CN110030193A - Multi-stage shield pump and the water-carriage system for applying it - Google Patents
Multi-stage shield pump and the water-carriage system for applying it Download PDFInfo
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- CN110030193A CN110030193A CN201910409828.5A CN201910409828A CN110030193A CN 110030193 A CN110030193 A CN 110030193A CN 201910409828 A CN201910409828 A CN 201910409828A CN 110030193 A CN110030193 A CN 110030193A
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- rotor
- impeller
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- stage
- bearing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of multi-stage shield pump and the water-carriage system using it, it is related to high lift water-carriage system technical field, the structure has the characteristics that low operational reliability height, vibration, No leakage, Maintenance free and reduces hydraulic loss, can be widely applied for the various water-carriage systems such as recycling or be pressurized.In a kind of multi-stage shield pump, the exhalant canal at water outlet that the lower end cavity of rotor passes through the inner ring runner and impeller of intermediate bearing connects to form high pressure water chamber；The upper end cavity of rotor is by the circulating water passage at the runner of upper end bearing and the center of rotor, and between impeller and next stage impeller and the sub-high pressure stabilization area of guide vane partition composition is connected, to form sub-high pressure water chamber.
Description
Technical field
The present invention relates to high lift water-carriage system technical fields, in particular to a kind of multi-stage shield pump and apply it
Water-carriage system.
Background technique
In order to meet the requirement of the high lift of water-carriage system, centrifugal multistage pump multiple centrifugal pump is generallyd use as power-equipment.And it is more at present
Grade centrifugal pump generallys use mechanical seal or packing seal, fails out when sealing wear inevitably occurs for operation certain time
Existing leakage phenomenon not only influences working environment and generates security risk, but also generates high maintenance cost.It is common simultaneously multistage
The ball bearing of centrifugal pump adapted motor is lubricated using lubricating grease, needs periodically to substantially increase manually to bearing oiling
Maintenance cost in water pump operation, and bearing caused by neglecting because of maintenance period of refueling easily occur and dry grind, or even cause to burn
The major accident of motor.
As user is mute to water pump, the raising of No leakage and the requirements such as non-maintaining, at present in high lift water-carriage system
Gradually have compared with multi-user using multi-stage shield pump as water delivery power-equipment.Current, some canned motor pumps are used from pump discharge height
Pressure water chamber takes highly pressurised liquid, and recirculated water is discharged from axis center hole to suction eye after supercooling motor and lubrication bearing
Method.The shortcomings that this method is the low-pressure area worked as high pressure water and be discharged into suction eye, can generate pole to suction eye water flow
Big interference.High pressure water chamber of this structure at least significant end impeller outlet directly penetrates into chopped-off head using tubule form simultaneously
The suction inlet of impeller makes the direct pressure release of the high pressure generated after multi-stage impeller work done, causes water pump discharge pressure loss big and water pump
Inefficiency.
Also, Most current multi-stage shield pump is using being motor shaft and pump shaft divisional design, although manufacturing
When it is relatively easy, but two shaft assignments are poor, and pump will appear vibration greatly when rotating at high speed and cause motor and pump bearing
The problem of abrasion quickening etc. influences pump operation stability.In addition, the self weight of multi-stage shield pump rotor part and acting on multistage leaf
Axial force at double on wheel so that bearing bears load and be easy to cause very much damage greatly, thus reduce the safety in operation of pump with
Durability.Generally, current multi-stage shield pump technology could be improved.It is improved especially as the requirement to the shielding efficiency of pump,
When selecting canned motor pump with the higher occasion of some pairs of reliability requirements, the technology of existing centrifugal multistage pump multiple centrifugal pump and canned motor pump is transported in pump
The reasonability etc. of capable stability and the Hydraulic Design is difficult to meet user's requirement.
In order to optimize the construction design method of multi-stage shield pump, need to design a kind of new multistage shielding being more suitable
Pump has the characteristics that higher operational reliability, vibrates low, No leakage, Maintenance free and high-efficient, to meet circulation and increasing
The requirements of the various water-carriage systems to multi-stage shield pump such as pressure.
Summary of the invention
The purpose of the present invention is to provide a kind of multi-stage shield pump and using its water-carriage system, in particular to a kind of pump machine
The multi-stage shield pump of the coaxially connected high reliability of one, the structure is high with operational reliability, vibration is low, No leakage, is not necessarily to
It the characteristics of maintenance and reduction hydraulic loss, can be widely applied for the various water-carriage systems such as recycling or be pressurized.
The embodiment of the present invention is achieved in that
A kind of multi-stage shield pump comprising equipped with pump water inlet mouth and the Inlet and outlet water pedestal for pumping out the mouth of a river, the Inlet and outlet water bottom
Seat is connected with first stage impeller, and successively adding up above the first stage impeller has intermediate impeller and impeller；The first stage impeller
Outside is equipped with first-level guide blade, and the outside of the intermediate impeller is equipped with intermediate guide blade, and the outside of the impeller is led equipped with final stage
Leaf；The first-level guide blade, the intermediate guide blade and the final stage guide vane form exhalant canal between resistance to pressure cylinder jointly, and described
The top of exhalant canal is connected with electric machine stand, motor stator and stator can, the intermediate peace of the motor stator by pump cover
Equipped with armature spindle, rotor and rotor shielding sleeve, high pressure water is formed between the rotor shielding sleeve and the stator can
The seal clearance of chamber and sub-high pressure water chamber；The lower end area of the armature spindle installs multi-stage impeller, and the rotor
Center at be equipped with circulating water passage；Inner ring runner and the final stage of the lower end cavity of the rotor by intermediate bearing
The exhalant canal at the water outlet of impeller connects to form the high pressure water chamber；The upper end cavity of the rotor passes through upper
The circulating water passage at the center of the runner of end bearing and the rotor, with the impeller and next stage impeller
Between and guide vane partition constitute sub-high pressure stabilization area be connected, to form the sub-high pressure water chamber.
In preferred embodiments of the present invention, above-mentioned rotor is wrapped up by the rotor shielding sleeve and is fixed on described turn
On sub- axis；The motor stator is wrapped up by the stator can and is fixed in the electric machine stand.
In preferred embodiments of the present invention, above-mentioned rotor, the rotor shielding sleeve and the motor stator and
The stator can is coaxially arranged with motor shaft；The height is formed between the rotor shielding sleeve and the stator can
The seal clearance of water chamber and the sub-high pressure water chamber is pressed, and the seal clearance is 0.05~1.0mm.
In preferred embodiments of the present invention, above-mentioned rotor is by the upper end bearing, the intermediate bearing and lower end
Auxiliary bearing support, and bearing friction pair is constituted using silicon carbide, ceramics or cemented carbide material.
In preferred embodiments of the present invention, being equipped among the axle sleeve and axis of above-mentioned rotor can be automatically swollen with temperature
Bushing that is swollen and reducing.
In preferred embodiments of the present invention, above-mentioned rotor is equipped between thrust plate and thrust plate support can be automatic
The flexible pad of compensation.
In preferred embodiments of the present invention, it is coaxially connected that motor shaft and pump shaft are integrated processing.
In preferred embodiments of the present invention, above-mentioned upper end bearing is equipped with the first groove, and first groove is using straight
Slot or helicla flute；The auxiliary bearing is equipped with the second groove, and second groove uses straight trough or helicla flute.
In preferred embodiments of the present invention, the outer surface of above-mentioned rotor and/or inner surface are equipped with helical duct.
In preferred embodiments of the present invention, above-mentioned high pressure water chamber includes the room high-pressure water chamber B, the sub-high pressure water chamber
Including the room sub-high pressure water cavity B, and the upper and lower end face of the rotor is respectively the room sub-high pressure water cavity B and the high pressure
The room water cavity B.
In preferred embodiments of the present invention, above-mentioned multi-stage shield pump further include: first stage impeller suction inlet and recirculated water go out
The mouth of a river；Liquid from the pump water inlet mouth enters the first stage impeller through the first stage impeller suction inlet；Through the recirculated water
Institute of the downward liquid of runner from the sub-high pressure stabilization area formed between the guide vane partition and the intermediate impeller
State the outflow of recirculated water water outlet.
Herein it should be added that, in multi-stage shield pump provided in an embodiment of the present invention, above-mentioned main water chamber namely
High pressure water chamber, secondary water chamber namely sub-high pressure water chamber；Above-mentioned stabilization area namely sub-high pressure stabilization area.
A kind of water-carriage system comprising multi-stage shield pump as described in any one of the above embodiments.
The beneficial effect of the embodiment of the present invention is:
One, using interior circulating cooling water-bound, the part water flow in high pressure water chamber enters shielding by lower bearing gap
Motor heat is taken away inside motor, and recirculated water chamber is then flowed by upper bearing (metal) gap, passes through recirculated water at rotor bore
It is flowed out from the sub-high pressure stabilization area among impeller and next stage impeller in road；Since circulating water flow water outlet is located at impeller
The stabilization area of lower section will not only interfere water flow, but also circulating water intake and the pressure difference of outlet are very low, can not only cool down
Shield electric machine and lubrication slide up and down bearing, while big pressure difference pressure release will not be caused to be lost to high pressure water chamber, effectively improve water
The efficiency of pump；
Two, seal clearance is formed between rotor shielding sleeve and stator can, is high pressure water chamber, upside on the downside of rotor
For sub-high pressure water chamber, when pumping normal operation, high pressure water chamber will be filled with the highly pressurised liquid after pressurizeing from impeller, should
Pressure acts directly on the downside of rotor, and the top of rotor is sub-high pressure water cavity identical with pressure at first stage impeller suction inlet
Room；The axial force done so used in rotor is upward, can offset part rotor self weight and power axially downwards that multi-stage impeller generates, energy
Effectively mitigate the axial force acted on thrust bearing, to extend the service life of thrust bearing；
Three, secondary silicon carbide, ceramics or the cemented carbide material for using high-hardness, wearable of spring bearing friction of canned motor pump,
Being equipped between axle sleeve and axis can be with the bushing of temperature automatic expansion and diminution, and being also equipped between thrust plate and thrust plate support can
The flexible pad compensated automatically is varied with temperature, substantially reduces the shadow changed because of conveying fluid temperature greatly to axle sleeve and bearing in this way
It rings, improves the scope of application and reliability of pump operation；
Four, it is coaxially connected to be integrated processing for motor shaft and pump shaft, to neutral more preferable, run smoothly with small vibration, safely may be used
It leans on, and structure is more compact.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is that the master of multi-stage shield pump provided in an embodiment of the present invention cuts open structural schematic diagram；
Fig. 2 is the schematic cross-sectional view of the end face A-A in Fig. 1；
Fig. 3 is that the master of sub-high pressure water cavity chamber region in multi-stage shield pump provided in an embodiment of the present invention cuts open structural schematic diagram；
Fig. 4 is that the master of multi-stage shield pump mesohigh water cavity chamber region provided in an embodiment of the present invention cuts open structural schematic diagram.
In figure:
1- Inlet and outlet water pedestal, 2- pump water inlet mouth, 3- first stage impeller suction inlet, 4- first-level guide blade, 5- first stage impeller,
6- auxiliary bearing, 7- intermediate impeller, 8- intermediate guide blade, 9- impeller, 10- final stage guide vane, 11- pump cover, 12- electricity
Machine base, 13- motor stator, 14- stator can, 15- rotor shielding sleeve, 16- circulating water passage, 17- sub-high pressure water
The room chamber A, the upper end 18- bearing, 18a- bushing, 18b- axle sleeve, 18c- thrust plate, 18d- compensation pad, 18e- thrust plate support,
The room 19- sub-high pressure water cavity B, 20- seal clearance, 21- rotor, 22- armature spindle, the room 23- high-pressure water chamber B, in 24-
Between bearing, 25- high pressure water chamber, 26- guide vane partition, 27- sub-high pressure stabilization area, 28- recirculated water water outlet, 29- pressure resistance
Cylinder, 30- exhalant canal, 31- pump out the mouth of a river.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
Fig. 1-Fig. 4 is please referred to, the present embodiment provides a kind of multi-stage shield pumps comprising equipped with pump water inlet mouth 2 and pump out water
The Inlet and outlet water pedestal 1 of mouth 31, Inlet and outlet water pedestal 1 are connected with first stage impeller 5, and 5 top of first stage impeller successively adds up and has intermediate impeller 7
With impeller 9；The outside of first stage impeller 5 is equipped with first-level guide blade 4, and the outside of intermediate impeller 7 is equipped with intermediate guide blade 8, final stage leaf
The outside of wheel 9 is equipped with final stage guide vane 10；First-level guide blade 4, intermediate guide blade 8 and final stage guide vane 10 are formed between resistance to pressure cylinder 29 jointly
Exhalant canal 30, and the top of exhalant canal 30 is connected with electric machine stand 12, motor stator 13 and stator can by pump cover 11
14, the centre of motor stator 13 is equipped with armature spindle 22, rotor 21 and rotor shielding sleeve 15, rotor shielding sleeve 15 and stator
The seal clearance 20 of high pressure water chamber 25 and sub-high pressure water chamber is formed between housing 14；The lower end area of armature spindle 22 is installed
Multi-stage impeller, and circulating water passage 16 is equipped at the center of rotor 21；The lower end cavity of rotor 21 passes through jackshaft
24 inner ring runner is held to connect to form high pressure water chamber 25 with the exhalant canal 30 at the water outlet of impeller 9；Rotor 21
Upper end cavity by the circulating water passage 16 at the center of the runner of upper end bearing 18 and rotor 21, with impeller 9
Between next stage impeller and the sub-high pressure stabilization area 27 of the composition of guide vane partition 26 is connected, to form sub-high pressure water chamber.
In preferred embodiments of the present invention, above-mentioned rotor 21 is wrapped up by rotor shielding sleeve 15 and is fixed on armature spindle
On 22；Above-mentioned motor stator 13 is wrapped up by stator can 14 and is fixed in electric machine stand.
In preferred embodiments of the present invention, above-mentioned rotor 21, rotor shielding sleeve 15 and motor stator 13 and fixed
Sub- housing 14 is coaxially arranged with motor shaft；Also, high-pressure water chamber is formed between rotor shielding sleeve 15 and stator can 14
The seal clearance 20 of room 25 and sub-high pressure water chamber, the seal clearance 20 are 0.05~1.0mm.
Using interior circulating cooling water-bound, the part water flow in high pressure water chamber enters shield electric machine by lower bearing gap
Motor heat is taken away in inside, then by upper bearing (metal) gap flow into recirculated water chamber, by cyclic water channel at rotor bore from
Sub-high pressure stabilization area outflow among impeller and next stage impeller；Since circulating water flow water outlet is located at below impeller
Stabilization area, water flow will not only be interfered, but also circulating water intake and the pressure difference of outlet are very low, can not only cool down shielding
Motor and lubrication slide up and down bearing, while big pressure difference pressure release will not be caused to be lost to high pressure water chamber, effectively improve water pump effect
Rate.
It is high pressure water chamber on the downside of rotor, thereon in addition, forming seal clearance between rotor shielding sleeve and stator can
Side is sub-high pressure water chamber, and when pumping normal operation, high pressure water chamber will be filled with the highly pressurised liquid after pressurizeing from impeller,
The pressure acts directly on the downside of rotor, and the top of rotor is sub-high pressure water identical with pressure at first stage impeller suction inlet
Chamber；The axial force done so used in rotor is upward, can offset part rotor self weight and power axially downwards that multi-stage impeller generates,
The axial force acted on thrust bearing can effectively be mitigated, to extend the service life of thrust bearing.
In preferred embodiments of the present invention, above-mentioned rotor 21 is by upper end bearing 18, intermediate bearing 24 and lower end
Auxiliary bearing 6 supports, and bearing friction pair is constituted using the silicon carbide, ceramics or cemented carbide material of high-hardness, wearable.
In preferred embodiments of the present invention, being equipped among the axle sleeve 18b and axis of above-mentioned rotor 21 can be with temperature
The bushing 18a of automatic expansion and diminution.
In preferred embodiments of the present invention, above-mentioned rotor 21 is equipped between thrust plate 18c and thrust plate support 18e
The flexible pad 18d that can be compensated automatically.
Secondary silicon carbide, ceramics or the cemented carbide material for using high-hardness, wearable of spring bearing friction of canned motor pump,
Equipped with can be with the bushing of temperature automatic expansion and diminution between axle sleeve and axis, being also equipped between thrust plate and thrust plate support can be with
The flexible pad of automatic temperature change compensation substantially reduces the shadow changed because of conveying fluid temperature greatly to axle sleeve and bearing in this way
It rings, improves the scope of application and reliability of pump operation.
In preferred embodiments of the present invention, it is coaxially connected that upper motor shaft and pump shaft are integrated processing, thus to neutrality
More preferably, it runs smoothly, is with small vibration, securely and reliably, and structure is more compact.
In preferred embodiments of the present invention, above-mentioned upper end bearing 18 can be equipped with the first groove, and first groove can
To use straight trough or helicla flute；Above-mentioned auxiliary bearing 6 can be equipped with the second groove, and second groove can use straight trough or spiral shell
Spin slot.
In preferred embodiments of the present invention, the outer surface of above-mentioned rotor 21 and/or inner surface can be equipped with spiral
Channel.
The setting of straight trough or helicla flute and helical duct can more effectively take away the heat more generated by motor
Amount.
In preferred embodiments of the present invention, above-mentioned high pressure water chamber 25 includes the room high-pressure water chamber B 23, above-mentioned sub-high pressure water
Chamber includes the room sub-high pressure water cavity B 19, and the upper and lower end face of rotor 21 is respectively the room sub-high pressure water cavity B 19 and the height
The room water cavity B 23 is pressed, so as to form the pressure difference of rotor upper and lower ends；When pump operation, the differential pressure action is on rotor
Axial force it is upward, can offset significant portion rotor self weight and multi-stage impeller generate power axially downwards, mitigation thrust can be reached
Bearing load and the effect for reducing bearing wear, to extend the service life of bearing.
In preferred embodiments of the present invention, above-mentioned multi-stage shield pump further include: first stage impeller suction inlet 3 and recirculated water go out
The mouth of a river 28；Liquid from pump water inlet mouth 2 can enter first stage impeller 5 through first stage impeller suction inlet 3；In addition, through circulating water flow
The downward liquid in road 16 can be from the recirculated water of the sub-high pressure stabilization area 27 formed between guide vane partition 26 and intermediate impeller 7
Water outlet 28 flows out.
The course of work of multi-stage shield pump provided in an embodiment of the present invention is described in detail with reference to the accompanying drawing:
Liquid from pump water inlet mouth 2 enters first stage impeller 5 through first stage impeller suction inlet 3, flows into after liquid is pressurized first
Grade guide vane 4；Then secondary intermediate impeller 7 and intermediate guide blade 8 are flowed into, is pressurizeed layer by layer, is finally flowed through impeller 9 and final stage is led
Leaf 10 reaches high pressure water chamber 25；In addition to a small amount of liquid at intermediate bearing 24 by entering inside motor, most part liquid
It will be flowed to through exhalant canal 30 and pump out the mouth of a river 31.
There is very least a portion of liquid from high pressure water chamber 25, it is laggard to lubricate bearing by the water stream channel of intermediate bearing 24
Enter in the room high-pressure water chamber B 23 inside motor, then some liquid by rotor shielding sleeve 15 and stator can 14 it
Between seal clearance, heat exchange, which is taken away, to be entered in the room sub-high pressure water cavity B 19 after motor heat, and the water of upper end bearing 18 is then passed through
Circulation road flows into the room sub-high pressure water cavity A 17 after lubricating bearing, downward by the circulating water passage 16 at 22 center of armature spindle later；Most
Eventually, it is flowed out from the recirculated water water outlet 28 for forming sub-high pressure stabilization area 27 between guide vane partition 26 and intermediate impeller 7.
Since the upper and lower end face of rotor 21 is respectively the room sub-high pressure water cavity B 19 and the room high-pressure water chamber B 23, such shape
At the pressure difference of rotor upper and lower ends；When pump operation, axial force of the differential pressure action on rotor is upward, can offset
The power axially downwards that the self weight of significant portion rotor and multi-stage impeller generate can reach and mitigate thrust-bearing load and reduce Bearing Grinding
The effect of damage, to extend the service life of bearing.
Rotor portion is supported by the auxiliary bearing 6 of upper end bearing 18, intermediate bearing 24 and lower end, upper end bearing 18 and centre
The bearing friction pair of bearing 24 uses silicon carbide, ceramics or the cemented carbide material of high-hardness, wearable, in axle sleeve 18b and rotor
Being equipped between axis 22 can be with the bushing 18a of temperature automatic expansion and diminution, equally between thrust plate 18c and thrust plate support 18e
It is also equipped with the flexible compensation pad 18d that can be compensated automatically；It can be with temperature by this installed between ceramic-like axle sleeve and metal body
The method for spending the component compensated automatically, makes it possible that this high abrasion resisting material is used on multi-stage shield pump, not only greatly prolongs
The running life of pump, and the transfusion temperature range of pump can be made to greatly expand.
A kind of water-carriage system comprising multi-stage shield pump as described in any one of the above embodiments.
In conclusion multi-stage shield pump provided in an embodiment of the present invention and water-carriage system, mainly have following advantage:
One, motor cooling circulating water inlet outlet pressure differential very little, the pressure loss very little caused by pump outlet；
Two, the power axially downwards that the original generation in part can be offset using the upward pressure that rotor upper and lower end face is formed, from
And the load for mitigating bearing extends the service life of bearing；
Three, bearing use high-hardness, wearable silicon carbide, ceramics or cemented carbide material, by ceramic-like axle sleeve with
Between metal body installation can with the component of temperature self-compensation, make this high abrasion resisting material use on multi-stage shield pump become can
Can, the running life of pump is not only greatly prolonged, but also the transfusion temperature range of pump can be made to greatly expand.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of multi-stage shield pump characterized by comprising described equipped with pump water inlet mouth and the Inlet and outlet water pedestal for pumping out the mouth of a river
Inlet and outlet water pedestal is connected with first stage impeller, and successively adding up above the first stage impeller has intermediate impeller and impeller；The head
The outside of grade impeller is equipped with first-level guide blade, and the outside of the intermediate impeller is equipped with intermediate guide blade, the external dress of the impeller
There is final stage guide vane；
The first-level guide blade, the intermediate guide blade and the final stage guide vane form exhalant canal, and institute between resistance to pressure cylinder jointly
The top for stating exhalant canal is connected with electric machine stand, motor stator and stator can, the centre of the motor stator by pump cover
Armature spindle, rotor and rotor shielding sleeve are installed, form main water between the rotor shielding sleeve and the stator can
The seal clearance of chamber and time water chamber；The lower end area of the armature spindle installs multi-stage impeller, and in the rotor
Circulating water passage is equipped at the heart；
The lower end cavity of the rotor by the inner ring runner of intermediate bearing with it is described at the water outlet of the impeller
Exhalant canal connects to form the main water chamber；The upper end cavity of the rotor passes through the runner and the electricity of upper end bearing
The circulating water passage at the center of machine rotor, between the impeller and next stage impeller and guide vane partition is constituted
Stabilization area be connected, to form the secondary water chamber.
2. multi-stage shield pump according to claim 1, which is characterized in that the rotor is by the rotor shielding sleeve packet
It wraps up in and is fixed on the armature spindle；
The motor stator is wrapped up by the stator can and is fixed in the electric machine stand.
3. multi-stage shield pump according to claim 1 or 2, which is characterized in that the rotor, the rotor shielding sleeve
And the motor stator and the stator can it is coaxially arranged with motor shaft；
The described close of the main water chamber and the secondary water chamber is formed between the rotor shielding sleeve and the stator can
Gap is sealed, and the seal clearance is 0.05~1.0mm.
4. multi-stage shield pump according to claim 1, which is characterized in that the rotor is by the upper end bearing, institute
The auxiliary bearing support of intermediate bearing and lower end is stated, and bearing friction pair is constituted using silicon carbide, ceramics or cemented carbide material.
5. multi-stage shield pump according to claim 4, which is characterized in that be equipped among the axle sleeve and axis of the rotor
Bushing.
6. multi-stage shield pump according to claim 4 or 5, which is characterized in that the rotor is in thrust plate and thrust
Equipped with the flexible pad that can be compensated automatically between plate support.
7. multi-stage shield pump according to claim 1, which is characterized in that motor shaft and pump shaft are integrated processing and coaxially connect
It connects.
8. multi-stage shield pump according to claim 4, which is characterized in that the upper end bearing is equipped with the first groove, and institute
The first groove is stated using straight trough or helicla flute；
The auxiliary bearing is equipped with the second groove, and second groove uses straight trough or helicla flute.
9. multi-stage shield pump according to claim 1 or 8, which is characterized in that the outer surface of the rotor and/or interior
Surface is equipped with helical duct.
10. a kind of water-carriage system characterized by comprising such as above-mentioned Multistage shielding of any of claims 1-9
Pump.
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| CN201910409828.5A CN110030193A (en) | 2019-05-16 | 2019-05-16 | Multi-stage shield pump and the water-carriage system for applying it |
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| CN201910409828.5A CN110030193A (en) | 2019-05-16 | 2019-05-16 | Multi-stage shield pump and the water-carriage system for applying it |
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| CN110030193A true CN110030193A (en) | 2019-07-19 |
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| CN108730195A (en) * | 2018-06-07 | 2018-11-02 | 浙江华泰电子有限公司 | Wind-force generating converter Special punching welds multi-stage shield pump |
| CN111810439A (en) * | 2020-08-18 | 2020-10-23 | 大连海密梯克泵业有限公司 | Anti-dead-bearing structure of serial multistage pump sliding bearing and multistage canned motor pump |
| CN112460031A (en) * | 2019-11-28 | 2021-03-09 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
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Effective date of registration: 20220208 Address after: 200000 Building 2, No. 777, Songhui Road, Qingpu District, Shanghai Applicant after: LANCO pump (Shanghai) Co.,Ltd. Address before: No.777, Songhui Road, Zhaoxiang Town, Qingpu District, Shanghai, 201700 Applicant before: SHANGHAI CHUANGKE PUMP MANUFACTURING CO.,LTD. |
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