump chamber 200, and lubrication fluid apertures 67 is connected with inlet tube 55, is provided with regulating valve on inlet tube 55 56, temperature measuring probe 57 and first pressure detection probe 58, regulating valve 56,57 and of temperature measuring probe are equipped with into drain pipe 23 First pressure detection probe 58 is electrically connected with control unit, and the pump shaft sleeve in the present embodiment is equipped with the second axle envelope 65, prevents The impurity that the medium pumped includes is easy to enter guide bearing as the high speed rotation of axis generates lift, makes guide bearing and pump shaft 12 Serious wear；In addition, preventing lubricating cavity to be connected to pump chamber by the second axle envelope 65, avoid when the lift that water pump generates is high, it is long Cooling pressure needed for axis pump is also high (cooling pressure is greater than the lift that long-shaft pump generates), at this moment will increase the axial direction of long-shaft pump Power, by reducing the pressure of impeller assembly pump chamber, to reduce needed for long-shaft pump cooling pressure, thus reduce thrust bearing or The damaged condition of motor.

Further, flushing hole 31 is connected with flushing pipe 62, and flushing pipe 62 is provided with second solenoid valve 60, third solenoid valve 61 and second pressure detection probe 59, second solenoid valve 60, third solenoid valve 61 and second pressure detection probe 59 with control Unit electrical connection.

When long-shaft pump starts starting, control unit issues instruction, and second solenoid valve 60 is opened, and extraneous flushing liquor is through flushing pipe 62, flushing hole 31, which flows into, rinses chamber 43, holds 35 to second sliding axle and is rinsed, removing is deposited on second sliding axle and holds 35 Silt or impurity；When washing time reaches control unit preset time, control unit issues instruction, and second solenoid valve 60 is closed, Regulating valve 56 is opened, and the first solenoid valve 24 is opened, and external bearing lubrication liquid flows into lubrication fluid apertures 67, fluid hole through inlet tube 55 70, lubricating cavity 100, first sliding axle are held by flowing out into drain pipe 23 after 15 and liquid collecting cavity 45, first pressure detection probe 58 When detecting that pressure reaches preset value, control unit issues instruction, starts long-shaft pump, the operation of long axis pump startup, control unit hair It instructing out, regulating valve 56 reduces flow and saves lubricating fluid resource, and long-shaft pump enters normal operation, after long-shaft pump orderly closedown, to When starting next time, above-mentioned start-up course casing is repeated, is ensured that the sliding bearing of long-shaft pump is not in dry friction phenomenon Occur；

Long-shaft pump is equipped with the second axle envelope 65 and the second throat bushing 66, guarantees the bearing lubrication liquid of long-shaft pump and pumps medium Mixing will not be contacted, long axis pump operation works, when temperature measuring probe 57 detects high temperature or low temperature preset value, control unit Instruction is issued, regulating valve 56 opens the flow for increasing bearing lubrication liquid gradually to reduce or improve sliding bearing, pump shaft 12 etc. Temperature, when temperature measuring probe 57, which detects, allows running temperature values, regulating valve 56 is opened, it is ensured that the normal fortune of long-shaft pump Row, when temperature measuring probe 57 detects the shutdown value of setting operation high temperature or low temperature, control unit issues instruction, long-shaft pump It is out of service；When realizing and ensuring that long-shaft pump pumps high temperature or cryogenic media, it is also able to achieve the high temperature or low temperature environment of long-shaft pump Middle use.

When the operating condition of long-shaft pump changes or the axial force of pump shaft 12 is unable to complete equipilibrium, second pressure detection When probe 59 detects highest setting pressure value, control unit issues instruction, and second solenoid valve 60 is opened, and long-shaft pump generates residual The pressure release after flushing chamber 43, flushing hole 31 and flushing pipe 62 of remaining axial force, carries out the balance of residual axial force, works as second pressure When detection probe 59 detects minimum setup pressure value, second solenoid valve 60 is closed, and long-shaft pump operates normally；

After long-shaft pump orderly closedown, control unit issues instruction, and third solenoid valve 61 is opened, and external flushing liquor is through flushing pipe 62 flow into flushing chamber 43, hold 35 to second sliding axle and are rinsed, removing is deposited in silt and impurity that second sliding axle holds 35； When washing time reaches control unit setting time value, control unit issues instruction, and third solenoid valve 61 is closed, and completes long-shaft pump Orderly closedown process.

To sum up, the utility model can pump cleaning, the room temperature medium containing suitable particles, can also pump high temperature, low temperature Medium；Before long axis pump startup, sliding bearing can be lubricated by being passed through lubricating fluid into lubricating cavity 100 into drain pipe 23, There is the phenomenon that dry friction between sliding bearing and pump shaft 12 after preventing long axis pump startup, effectively improve pump shaft 12 uses the longevity Life, and when long axis pump operation, when generating residual axial force, it is balanced by the balance cylinder 47 that 26 two sides of thrust disc are formed residual Remaining axial force is lubricated it is not necessary that thrust bearing and lubrication system is in addition arranged, and is realized while sliding bearing lubricating remaining The balance of axial force；The flow of lubricating fluid is adjusted by the switch of solenoid valve during lubrication for sliding bearing simultaneously The temperature of sliding bearing can be adjusted, realize cooling in the sliding bearing course of work；

In addition, the pump shaft 12 in the utility model can be made up of more coupling spindles the connection of shaft coupling component, shaft coupling component Include elastomer block 30, make more coupling spindle flexible connecteds, without bearing the entire rotor weight of pump, solution when sliding bearing works Determined long-shaft pump because under liquid length it is long due to caused by transport, installation difficulty and long-shaft pump using operation when vibration, noise Big problem improves the property safe and reliable to operation of pump, extends the service life of long-shaft pump；

It is formed between axle sleeve 34 finally, guide vane 41, second sliding axle hold 35 and second and rinses chamber 43, guide vane 41, which is equipped with, to be rinsed Hole 31, flushing hole 31 are connected to form irrigation channel with chamber 43 is rinsed, and before long-shaft pump booting or after use, can pass through flushing hole 31 Connection flushing device is rinsed the gap between guide vane 41 and pump shaft 12, prevents the granule foreign in pumping liquid from remaining in Between guide vane 41 and pump shaft 12, causes pump shaft 12 or guide vane 41 to generate abrasion when avoiding starting next time, improve guide vane 41 and pump The service life of axis 12.

In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand For limitations of the present invention.

In addition, various information are described in the utility model using term " first ", " second " etc., but these information are not answered It is limited to these terms, these terms are only used to for same type of information being distinguished from each other out.For example, not departing from the utility model In the case where range, " first " information can also be referred to as " second " information, and similar, " second " information can also be referred to as " first " information.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change It also should be regarded as the protection scope of the utility model into replacement.

Claims (6)

1. a kind of axial force balance structure of long-shaft pump, which is characterized in that held including pump shaft, first bearing seat, first sliding axle And thrust disc, the thrust disc, first sliding axle, which are held, is successively sheathed on pump shaft along pump shaft radial direction with first bearing seat, described First sliding axle, which is held, is mounted on first bearing seat, the thrust disc and first sliding axle hold between form balance cylinder, it is described Thrust disc includes pan portion and portions, and the outer diameter of the pan portion is greater than the outer diameter of portions, and the junctions of the pan portion and portions is along pushing away The axial direction of power disk is recessed to form balance ring slot.

2. the axial force balance structure of long-shaft pump according to claim 1, which is characterized in that the thrust disc, which is equipped with down, to rub Wiping face and side rubbing surface, the first sliding axle, which is held, is equipped with radial lubrication groove and axial lubrication, the lower rubbing surface and radial direction It combines to form the balance cylinder between lubrication groove, between side rubbing surface and axial lubrication.

3. the axial force balance structure of long-shaft pump according to claim 2, which is characterized in that it is described radial direction lubrication groove be around The thrust disc axial direction streamlined structure that rotates clockwise or rotate counterclockwise.

4. according to the axial force balance structure of the described in any item long-shaft pumps of Claims 2 or 3, which is characterized in that the radial direction Lubrication groove is connected to axial lubrication and rounding off.

5. the axial force balance structure of long-shaft pump according to claim 1, which is characterized in that described to balance the transversal of annular groove Face is half arc groove.

6. the axial force balance structure of long-shaft pump according to claim 1, which is characterized in that the pump shaft includes first Spindle, the second coupling spindle and shaft coupling component, the shaft coupling component include first shaft coupling, elastomer block and second shaft coupling, described First shaft coupling is installed on the first coupling spindle, and second coupling spindle is installed on the second coupling spindle, and the elastomer block is respectively with One coupling spindle and the second connection axis connection, have the first gap between the first shaft coupling and second shaft coupling.