CN107559206A - First-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump - Google Patents
First-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump Download PDFInfo
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- CN107559206A CN107559206A CN201710950670.3A CN201710950670A CN107559206A CN 107559206 A CN107559206 A CN 107559206A CN 201710950670 A CN201710950670 A CN 201710950670A CN 107559206 A CN107559206 A CN 107559206A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 23
- 238000013461 design Methods 0.000 claims description 21
- 238000010079 rubber tapping Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The present invention provides a kind of first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump, it includes outer cylinder body, the left and right ends of the outer cylinder body are equipped with suction side stuffing box body, pump cover by sealing structure respectively, and the outer cylinder body intermediate coaxial is equipped with central shaft；The core pack assembly being equipped with the central shaft in installation cavity on the outer cylinder body, the core pack assembly form three annular housings by closing shoulder with the outer cylinder body inwall, and three annular housings are from left to right followed successively by suction chamber, discharge chamber, adapter cavity；The core pack assembly includes the first section being from left to right sequentially connected, stage casing, latter end, the first section, stage casing, latter end inner chamber in be respectively fitted with first impeller, middle impeller, last years wheel that annular is fixed on the central shaft.The pump improves the anti-cavitation performance of centrifugal pump, by the secondary impeller arranged back-to-back, the axial force of multistage pump rotatable parts is realized self-balancing, safer.
Description
Art
The invention belongs to centrifuge pump technical field, radially cutd open more particularly, to a kind of first-stage double-absorption structure Double-casing symmetrical expression
Divide centrifugal multistage pump multiple centrifugal pump.
Background technology
Centrifugal pump refers to lean on centrifugal force caused by impeller rotation to convey the pump of liquid, and centrifugal pump is carrying out centrifugation transfusion
When, centrifugal pump can produce cavitation phenomenons at work, and the fluid that cavitation refers to flow produces vapour due to the reduction of local pressure
The phenomenon of bubble.Cavitation occurs for pump, can cause the erosion of parts at cavitation position, and further development will then cause lift to decline, and produce
Raw vibration noise.Adverse consequences caused by order to solve cavitation, user is when carrying out the global design of field device, it is necessary to every
One centrifugal pumping apparatus used all design one must net positive suction head (being also net suction head) required value.So allow for
Centrifugal pump, it is necessary to have certain height, so can not only waste more material when being assembled, at the same can also cause from
Heart pump is not sufficiently stable.When rationality pump designs, when the impeller of single suction entrance can not meet that this is required, it is necessary to design in pairs
Inhale the impeller of structure.The impeller of double suction structure sucks liquid by the suction inlet that is arranged symmetrically, and liquid is converged to throwing away together,
Secondary impeller is imported into by chopped-off head stage casing again.Double entry pump has higher lift, bigger flow.And traditional secondary impeller
Torsion is all delivered in installation axle at work, and traditional centrifugal pump is designed with balancing drum dish structure for balancing axial thrust, this
Sample not only increases the complexity of centrifugal pump, and balance drum can produce abrasion at work, bring larger safety hidden
Suffer from.
The content of the invention
For it is above-mentioned the problem of, it is an object of the invention to provide a kind of first-stage double-absorption structure Double-casing symmetrical expression radially to cut open
Divide centrifugal multistage pump multiple centrifugal pump, it can improve the anti-cavitation performance of centrifugal pump so that the construction height of user's field device can be appropriate
Reduce, and the secondary impeller by arranging back-to-back, the axial force of multistage pump rotatable parts is realized self-balancing, cancel balance
Drum structure, reduce potential safety hazard.
The technical solution adopted for the present invention to solve the technical problems is：The first-stage double-absorption structure Double-casing symmetrical expression is radially
Subdivision centrifugal multistage pump multiple centrifugal pump includes outer cylinder body, and the outer cylinder body is horizontal positioned cylindrical shape, is processed inside the outer cylinder body
There is horizontal installation cavity, the left and right ends of the outer cylinder body are equipped with suction side stuffing box body, pump cover by sealing structure respectively,
The outer cylinder body intermediate coaxial is equipped with central shaft, and the both ends of the central shaft are respectively from the suction side stuffing box body, pump cover
It is middle protruding, the central shaft and the coaxially rotatable assembling of the suction side stuffing box body, pump cover；Filled on the central shaft
Equipped with the core pack assembly on the outer cylinder body in installation cavity, the indoor design of the outer cylinder body has two ring-types and outer barrel
The closing shoulder that internal wall is fixed, the outside of the core pack assembly pass through envelope with the closing shoulder seal assembling, the core pack assembly
Close shoulder and the outer cylinder body inwall and form three annular housings, three annular housings be from left to right followed successively by suction chamber, discharge chamber,
Adapter cavity；Two suction lines being connected respectively with the suction chamber, discharge chamber, discharge pipes are designed with the outer cylinder body；Institute
State core pack assembly and include the first section being from left to right sequentially connected, stage casing, latter end, the first section, stage casing, set respectively inside latter end
In respect of around the central shaft inner chamber, the first section, stage casing, latter end inner chamber in be respectively fitted with annular be fixed on it is described in
First impeller, middle impeller, last years wheel in mandrel；First impeller feed liquor position in the first section inner chamber is connected with the suction chamber
Logical, the middle impeller feed liquor position in the stage casing inner chamber is connected with the first impeller drain position in the first section inner chamber, described
Middle impeller drain position in the inner chamber of stage casing is connected with the adapter cavity, the adapter cavity and the last years in the latter end inner chamber
Wheel feed liquor position is connected, and the last years wheel drain position in the latter end inner chamber is connected with the discharge chamber；The middle impeller
Assembling back-to-back is taken turns with the last years, i.e., stress of the middle impeller with last years wheel on the central shaft is opposite to assemble, described
First impeller is double-entry impeller, and the first impeller both sides feed liquor position in the first section inner chamber is connected with the suction chamber respectively.
The first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump is mainly used to after being extracted to liquid
Pressurization output, the operation principle of the pump are：Fluid media (medium) is entered in the suction chamber by the suction line on outer cylinder body, is passed through
The first impeller of first section double suction structure is thrown away into the inner chamber in the stage casing sucked from its both sides simultaneously after, and the runner through stage casing enters
Enter to middle impeller, middle impeller and fluid is thrown away and enters the adapter cavity by runner, then enter latter end via adapter cavity
In inner chamber, then taken turns via last years and imported into discharge chamber, finally exported via discharge chamber from discharge pipe.
Preferably, the outer cylinder body is structure as a whole, the core pack assembly is formed by assembling parts, and the outer cylinder body is right
The opening diameter of side is more than the maximum gauge of the core pack assembly.
Preferably, the discharge pipe is vertically to the top that the outer cylinder body is assemblied in perpendicular to central shaft, the suction
Pipe level is assemblied in the rear portion for stating outer cylinder body to perpendicular to central shaft.
Preferably, the stage casing of the core pack assembly is designed with the inner chamber that two or more surround central shaft, in described
End to end middle impeller is respectively fitted with each inner chamber of section, the latter end of the core pack assembly is designed with two or more in
The inner chamber of mandrel, is respectively fitted with end to end last years wheel in each inner chamber of the latter end, the inner chamber in the stage casing with
The inner chamber number of latter end is identical.
Preferably, the stage casing and latter end include two inner chambers.
Preferably, the first impeller is interference fitted with central shaft, the middle impeller, last years wheel are matched somebody with somebody with center shaft clearance
Close.
Preferably, two suctions being connected respectively with the suction chamber, discharge chamber are also devised with the outer cylinder body
Looped pipeline, discharge looped pipeline.
Preferably, the suction bore is more than the discharge bore.
Preferably, the stage casing of the core pack assembly includes middle baffle, the middle baffle is cylindrical shape,
Connection stage casing inner chamber and the feeding-passage of the adapter cavity are designed with the middle baffle, is also set on the middle baffle
In respect of connection latter end inner chamber and the tapping channel of the discharge chamber；The feeding-passage, the number of tapping channel be two with
Upper relative, the axis of relatively described middle baffle is uniform.
Preferably, the first section of the core pack assembly includes segment in chopped-off head, the inner chamber of the first section is designed described
In chopped-off head in segment, it is centrosymmetric spiral to be designed with two relative axis on the right side of its inner chamber for segment in the chopped-off head
Chopped-off head feed liquor runner, the external port of two chopped-off head feed liquor runners are connected with the suction chamber, described two chopped-off heads
Feed liquor position of the inner port of feed liquor runner respectively with first impeller both sides is connected.
Preferably, being equipped with initial workpiece left cover in the chopped-off head on the left of segment, the initial workpiece left cover passes through bolt and head
Segment is connected in level, and flow passage structure is designed with the initial workpiece left cover.
Preferably, the core bag adjusting pad that passes on left of the core pack assembly holds out against with the pump cover on right side and contacted, the core
Bag adjusting pad is the spiral wound gaskets of one group of controllable decrement.
The beneficial effects of the present invention are：The first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump uses
Centrifugal principle designs, and forms multistage centrifugation drive mechanism by first impeller, middle impeller, last years wheel, so that the pump is to liquid
The output pressure of body is bigger, meanwhile, the pump directly constitutes multiple runners by core pack assembly and two shell structures of outer cylinder body, just
In the inflow that flows into of liquid, and liquid is in the flowing of each section of inner chamber of core pack assembly., can be with this greatly simplifies pump body structure
Effectively prevent cavitation；The outer cylinder body can be designed to an overall structure, the core package by this structure simultaneously
Part can split out or load from outer cylinder body as an entirety.First impeller in this pump first section inner chamber is double suction structure, axial force
Symmetrical, middle impeller and last years wheel are arranged back-to-back for two groups, the self-balancing of axial force can be achieved, it is not necessary on the pump housing again
Drum structure is designed, effectively reduces the volume of the pump housing.The pump configuration is rationally reliable, energy-efficient.
Brief description of the drawings
Fig. 1 is the structural representation of first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump forward direction section.
Fig. 2 is the structural representation of outer cylinder body overlook direction.
Fig. 3 is the structural representation in outer cylinder body left view direction.
Fig. 4 is the structural representation of middle baffle direction section.
Fig. 5 is the left view structural representation of middle baffle.
Fig. 6 is the structural representation of segment forward direction section in chopped-off head.
Fig. 7 is the structural representation in segment left view direction in chopped-off head.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples：
As shown in the embodiment shown in fig, this first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump includes
Outer cylinder body 1, the outer cylinder body 1 are horizontal positioned cylindrical shape, and horizontal installation cavity, institute are machined with inside the outer cylinder body 1
State the left and right ends of outer cylinder body 1 and suction side stuffing box body 2, pump cover 3 are equipped with by sealing structure respectively, in the outer cylinder body 1
Between be coaxially equipped with central shaft 4, the both ends of the central shaft 4 respectively among the suction side stuffing box body 2, pump cover 3 outwards
Stretch out, the central shaft 4 and the coaxially rotatable assembling of the suction side stuffing box body 2, pump cover 3；Equally installed on the pump cover 3
There is exhaust end stuffing box body, the central shaft 4 passes through from the exhaust end stuffing box body, and the letter body of left and right two can be in described
Mandrel 4 carries out Horizontal limiting, ensures the sealing sliding contact of the outer wall of trunnion axis 4 and the pump left and right sides.
The core pack assembly 5 being equipped with the central shaft 4 in installation cavity on the outer cylinder body 1, the outer cylinder body 1
Indoor design has the closing shoulder 11 fixed with outer cylinder body inwall of two ring-types, outside and the closing of the core pack assembly 5
The sealing assembling of shoulder 11, the core pack assembly 5 form three annular housings by closing shoulder 11 and the inwall of outer cylinder body 1, three
Annular housing is from left to right followed successively by suction chamber 12, discharge chamber 13, adapter cavity 14；Two difference are designed with the outer cylinder body 1
Suction line 15, the discharge pipe 16 being connected with the suction chamber 12, discharge chamber 13；The suction line 15, discharge pipe 16 are using
When be connected respectively with water influent pipeline and drain pipe road.
The core pack assembly 5 includes the first section 51 being from left to right sequentially connected, stage casing 52, latter end 53, the first section 51,
Be respectively designed with the inner chamber around the central shaft 4 inside stage casing 52, latter end 53, the first section 51, stage casing 52, latter end 53 it is interior
First impeller 41, middle impeller 42, last years wheel 43 that annular is fixed on the central shaft 4 are respectively fitted with chamber；The first section 51
The feed liquor position of first impeller 41 in inner chamber is connected with the suction chamber 12, and the middle impeller 42 in the inner chamber of stage casing 52 enters liquid level
Put and be connected with the drain position of first impeller 41 in the inner chamber of first section 51, the middle impeller 42 in the inner chamber of stage casing 52 goes out liquid level
Put and be connected with the adapter cavity 14, the adapter cavity 14 is taken turns 43 feed liquor positions with the last years in the inner chamber of latter end 53 and is connected
Logical, the last years in the inner chamber of latter end 53 take turns 43 drain positions and are connected with the discharge chamber 13；The middle impeller 42 with it is described
The assembling back-to-back of last years wheel 43, i.e., in impeller 42 and the last years take turns that 43 stress on the central shaft is opposite to assemble, it is described
First impeller 41 is double-entry impeller, the both sides feed liquor position of first impeller 41 in the inner chamber of first section 51 respectively with the phase of suction chamber 12
Connection.
The first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump is mainly used to after being extracted to liquid
Pressurization output, the operation principle of the pump are：As illustrated by the arrows in fig. 1, during this work, fluid media (medium) passes through on outer cylinder body 1
Suction line 15 enter in the suction chamber 12, the first impeller 41 by the double suction structure of first section 51 from its both sides simultaneously suck after
In the inner chamber for throwing away the stage casing 52, and the runner through stage casing 52 enters middle impeller 42, middle impeller 42 by fluid throw away through
Cross runner and enter the adapter cavity 14, then enter via adapter cavity 14 in the inner chamber of latter end 53, then led via last years wheel 43
Enter to discharge chamber 13, finally exported via discharge chamber 13 from discharge pipe 16.So the pump just completes the suction pressurization of convection body
Output procedure.
The pump is designed using centrifugal principle on the whole, by first impeller 41, middle impeller 42, last years wheel 43 form it is multistage from
Heart drive mechanism, so that the pump is bigger to the output pressure of liquid, meanwhile, the pump passes through in core pack assembly 5 and outer cylinder body 1
Wall directly constitutes 14 3 suction chamber 12, discharge chamber 13, adapter cavity runners, and be easy to liquid flows into inflow, and liquid in core
The flowing of 5 each sections of inner chambers of pack assembly.This greatly simplifies pump body structure, can effectively prevent cavitation；This knot simultaneously
The outer cylinder body 1 can be designed to an overall structure by structure, and the core pack assembly 5 can be used as an entirety from outer cylinder body
Split out or load.First impeller 41 in the inner chamber of this pump first section 51 is double suction structure, and axial force is symmetrical, middle impeller 42 and last years
Wheel 43 is two groups and arranged back-to-back, and the self-balancing of axial force can be achieved, it is not necessary to drum structure, effectively drop are redesigned on the pump housing
Low pump housing volume.The pump configuration is rationally reliable, energy-efficient.
In design, as shown in figure 1, the outer cylinder body 1 of the pump is structure as a whole, forging structure, the support side of housing
Formula is that nearly center line horizontal support can make pump pin rational in infrastructure when being welded with outer cylinder body, easy to operation.The core pack assembly 5
Formed by multiple assembling parts, each part is mutually combined so that the core pack assembly 5 forms its need on the central shaft 4
The liquid chamber body wanted.The opening diameter on the right side of outer cylinder body 1 is more than the maximum gauge of the core pack assembly 5.So it is easy to institute
Core pack assembly 5 is stated to be directly inserted into inside the outer cylinder body 1.
In specific design, as shown in Figures 2 and 3, the discharge pipe 16 is described to being assemblied in perpendicular to central shaft 4 vertically
The top of outer cylinder body 1, the suction line 15 is horizontal to be assemblied in the rear portion for stating outer cylinder body 1 to perpendicular to central shaft 4.The suction
Enter pipe 15 and discharge pipe 16 not to be easy to assemble in a plane, while discharge pipe 16 is arranged vertically upward, can make pump in lift
Meet pipeline arrangement requirement under relatively low or few series operating mode.
In specific design, the stage casing of the core pack assembly 5 can be designed with two or more around the described interior of central shaft 4
Chamber, end to end middle impeller 42 is respectively fitted with each inner chamber in the stage casing 52, the latter end 53 of the core pack assembly 5 designs
There is two or more to be respectively fitted with end to end last years in the inner chamber of central shaft 4, each inner chamber of the latter end 53
Wheel 43, the inner chamber in the stage casing 52 is identical with the inner chamber number of latter end 53.So allow and distinguish in stage casing 52 and latter end 53
Multilevel transmission structure is designed, and 43 structures are taken turns using end to end middle impeller 42 or last years in same section, is easy to cavity knot
The design of structure, while the pump is by the stress balance that central shaft 4 is designed by backrest of two groups of multistage pump drive mechanisms, so
Not only so that the pump operation is steady, while greatly improve its job design.In the present embodiment, as shown in figure 1, the stage casing 52
Include two inner chambers with latter end 53.Stage casing 52 and two inner chambers of latter end 53 are respectively equipped with two middle impellers 42 and end respectively
Impeller 43, i.e., described stage casing 52 and latter end 53 are respectively designed with the pump drive structure of two-stage, plus the double suction pump configuration of first section, this
The centrifugal pump structure of Pyatyi is used in sample embodiment altogether so that the discharge pipe 16 of outer cylinder body 1 there can be enough lifts, together
The interior diameter of Shi Suoshu suction lines 15 is more than the interior diameter of discharge pipe 16, so can ensure the pump at work, liquid suction
It is enough.
In specific design, the first impeller 41 is interference fitted with central shaft 4, and the middle impeller 42, last years wheel 43 are with
The gap of mandrel 4 coordinates.As shown in figure 1, the first impeller 41 loads from the left side of central shaft 4, secondary impeller 42 and axle are gap
Coordinate, load step by step from the right side of central shaft 4, each impeller is to position step by step on central shaft 4.
In specific design, as shown in figure 1, be also devised with the outer cylinder body 1 two respectively with the suction chamber 12, tell
Go out suction looped pipeline 17, the discharge looped pipeline 18 that chamber 13 is connected.The suction looped pipeline 17, the diameter of discharge looped pipeline 18 are respectively less than described
Suction line 15, discharge pipe 16, people can come when looped pipeline 17, discharge looped pipeline 18 connect other devices such as pressure measurement in the pump operation
The suction chamber 12, the pressure condition of discharge chamber 13 are detected, can also be when this pump goes wrong, by suction chamber 12, discharge chamber
13 pressure discharges from suction looped pipeline 17, discharge looped pipeline 18.When by suction line 15, discharge pipe 16 go wrong closing after, institute
Stating suction looped pipeline 17, discharge looped pipeline 18 can be connected with suction line and outlet pipeline respectively, continue use of drawing water.
In specific design, as shown in Figure 1, Figure 4 and Figure 5, the stage casing 52 of the core pack assembly 5 includes middle baffle
521, the middle baffle 521 is cylindrical shape, be designed with the middle baffle 521 connection the inner chamber of stage casing 52 with it is described
The feeding-passage 522 of adapter cavity 14, it is also devised with the middle baffle 521 connecting the inner chamber of latter end 53 and the discharge chamber 13
Tapping channel 523；The feeding-passage 522, the number of tapping channel 523 are that two or more is relative, relatively described centre
The axis of baffle 521 is uniform.The design of the middle baffle 521 can substantially reduce assembling and the difficult processing of other parts
Degree, while the feeding-passage 522, the multi-passage design of tapping channel 523 so that this pump is not susceptible to block at work.
And the relatively described central shaft 4 of feeding-passage 522, tapping channel 523 is symmetrical so that the core during liquid flowing
The stress of pack assembly 5 is more balanced, and vibrations are smaller, and service life is longer.
As shown in Fig. 1, Fig. 6 and Fig. 7, the first section 51 of the core pack assembly 5 includes segment 511 in chopped-off head, the first section
51 inner chamber is designed in the chopped-off head in segment 511, and segment 511 is designed with two phases on the right side of its inner chamber in the chopped-off head
To the symmetrical spiral chopped-off head feed liquor runner 512 of axis centre, the external port of two chopped-off head feed liquor runners 512 with it is described
Suction chamber 12 is connected, and the inner ports of described two chopped-off head feed liquor runners 512 enters liquid level with the first both sides of impeller 41 respectively
Put and be connected.The pump at work, in the suction chamber 12 liquid by two balance runners of segment in level 511 from right side
Collar extension enters, and when being flowed into close to 4 position of central shaft, the left side of first impeller 41 is flowed into from the liquid in a runner, is made
Obtain liquid to suck from first impeller both sides, complete double suction process, can during spiral dual channel structure make it that liquid enters
Make pump radially force self-balanced in the running.
In specific design, as shown in figure 1, the left side of segment 511 is equipped with initial workpiece left cover 513 in the chopped-off head, it is described
Initial workpiece left cover 513 is connected by bolt with segment in chopped-off head, easy to disassemble, while also allows for the dismounting of first stage impeller.It is described
Flow passage structure is designed with initial workpiece left cover 513.The right side of the initial workpiece left cover 513 and segment 511 in the chopped-off head collectively forms
Flow passage structure, so easily facilitates the structure processing of parts, while initial workpiece left cover 513 is using the structure of diaphragm, can be with
Improve the flow regime that liquid enters first impeller.
In specific design, as shown in figure 1, the pump for passing on left core bag adjusting pad 54 and right side of the core pack assembly 5
Lid 3 holds out against contact, and the core bag adjusting pad 54 is the spiral wound gaskets of one group of controllable decrement.The core bag adjusting pad 54
The overall installation gap with outer cylinder body 1 of core pack assembly 5 can be ensured, and when conveying the medium of higher temperature, pass through pad
Compressibility, there is provided the space of thermal expansion.Greatly reduce stress of each part in expansion so that the service life of the pump is more
It is long.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump, it includes outer cylinder body (1), described outer
Cylinder (1) is horizontal positioned cylindrical shape, and horizontal installation cavity, the outer cylinder body (1) are machined with inside the outer cylinder body (1)
Left and right ends suction side stuffing box body (2), pump cover (3) are equipped with by sealing structure respectively, it is same among the outer cylinder body (1)
Axle is equipped with central shaft (4), and the both ends of the central shaft (4) are middle from the suction side stuffing box body (2), pump cover (3) respectively
It is protruding, the central shaft (4) and the suction side stuffing box body (2), the coaxial rotatable assembling of pump cover (3)；Its feature exists
In：The core pack assembly (5) being equipped with the central shaft (4) in installation cavity on the outer cylinder body (1), the outer cylinder body
(1) indoor design has a closing shoulder (11) fixed with outer cylinder body inwall of two ring-types, the outside of the core pack assembly (5) with
Closing shoulder (11) the sealing assembling, the core pack assembly (5) form three by closing shoulder (11) with the outer cylinder body (1) inwall
Individual annular housing, three annular housings are from left to right followed successively by suction chamber (12), discharge chamber (13), adapter cavity (14)；It is described outer
Two suction line (15), the discharge pipes being connected respectively with the suction chamber (12), discharge chamber (13) are designed with cylinder (1)
(16)；The core pack assembly (5) includes the first section (51) being from left to right sequentially connected, stage casing (52), latter end (53), the head
Section (51), stage casing (52), be respectively designed with inside latter end (53) around the inner chamber of the central shaft (4), the first section (51), in
Section (52), latter end (53) inner chamber in be respectively fitted with first impeller (41), middle impeller that annular is fixed on the central shaft (4)
(42), last years wheel (43)；In middle impeller (42) feed liquor position and the first section (51) inner chamber in stage casing (52) inner chamber
First impeller (41) drain position is connected, middle impeller (42) drain position in stage casing (52) inner chamber and the adapter cavity
(14) it is connected, the adapter cavity (14) is connected with last years wheel (43) feed liquor position in the latter end (53) inner chamber, described
Last years wheel (43) drain position in latter end (53) inner chamber is connected with the discharge chamber (13)；The middle impeller (42) with it is described
Last years wheel (43) assembles back-to-back, and the first impeller (41) is double-entry impeller, the first impeller (41) in first section (51) inner chamber
Both sides feed liquor position is connected with the suction chamber (12) respectively.
2. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 1, its feature exist
In：The outer cylinder body (1) is structure as a whole, and the core pack assembly (5) is formed by assembling parts, on the right side of the outer cylinder body (1)
Opening diameter is more than the maximum gauge of the core pack assembly (5).
3. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 1, its feature exist
In：The discharge pipe (16) is vertically to the top that the outer cylinder body (1) is assemblied in perpendicular to central shaft (4), the suction line
(15) it is horizontal to be assemblied in the rear portion for stating outer cylinder body (1) to perpendicular to central shaft (4).
4. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 1, its feature exist
In：The stage casing of the core pack assembly (5) is designed with the inner chamber that two or more surround central shaft (4), the stage casing (52)
End to end middle impeller (42) is respectively fitted with each inner chamber, the latter end of the core pack assembly (5) is designed with two or more ring
Around the inner chamber of central shaft (4), end to end last years wheel (43), institute are respectively fitted with each inner chamber of the latter end (53)
The inner chamber for stating stage casing (52) is identical with the inner chamber number of latter end (53).
5. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 4, its feature exist
In：The stage casing (52) and latter end (53) include two inner chambers.
6. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 1, its feature exist
In：The first impeller (41) is interference fitted with central shaft (4), the middle impeller (42), last years wheel (43) and central shaft (4) gap
Coordinate.
7. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 2, its feature exist
In：The stage casing (52) of the core pack assembly (5) includes middle baffle (521), and the middle baffle (521) is cylinder
Shape, connection stage casing (52) inner chamber and the feeding-passage of the adapter cavity (14) are designed with the middle baffle (521)
(522), it is also devised with connecting latter end (53) inner chamber and the tapping channel of the discharge chamber (13) on the middle baffle (521)
(523)；The feeding-passage (522), the number of tapping channel (523) are that two or more is relative, relatively described middle water conservancy diversion
The axis of body (521) is uniform.
8. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 2, its feature exist
In：The first section (51) of the core pack assembly (5) includes segment in chopped-off head (511), and the inner chamber of the first section (51) is designed in institute
State in segment in chopped-off head (511), segment (511) is designed with two relative axis centers pair on the right side of its inner chamber in the chopped-off head
The spiral chopped-off head feed liquor runner (512) claimed, external port and the suction chamber of two chopped-off head feed liquor runners (512)
(12) it is connected, the inner ports of described two chopped-off head feed liquor runners (512) enters liquid level with first impeller (41) both sides respectively
Put and be connected.
9. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 8, its feature exist
In：Initial workpiece left cover (513) is equipped with the chopped-off head on the left of segment (511), the initial workpiece left cover (513) passes through bolt and head
Segment is connected in level, and flow passage structure is designed with the initial workpiece left cover (513).
10. first-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump according to claim 8, its feature exist
In：The core bag adjusting pad (54) that passes on left of the core pack assembly (5) is held out against with the pump cover (3) on right side and contacted, and the core bag is adjusted
Whole pad (54) is the spiral wound gaskets of one group of controllable decrement.
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| CN201710950670.3A CN107559206A (en) | 2017-10-13 | 2017-10-13 | First-stage double-absorption structure Double-casing symmetrical expression radial direction subdivision centrifugal multistage pump multiple centrifugal pump |
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| CN109469624A (en) * | 2019-01-13 | 2019-03-15 | 嘉利特荏原泵业有限公司 | A kind of high revolving speed cartridge type centrifugal pump of high pressure |
| CN109469631A (en) * | 2018-10-24 | 2019-03-15 | 浙江朗庆智能科技有限公司 | A kind of centrifugal pump housing |
| CN113550909A (en) * | 2021-08-20 | 2021-10-26 | 镇江福泰克流体技术有限公司 | Pump body structure for ultra-high temperature high-speed alloy pump |
| CN114876809A (en) * | 2022-04-18 | 2022-08-09 | 宜兴市宙斯泵业有限公司 | Two-stage vertical side suction pump |
| US20230114352A1 (en) * | 2019-07-23 | 2023-04-13 | OOO Neftekamskij mashinostroitelnyj zavod | Multistage centrifugal pump with two parallel flows of pumped medium |
| CN116733751A (en) * | 2023-07-19 | 2023-09-12 | 江苏大学流体机械温岭研究院 | Multistage pump bi-pass structure and multistage centrifugal pump |
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| CN114876809A (en) * | 2022-04-18 | 2022-08-09 | 宜兴市宙斯泵业有限公司 | Two-stage vertical side suction pump |
| CN116733751A (en) * | 2023-07-19 | 2023-09-12 | 江苏大学流体机械温岭研究院 | Multistage pump bi-pass structure and multistage centrifugal pump |
| CN116733751B (en) * | 2023-07-19 | 2024-05-14 | 江苏大学流体机械温岭研究院 | Multistage pump bi-pass structure and multistage centrifugal pump |
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