CN109538491A - A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer - Google Patents

A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer Download PDF

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Publication number
CN109538491A
CN109538491A CN201811276349.2A CN201811276349A CN109538491A CN 109538491 A CN109538491 A CN 109538491A CN 201811276349 A CN201811276349 A CN 201811276349A CN 109538491 A CN109538491 A CN 109538491A
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CN
China
Prior art keywords
pump
bearing
installation
impeller
inducer
Prior art date
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Granted
Application number
CN201811276349.2A
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Chinese (zh)
Other versions
CN109538491B (en
Inventor
郭晓梅
施高萍
刘学应
潘劲波
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Zhejiang University of Water Resources and Electric Power
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Zhejiang University of Water Resources and Electric Power
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Priority to CN201811276349.2A priority Critical patent/CN109538491B/en
Publication of CN109538491A publication Critical patent/CN109538491A/en
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Publication of CN109538491B publication Critical patent/CN109538491B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/06Lubrication
    • F04D29/061Lubrication especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/086Sealings especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2238Special flow patterns
    • F04D29/225Channel wheels, e.g. one blade or one flow channel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • F04D29/2266Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • F04D29/2272Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • F04D29/2294Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/62Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps

Abstract

The invention discloses a kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer, including the pump housing, pump body is equipped with impeller and bearing, bearing is connected with motor, sealing element is equipped between bearing and motor, bearing is connected with inducer, the outside of inducer is equipped with inlet tube, impeller is uniformly provided on bearing, the top of impeller is uniformly provided with aproll piece, and balancing device is equipped between adjacent fan-wheel, and the inside of the pump housing is equipped with permeable hole and rhone, the bottom of rhone is equipped with outlet pipe, and installation method includes the following steps: the installation of a, centrifugal pump;B, the installation of bearing;C, the installation of inducer;D, time-based maintenance.The problem of present invention solves existing centrifugal pump, and rotational stability is poor in the process of running, is easy to produce " cavitation ".

Description

A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer
Technical field
The invention belongs to centrifugal pump fields, and in particular to a kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer.
Background technique
It is well known that centrifugal pump is usually by impeller, the pump housing, pump shaft, balancing frame, balance ring and stuffing-box are formed, two Above impeller, balancing frame are respectively fitted on pump shaft, and are mounted in the pump housing, and the water inlet end of pump shaft and water outlet are respectively through cylinder Roller bearing is fixedly connected with bearing body, and cylinder roller bearing outer circle outer end is in contact with outer end cap, and inner end offsets with inner end cap Touching, outer end cap pass through the hole that is equipped with of bearing body and are fixedly connected with inner end cap through bolt, nut, and when work, pump shaft is straight by motor Tape splicing is dynamic, and liquid flows successively through every grade of impeller, and series is more, and impeller lift is higher, and there is a fluid intake in pump housing center and inhales Enter pipe connection, liquid enters in pump through bottom valve and suction line, and the liquid outlet on the pump housing is connect with discharge pipe.
When water flow local pressure drops to critical pressure (normally close to pressure for vaporization) in runner, gas core is grown into water Steam bubble, the accumulation of steam bubble flowing, are divided, the general name for the process that crumbles and fall.Past is referred to as " cavitation ".Centrifugal pump during rotation can It is unstable to generate rotation, to generate more bubbles, also influences whether centrifugation pump operation.
Summary of the invention
Above-mentioned technical problem present in present invention aims to solve the prior art provides a kind of with the more of inducer Grade centrifugal pump and its installation method, solving existing centrifugal pump, rotational stability is poor in the process of running, is easy to produce " vapour The problem of erosion ".
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of centrifugal multistage pump multiple centrifugal pump with inducer, including the pump housing, pump body are equipped with impeller and bearing, bearing and impeller Connection, bearing are connected with motor, and motor is located at the outside of the pump housing, it is characterised in that: sealing element is equipped between bearing and motor, it is close Sealing is connect with the pump housing, and bearing is connected with inducer, and the outside of inducer is equipped with inlet tube, and inlet tube is connect with the pump housing, bearing On be uniformly provided with impeller, the top of impeller is uniformly provided with aproll piece, and balancing device is equipped between adjacent fan-wheel, is set on the inside of the pump housing There are permeable hole and rhone, permeable hole is connect with rhone, and the bottom of rhone is equipped with outlet pipe.Being arranged that inducer rises can be to prevent Cavitation is only generated, after making water pump generate cavitation other than it can generate destruction to flow passage components, can also generate noise and vibration It is dynamic, and lead to the performance decline of pump, when serious liquid in pump can interrupt, cisco unity malfunction.Motor provides bearing rotation, close Sealing plays increase sealing function, and impeller is got rid of liquid to permeable hole by aproll piece, and liquid enters draining by permeable hole In slot, and liquid is discharged by outlet pipe, after pump housing internal pressure strong production variation, liquid is pumped into the pump housing by inlet tube.Balance Device plays the revolving speed of uniform bearing, keeps bearing rotation more steady, acceleration and deceleration are more uniform, to increase the stabilization of device Property.The problem of solving existing centrifugal pump, rotational stability is poor in the process of running, is easy to produce " cavitation ".
Further, concentric circles is arranged adjacent aproll piece each other, and aproll piece is obliquely installed, and the angle of aproll piece and impeller is 30 °, aproll piece is cambered structure, and aproll piece is an integral molding structure with impeller.Aproll piece can be such that the water of impeller periphery passes through Aproll piece is flowed to rhone rapidly, so that impeller periphery is generated pressure difference, so that centrifugal pump draws water.
Further, balancing device includes upper interconnecting piece, lower interconnecting piece and buffer unit, and upper interconnecting piece and lower interconnecting piece connect It connects, buffer unit is equipped between upper interconnecting piece and lower interconnecting piece.Interconnecting piece and lower interconnecting piece facilitate the peace of buffer unit in setting Dress.
Further, buffer unit includes separator tube, buffer spring and buffering ball, separator tube respectively with upper interconnecting piece, lower company The inside of separator tube is arranged in socket part connection, buffer spring, and buffer spring is connect with buffering ball, and buffering ball is arranged in upper interconnecting piece Between lower interconnecting piece.Buffer unit is by being arranged buffering ball on separator tube, when bearing rotation, drives buffer unit rotation, It is rotated outward under buffering ball centrifugal action, buffer spring is stretched, and when deceleration makes, is continued under buffering ball effect of inertia Rotation, slowly slows down, and can making bearing, acceleration and deceleration are more steady during rotation, can make impeller during rotation more Steadily.
Further, buffer spring is equipped with attachment base, and separator tube is equipped with threaded hole, and attachment base is threadedly coupled with separator tube.Even Joint chair plays the role of facilitating installation, and the threaded connection that buffer spring and separator tube is arranged increases bonding strength.
Further, it is additionally provided with the first mechanical seal between the pump housing and impeller, the second machine is equipped between impeller and balancing device Tool sealing, the first mechanical seal are connect with bearing, and the second mechanical seal is connect with bearing.First mechanical seal, the second machinery are close Envelope plays the role of increasing leakproofness.
Further, casing is equipped between impeller and bearing, casing is equipped with through-hole, and through-hole is uniformly arranged around casing.Casing With bearing be fixedly installed, between setting through-hole can preferably store lubricating fluid, between impeller and bearing high speed rotation fever after It causes instrument to damage, consumption lubricating oil is used for a long time, and through-hole can effectively store lubricating oil, reduce the addition time of lubricating oil Number.
Further, the bottom of the pump housing is equipped with elastic ring.Elastic ring plays the role of buffering, prevents the pump housing and the pump housing from installing When collide and lead to deformation to influence the stability of wheel rotation.
A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer, it is characterised in that include the following steps:
1) installation of centrifugal pump
A, the installation of balancing device: buffer spring is connect with attachment base, buffer spring is slowly put into attachment base slow In washing pipe, after attachment base reaches bottom, bolt is screwed by threaded hole and attachment base, and lower interconnecting piece is laid flat, lower company Socket part and lower interconnecting piece are provided with the groove for placing separator tube, and mounted separator tube is placed into groove, connection is covered Portion, screw thread are tightened;
2) installation of bearing
A, the first mechanical seal is socketed with bearing, and bearing movement is attached with sealing element;
B, bearing is passed through into the pump housing, sealing element is installed between the pump housing and bearing, be attached, open with motor in outside Installation lid, drags the pump housing away from motor, so that the port of bearing is in the abdominal region of the pump housing, impeller rake angle is put into the pump housing Portion, adjusts in parallel in the pump housing, bearing is passed through casing, and the impeller after installation is elapsed to pump housing inside;
C, by the balancing device installation steps 2 after installation) in step b mode be put into the pump housing, adjustment device Bearing is passed through balancing device by angle, and the balancing device after installation is elapsed to pump body, until touching impeller;
D, the pump housing is mobile to motor, and movement has installed the first mechanical seal, impeller and balancing device simultaneously, presses The second mechanical seal is installed according to the mode of the first mechanical seal, while carrying out the installation of second impeller, mounting means is according to step It is rapid 2) in step b in carry out, after installation, touched with motor by the pump housing is mobile, pump housing elastic ring withstands the structure inside drive It moves together;
3) installation of inducer
A, inducer is threadedly coupled with bearing, then carry out installation lid installation, will installation lid and limiting slot into After row connection, and it is connected through a screw thread and is fixed;
4) time-based maintenance;
Installation lid is opened, lubricating oil periodically is added to casing, and add lubricating oil in the surrounding of bearing.
The present invention is by adopting the above-described technical solution, have the advantages that
1, present invention setting inducer, which rises, can prevent cavitation, in addition to flow passage components meeting after making water pump generate cavitation It generates other than destruction, can also generate noise and vibration, and lead to the performance decline of pump, can make in pump when serious in liquid It is disconnected, cisco unity malfunction.Motor provides bearing rotation, and sealing element plays increase sealing function, and impeller passes through aproll piece for liquid It gets rid of to permeable hole, liquid is entered in rhone by permeable hole, and liquid is discharged by outlet pipe, pump housing internal pressure strong production After variation, liquid is pumped into the pump housing by inlet tube.Balancing device plays the revolving speed of uniform bearing, keeps bearing rotation more steady, Acceleration and deceleration are more uniform, to increase the stability of device.
2, buffer unit of the present invention is by being arranged buffering ball on separator tube, when bearing rotation, drives buffer unit rotation, It is rotated outward under buffering ball centrifugal action, buffer spring is stretched, and when deceleration makes, is continued under buffering ball effect of inertia Rotation, slowly slows down, and can making bearing, acceleration and deceleration are more steady during rotation, can make impeller during rotation more Steadily.
3, aproll piece of the present invention can be such that the water of impeller periphery flows to rhone rapidly by aproll piece, make impeller periphery Pressure difference is generated, so that centrifugal pump draws water, structure is simple, it is easy to use, increase the efficiency drawn water.
4, upper interconnecting piece is arranged in the present invention and lower interconnecting piece facilitates the installation of buffer unit.
5, the principle of the invention is clear, implementation operation is easy, and controls and require generally, easy to spread.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 is a kind of structural schematic diagram of the centrifugal multistage pump multiple centrifugal pump with inducer in the present invention;
Fig. 2 is the structure enlargement diagram in Fig. 1 at A;
Fig. 3 is the attachment structure schematic diagram of aproll piece and impeller in the present invention.
In figure, the 1- pump housing;2- impeller;3- bearing;4- motor;5- inducer;6- inlet tube;7- aproll piece;8- balance dress It sets;9- permeable hole;10- rhone;11- outlet pipe;The upper interconnecting piece of 12-;Interconnecting piece under 13-;14- buffer unit;15- buffering Pipe;16- buffer spring;17- buffering ball;The first mechanical seal of 18-;The second mechanical seal of 19-;20- casing;21- through-hole;22- Attachment base;23- sealing element;24- elastic ring;25- installation lid.
Specific embodiment
It as shown in Figure 1 to Figure 3, is a kind of centrifugal multistage pump multiple centrifugal pump with inducer of the present invention, including the pump housing 1, inside the pump housing 1 Equipped with impeller 2 and bearing 3, bearing 3 is connect with impeller 2, and bearing 3 is connected with motor 4, and motor 4 is located at the outside of the pump housing 1, bearing 3 Sealing element 23 is equipped between motor 4, sealing element 23 is connect with the pump housing 1, and bearing 3 is connected with inducer 5, the outside of inducer 5 Equipped with inlet tube 6, inlet tube 6 is connect with the pump housing 1, and impeller 2 is uniformly provided on bearing 3, and the top of impeller 2 is uniformly provided with aproll piece 7, balancing device 8 is equipped between adjacent fan-wheel 2, the inside of the pump housing 1 is equipped with permeable hole 9 and rhone 10, permeable hole 9 and rhone The bottom of 10 connections, rhone 10 is equipped with outlet pipe 11.
Concentric circles is arranged the adjacent aproll piece 7 of the present invention each other, and aproll piece 7 is obliquely installed, the angle of aproll piece 7 and impeller 2 It is 30 °, aproll piece 7 is cambered structure, and aproll piece 7 is an integral molding structure with impeller 2.Aproll piece 7 can make 2 periphery of impeller Water is flowed to rhone 10 rapidly by aproll piece 7, so that 2 periphery of impeller is generated pressure difference, so that centrifugal pump draws water.Balance Device 8 includes upper interconnecting piece 12, lower interconnecting piece 13 and buffer unit 14, and upper interconnecting piece 12 is connect with lower interconnecting piece 13, upper connection Buffer unit 14 is equipped between portion 12 and lower interconnecting piece 13.Interconnecting piece 12 and lower interconnecting piece 13 facilitate buffer unit 14 in setting Installation.Buffer unit 14 include separator tube 15, buffer spring 16 and buffering ball 17, separator tube 15 respectively with upper interconnecting piece 12, under Interconnecting piece 13 connects, and the inside of separator tube 15 is arranged in buffer spring 16, and buffer spring 16 is connect with buffering ball 17, buffering ball 17 It is arranged between upper interconnecting piece 12 and lower interconnecting piece.Buffer unit is by being arranged buffering ball 17 on separator tube 15, when bearing 3 rotates When, it driving buffer unit 14 to rotate, is rotated outward under 17 centrifugal action of buffering ball, buffer spring 16 is stretched, when Deceleration makes, and continues to rotate under 17 effect of inertia of buffering ball, slowly slows down, and can making bearing 3, acceleration and deceleration are more during rotation Steadily, impeller 2 can be made more steady during rotation.Buffer spring 16 is equipped with attachment base 22, and separator tube 15 is equipped with screw thread Hole (is not marked in figure), and attachment base 22 is threadedly coupled with separator tube 15.Attachment base 22 plays the role of facilitating installation, and setting is slow The threaded connection for rushing spring 16 and separator tube 15 increases bonding strength.The first mechanical seal is additionally provided between the pump housing 1 and impeller 2 18, the second mechanical seal 19 is equipped between impeller 2 and balancing device 8, the first mechanical seal 18 is connect with bearing 3, and second is mechanical Sealing 19 is connect with bearing 3.First mechanical seal 18, the second mechanical seal 19 are played the role of increasing leakproofness.Impeller 2 with Casing 20 is equipped between bearing 3, casing 20 is equipped with through-hole 21, and through-hole 21 is uniformly arranged around casing 20.Casing 20 and bearing 3 are solid Fixed setting, between setting through-hole 21 can preferably store lubricating fluid, caused after high speed rotation fever between impeller 2 and bearing 3 Consumption lubricating oil is used for a long time in instrument damage, and through-hole 21 can effectively store lubricating oil, reduce the addition time of lubricating oil Number.The bottom of the pump housing 1 is equipped with elastic ring 24.Elastic ring 24 plays the role of buffering, hair when preventing the pump housing 1 and the pump housing 1 from installing Raw collision leads to deformation to influence the stability of the rotation of impeller 2.
A kind of centrifugal multistage pump multiple centrifugal pump and its installation method with inducer, includes the following steps:
1) installation of centrifugal pump
A, the installation of balancing device 8: buffer spring 16 is connect with attachment base 22, and buffer spring 16 and attachment base 22 is slow Slow play enters in separator tube 15, and after attachment base 22 reaches bottom, bolt passes through threaded hole (being not marked in figure) and 22 spiral shell of attachment base Line is fixed, and lower interconnecting piece is laid flat, and lower interconnecting piece and lower interconnecting piece are provided with the groove for placing separator tube 15, will be mounted slow Washing pipe 15 was placed into groove (not indicating in figure), covered interconnecting piece, and screw thread is tightened;
2) installation of bearing
A, the first mechanical seal 18 is socketed with bearing 3, and the movement of bearing 3 is attached with sealing element 23;
B, bearing 3 is passed through into the pump housing 1, sealing element 23 is installed between the pump housing 1 and bearing 3, connected in outside with motor 4 It connects, opens installation lid 25, drag the pump housing 1 away from motor 4, the port of bearing 3 is made to be in the abdominal region of the pump housing 1, by 2 oblique angle of impeller Degree is put into inside the pump housing 1, adjusts in the pump housing 1 parallel, and bearing 3 is passed through casing 20, and by the impeller 2 after installation to the pump housing 1 Inside passage;
C, by 8 installation steps 2 of balancing device after installation) in step b mode be put into the pump housing 1, adjustment device 8 Angle, bearing 3 is passed through into balancing device 8, balancing device 8 after installation is to elapsing inside the pump housing 1, until touching impeller 2 's;
D, the pump housing 1 is mobile to motor 4, and the first mechanical seal 18, impeller 2 and the balance of having installed mobile simultaneously fills 8 are set, the second mechanical seal 19 is installed in the way of the first mechanical seal 18, while carrying out the installation of second impeller 2, installation Mode in the step b in step 2) according to carrying out, and after installation, is touched with motor 4 by the pump housing 1 is mobile, 1 elastic ring of the pump housing withstands band Internal structure is moved to move together;
3) installation of inducer 5
A, inducer 5 is threadedly coupled with bearing 3, then carries out the installation of installation lid 25, by installation lid 25 and limit After position slot is attached, and it is connected through a screw thread and is fixed;
4) time-based maintenance;
Installation lid 25 is opened, lubricating oil periodically is added to casing 20, and add lubricating oil in the surrounding of bearing 3.
1, present invention setting inducer 5, which rises, can prevent cavitation, in addition to flow passage components after making water pump generate cavitation It can generate other than destruction, can also generate noise and vibration, and lead to the performance decline of pump, can make in pump when serious in liquid It is disconnected, cisco unity malfunction.Motor 4 provides bearing 3 and rotates, and sealing element 23 plays increase sealing function, and impeller 2 passes through aproll piece 7 Liquid is got rid of to permeable hole 9, liquid is entered in rhone 10 by permeable hole 9, and liquid is discharged by outlet pipe 11, is pumped After 1 internal pressure strong production of body variation, liquid is pumped into the pump housing 1 by inlet tube 6.Balancing device 8 plays the revolving speed of uniform bearing 3, makes The rotation of bearing 3 is more steady, and acceleration and deceleration are more uniform, to increase the stability of device.
2, buffer unit of the present invention, when bearing 3 rotates, drives buffer unit by the way that buffering ball 17 is arranged on separator tube 15 14 rotations, are rotated outward under 17 centrifugal action of buffering ball, and buffer spring 16 is stretched, when deceleration makes, buffering ball 17 It continues to rotate under effect of inertia, slowly slows down, can making bearing 3, acceleration and deceleration are more steady during rotation, can make impeller 2 It is more steady during rotation.
3, aproll piece 7 of the present invention can be such that the water on 2 periphery of impeller flows to rhone 10 rapidly by aproll piece 7, make leaf It takes turns 2 peripheries and generates pressure difference, so that centrifugal pump draws water, structure is simple, it is easy to use, increase the efficiency drawn water.
4, upper interconnecting piece is arranged in the present invention and lower interconnecting piece 13 facilitates the installation of buffer unit 14.
5, the principle of the invention is clear, implementation operation is easy, and controls and require generally, easy to spread.
The above is only specific embodiments of the present invention, but technical characteristic of the invention is not limited thereto.It is any with this hair Based on bright, to solve essentially identical technical problem, essentially identical technical effect is realized, made simple change, etc. With replacement or modification etc., all it is covered by among protection scope of the present invention.

Claims (9)

1. a kind of centrifugal multistage pump multiple centrifugal pump with inducer, including the pump housing, the pump body is equipped with impeller and bearing, the bearing It is connect with the impeller, the bearing is connected with motor, and the motor is located at the outside of the pump housing, it is characterised in that: described Sealing element is equipped between bearing and the motor, the sealing element is connect with the pump housing, and the bearing is connected with inducer, institute The outside for stating inducer is equipped with inlet tube, and the inlet tube is connect with the pump housing, and the bearing top is uniformly provided with the leaf Wheel, the top of the impeller are uniformly provided with aproll piece, balancing device are equipped between the adjacent impeller, is set on the inside of the pump housing There are permeable hole and rhone, the permeable hole is connect with the rhone, and the bottom of the rhone is equipped with outlet pipe.
2. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: the adjacent aproll piece Concentric circles is arranged each other, and the aproll piece is obliquely installed, and the angle of the aproll piece and the impeller is 30 °, the aproll piece For cambered structure, the aproll piece is an integral molding structure with the impeller.
3. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: the balancing device packet Interconnecting piece, lower interconnecting piece and buffer unit are included, the upper interconnecting piece is connect with the lower interconnecting piece, the upper interconnecting piece and institute It states and is equipped with the buffer unit between lower interconnecting piece.
4. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 3, it is characterised in that: the buffer unit packet Separator tube, buffer spring and buffering ball are included, the separator tube is connect with the upper interconnecting piece, lower interconnecting piece respectively, the buffering The inside of the separator tube is arranged in spring, and the buffer spring is connect with the buffering ball, and the buffering ball is arranged described Between upper interconnecting piece and the lower interconnecting piece.
5. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 4, it is characterised in that: the buffer spring is set There is attachment base, the separator tube is equipped with threaded hole, and the attachment base is threadedly coupled with the separator tube.
6. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: the pump housing with it is described It is additionally provided with the first mechanical seal between impeller, the second mechanical seal, first machine are equipped between impeller and the balancing device Tool sealing is connect with the bearing, and second mechanical seal is connect with the bearing.
7. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: the impeller with it is described Casing is equipped between bearing, described sleeve pipe is equipped with through-hole, and the through-hole is uniformly arranged around described sleeve pipe.
8. a kind of centrifugal multistage pump multiple centrifugal pump with inducer according to claim 1, it is characterised in that: the bottom of the pump housing Equipped with elastic ring.
9. a kind of based on a kind of installation method of the centrifugal multistage pump multiple centrifugal pump with inducer described in claim 1, it is characterised in that Include the following steps:
1) installation of centrifugal pump
A, the installation of balancing device: buffer spring is connect with attachment base, and buffer spring and attachment base are slowly put into separator tube In, after attachment base reaches bottom, bolt is screwed by threaded hole and attachment base, and lower interconnecting piece is laid flat, lower interconnecting piece It is provided with the groove for placing separator tube with lower interconnecting piece, mounted separator tube is placed into groove, interconnecting piece, spiral shell are covered Line is tightened;
2) installation of bearing
A, the first mechanical seal is socketed with bearing, and bearing movement is attached with sealing element;
B, bearing is passed through into the pump housing, sealing element is installed between the pump housing and bearing, be attached in outside with motor, open installation Lid, drags the pump housing away from motor, so that the port of bearing is in the abdominal region of the pump housing, impeller rake angle is put into pump body, Adjustment is parallel in the pump housing, bearing is passed through casing, and the impeller after installation is elapsed to pump housing inside;
C, by the balancing device installation steps 2 after installation) in step b mode be put into the pump housing, the angle of adjustment device, Bearing is passed through into balancing device, the balancing device after installation is elapsed to pump body, until touching impeller;
D, the pump housing is mobile to motor, and movement has installed the first mechanical seal, impeller and balancing device simultaneously, according to the The mode of one mechanical seal installs the second mechanical seal, while carrying out the installation of second impeller, and mounting means is according to step 2) In step b in carry out, after installation, touched with motor by the pump housing is mobile, pump housing elastic ring withstands the structure inside drive together It is mobile;
3) installation of inducer
A, inducer is threadedly coupled with bearing, then carries out the installation of installation lid, installation lid is connected with limiting slot After connecing, and it is connected through a screw thread and is fixed;
4) time-based maintenance;
Installation lid is opened, lubricating oil periodically is added to casing, and add lubricating oil in the surrounding of bearing.
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