CN1811199A - Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force - Google Patents
Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force Download PDFInfo
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- CN1811199A CN1811199A CN 200510041691 CN200510041691A CN1811199A CN 1811199 A CN1811199 A CN 1811199A CN 200510041691 CN200510041691 CN 200510041691 CN 200510041691 A CN200510041691 A CN 200510041691A CN 1811199 A CN1811199 A CN 1811199A
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Abstract
The present invention relates to method of regulating the axial force of multi-stage centrifugal pump, and is especially method of regulating multi-stage centrifugal pump with balance disc to balance axial force dynamically and in varying axial force. When some axial force increment from the wear of sealing intervals appears in running multi-stage pump, the flow rate of the throttle mechanism in the regulating device is regulated, so that the pressure inside the balance chamber is lowered, the balance force of the balance disc is increased and the increment in axial force is counteracted timely and properly to prolong the MTBF and the average life of the pump. The present invention has simple structure and reasonable design, and is suitable for various kinds of multi-stage centrifugal pump, volute one and guide vane one, horizontal one and vertical one.
Description
Technical field:
The present invention relates generally to the regulation and control multistage centrifugal pump method that axial force changes in running.Relate in particular to multistage centrifugal pump that the whole equidirectional installations of impeller carry out transient equiliblium to axial force with Balance disc in running when axial force changes to its method of regulating and control.
Background technique:
Multistage centrifugal pump is in running, and axial force is with working conditions change.Axial force all obtains balance under various operating modes in order to make, and multistage centrifugal pump has used Balance disc mechanism greatly.During with Balance disc balance axial force in multi-stage centrifugal pump, whole impellers of multistage pump are equidirectional to be installed on the pump shaft, all impeller inlet directions are pointed to the suction chamber 6-10 of pumps, and the axial force that impellers at different levels in service bear is all pointed to suction chamber 6-10 and changed with the operating mode of pump.The Balance disc 6-5 that packs into simultaneously behind impeller 6-1 on the pump rotor, the total axial force that makes the axial force (title equilibrant) of being born in the Balance disc running and pump is equal and opposite in direction and direction is opposite under any circumstance, reaches transient equiliblium.Two seal clearances are arranged in this Equilibrator, and one is that a radial clearance 6-2 is arranged between the wheel hub (axle sleeve) and the pump housing, and another is between Balance disc 6-5 end face and gimbal 6-3 (being fixed on the pump housing) end face axial clearance 6-4 to be arranged.The 6-6 of balance cylinder of Balance disc 6-5 back is connected with pump intake with connecting tube (being commonly called as balancing pipeline or return pipe) by the perforate on it.During the running of this multistage pump, rotor is a play back and forth vertically, and therefore all packing at drive end and anti-drive end allows the roller bearing of axial float.The axial force of bearing when a certain operating mode impellers at different levels reduces axial clearance 6-4 gap width when increasing, cause that radial clearance 6-2 internal leakage reduces to cause radial clearance 6-2 pressure at two ends difference to reduce, this can cause that axial clearance 6-4 internal pressure raises, thereby the equilibrant of Balance disc is strengthened thereupon, reach autobalance; On the contrary, the axial force of bearing when a certain operating mode impellers at different levels makes the gap width of axial clearance 6-4 increase when reducing, thereby the equilibrant of Balance disc is reduced thereupon, also reaches autobalance.In a word, during transient equiliblium, the gap width of different operating mode axial clearance 6-4 is different, and when axial force and equilibrant reached maximum value, the gap width of axial clearance 6-4 was got minimum value (or claiming lower limit) b
1When axial force and equilibrant reached minimum value, the gap width of axial clearance 6-4 was got maximum value (or deserving to be called limit value) b
2Generally speaking, the gap width of axial clearance is at b
1With b
2Between change.
But, pump is at run duration, because multistage centrifugal pump often uses under mine or in the open-air field irrigation, the running environment condition is relatively poor, often contain a certain amount of solid particle in the liquid that is pumped, the speed of wearing and tearing is sharply accelerated with the increasing of impurity content and granularity in the pump.Along with the wearing and tearing increasing of inter-stage seal clearance between seal ring seal gap before all impellers in the pump and all impellers, cause the axial force of pump under all operating modes, all to increase along the direction of pointing to water intake, require the equilibrant of Balance disc to increase, cause b
2, b
1Reduce gradually, so that lower limit b
1After going to zero, and then the end face of Balance disc 6-5 compressed to the end face of gimbal 6-3, cause grinding between the end face of the end face of Balance disc 6-5 and gimbal 63.Grinding between this rotor and the stator is unallowed, but must take place sooner or later, light then after the end face rapid wearing pump rotor push-tight rotor make rotor push away the bearing of bad motor, heavyly then cause two end faces to be burnt to death and the fault of whole rotor locking even off-axis take place.The phase of overhaul first (more than 8000 hours) that makes a large amount of pumps not reach industry standard regulation far away so just damages, the pump that has even can only use hundreds of hours.To the maintenance of disintegrating often of this method that solves in the sector, even renew pump in addition.Unplanned property shutdown phenomenon takes place repeatedly, has had a strong impact on ordinary production.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of dynamic regulation method with the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust is provided.When the present invention axial force increment occur owing to the wearing and tearing of various seal clearances when multistage pump in running, by adjust throttle mechanism in the regulating controller regulate leakage flow in the regulating controller make in the 6-6 of its balance cylinder pressure from the present invention given initial pressure, the reduction of property stage by stage, cause the equilibrant increase stage by stage of Balance disc accordingly, to carrying out in time appropriate opposite direction setoff because of the axial force increment appears in the seal clearance wearing and tearing in the pump operation process, thereby prolong the mean time between failures (MTBF) of multistage pump, improve the average life of pump.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of dynamic regulation is with the method for the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust, and its main feature is to include:
A. be provided with Balance disc (6-5) in the whole equidirectional installations of impeller with the rear portion that Balance disc carries out the multistage centrifugal pump impeller (6-1) of transient equiliblium to axial force, radial clearance (6-2) is arranged between the wheel hub and the pump housing, between Balance disc (6-5) end face and gimbal (6-3) end face axial clearance (6-4) is arranged; Be provided with regulation and control hole (6-8) on the pump housing in the scope of balance cylinder (6-6), will regulate and control hole (6-8) with regulating controller (3) and be connected, balance cylinder (6-6) is connected with suction chamber (6-10) with the return port (6-9) of suction casing suction chamber.
B. the anti-drive end at pump is provided with pump Balance disc axial position testing apparatus (7).Be provided with the axial displacement display list at pump on Balance disc axial position testing apparatus (7).Be used to show the gap width of axial clearance (6-4).
C. determine axial clearance (6-4) lower limit gap width b
1Be 0.05-0.20mm.b
1Concrete specifications and models with pump are slightly variant.
D. the actuator that uses throttle mechanism (3-1) conduct in the regulating controller (3) to regulate and control regulates the leakage flow in the regulating controller (3), makes the pump shown axial clearance lower limit gap width b of Balance disc axial position testing apparatus (7)
1When the axial force of the equilibrant of Balance disc and multistage centrifugal pump reaches transient equiliblium at 0.05≤b
1Between≤the 0.20mm.Described axial clearance (6-4) lower limit gap width b
1Be 0.08-0.15mm.
E. multistage pump brings into operation.
The described dynamic regulation method of the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust is characterized in that also including:
F. along with the wearing and tearing gradually of seal ring before the impellers at different levels in the pump in the multistage pump running and cross-over bush seal clearance, cause that whole pump axial force increases, thereby cause that the Balance disc equilibrant increases, and causes axial seal gap lower limit b
1Value begin to reduce gradually from normal value, work as b
1Value when normal value is reduced to minimum permitted value, repeat the D step; Multistage pump continues operation.
G. when running to the leakage flow of regulating with the throttle mechanism (3-1) in the regulating controller (3) in the regulating controller always, multistage centrifugal pump can't make the shown lower limit gap width b of Displaying Meter of pump usefulness Balance disc axial position testing apparatus (7)
1Increase to normal value or increase to a half of normal value from minimum permitted value, this multistage pump has reached the overhaul phase, and the maintenance of disintegrating of reply pump is being changed Sealing and other behind the wear-out part, repetition D step, and multistage centrifugal pump resumes operation.
Described dynamic regulation also includes the return port (6-9) of described suction casing suction chamber with the method for the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust and the diameter in regulation and control holes (6-8) is the 1/4-3/4 in multistage centrifugal pump pumping hole footpath.
Pump of the present invention includes at the pump shaft anti-drive end with Balance disc axial position testing apparatus (7) and is provided with mounting hole (7-8), studs with roller (7-9) in it, is provided with ball ball (7-10) between the end face of roller (7-9) and the tappet (7-11); Bearing support end cap (7-13) is connected and the pump housing, and tappet (7-11) is provided with crossette, is provided with holddown spring (7-12) on tappet (7-11), axial compression ball ball (7-10); Tappet (7-11) passes from bearing support end cap (7-13), bearing support end cap (7-13) is connected with gland (7-15), the endoporus of bearing support end cap (7-13) and gland (7-15) is combined into the pilot hole of tappet (7-11), is provided with feather key (7-16) between the endoporus of gland (7-15) and tappet (7-11); Drive block (7-17) cooperates with taper hole with tappet (7-11) is terminal, and is compressed by nut (7-18); On drive block (7-17), be provided with shaft position sensor.Shaft position sensor is for being provided with sensor holder (7-25) on the boss of bearing support end cap (7-13), sensor box (7-24) is adjusted screw (7-23) by sensing station and is fixed on sensor holder (7-25), linear movement pick-up (7-22) is located in the sensor box (7-24), be provided with sensor measuring staff arm (7-20) on drive block (7-17), it links to each other with survey end (7-21's) of linear movement pick-up (7-22).Which is provided with the axial displacement display list.Be used to show the gap width of axial clearance (6-4).This device is applied for a patent separately.
Regulating controller of the present invention (3) includes connecting tube (3-3,3-6), and its two ends are provided with and joining entrance point pipe joint of the pump housing (3-4) and outlet end pipe joint (3-5), are provided with throttle mechanism (3-1) on connecting tube (3-3,3-6); Throttle mechanism (3-1) is provided with the restrictor ring (3-9) in two different mesopores apertures at least for be provided with flange plate (3-7,3-8) on connecting tube (3-3,3-6) between two dishes.The caliber that connecting tube (3-3,3-6) is arranged is the 1/4-3/4 in multistage pump pumping hole footpath.This device is also applied for a patent separately.
Described regulating controller (3) also includes can be provided with mechanism for monitoring pressure gauge (3-2) differential pressure meter (3-2 ') on connecting tube (3-3,3-6).
Described dynamic regulation is with the axial force in multi-stage centrifugal pump method of Balance disc balancing axial thrust, and regulating controller (3) also comprises described throttle mechanism (3-1) for two ends are provided with screw thread, and is provided with the throttle pipe (3-1 ') in two different mesopores apertures at least.
Described regulating controller (3) comprises that also described throttle mechanism (3-1) is throttle valve or is the electric throttling valve.
The invention has the beneficial effects as follows,
1. simple in structure, reasonable in design.
2. the axial force increment that occurs in coming pump operation of the actuator that adjusts regulating controller by the user of pump in the pump operation process carries out timely and appropriate opposite direction and compensates for, and whether the reverse setoff work of directly or indirectly being monitored actuator by the mechanism for monitoring of regulating controller is appropriately reasonable.Saving of work and time, convenient and swift, can prevent unplanned property shutdown phenomenon, thereby multistage centrifugal pump Mean Time Between Failures and average life are greatly prolonged that the reliability index of pump is doubled and redoubled, and makes its regulation of industry standard head and shoulders above.Owing to flexible and suitable adjustment etc. that total progression i, impeller arrangement and other flow passage components of pump are made comparisons, the efficient of multistage centrifugal pump is increased simultaneously.
3. the mechanism for monitoring of the actuator of regulating controller and the regulating controller position very obviously and easily, outside that is installed in the pump housing is convenient to the axial force in multi-stage centrifugal pump increment is carried out timely and appropriate setoff.
4. be applicable to scroll casing type or stator formula, the multistage centrifugal pump of structural type such as horizontal or vertical.
Description of drawings:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
Fig. 1 is Application Example 1 plan view of the present invention.
Fig. 2 looks schematic representation for pump of the present invention with Balance disc axial position testing apparatus embodiment 1 master.
Fig. 3 looks schematic representation for pump of the present invention with Balance disc axial position testing apparatus embodiment 2 masters.
Fig. 4 is regulating controller embodiment's 1 an of the present invention plan view.
Fig. 5 is regulating controller embodiment's 2 an of the present invention plan view.
Embodiment:
Application examples: see Fig. 1, the single suction level Four segmental centrifugal pump of transient equiliblium is carried out in the whole equidirectional installations of impeller to axial force with Balance disc.
A. be provided with Balance disc 6-5 in the whole equidirectional installations of impeller with the rear portion that Balance disc carries out the multistage centrifugal pump impeller 6-1 of transient equiliblium to axial force, radial clearance 6-2 is arranged between the wheel hub and the pump housing, between Balance disc 6-5 end face and the gimbal 6-3 end face axial clearance 6-4 is arranged; Be provided with regulation and control hole 6-8 on the pump housing in the scope of the 6-6 of balance cylinder, will regulate and control hole 6-8 with regulating controller 3 and be connected, the 6-6 of balance cylinder is connected with suction chamber 6-10 with the return port 6-9 of suction casing suction chamber.The diameter in the return port 6-9 of suction casing suction chamber and regulation and control hole is 1/2 of multistage centrifugal pump pumping hole footpath.
B. the anti-drive end at pump is provided with pump with Balance disc axial position testing apparatus 7, which is provided with the axial displacement display list, in time shows the gap width of axial clearance 6-4.
C. determine axial clearance 6-4 lower limit gap width b
1Be 0.08-0.15mm.
D. regulate leakage flow in the regulating controller 3 with the throttle mechanism 3-1 in the regulating controller 3 as the actuator of regulation and control, make pump with the shown axial clearance lower limit gap width b of Balance disc axial position testing apparatus 7
1When the axial force of the equilibrant of Balance disc and multistage centrifugal pump reaches transient equiliblium at 0.08≤b
1Between≤the 0.15mm.
E. finish above-mentioned steps before dispatching from the factory.
F. multistage pump brings into operation.
G. when running to the leakage flow of regulating with the throttle mechanism 3-1 in the regulating controller 3 in the regulating controller always, multistage centrifugal pump can't make the shown lower limit gap width b of Displaying Meter of pump usefulness Balance disc axial position testing apparatus 7
1Increase to normal value or increase to a half of normal value from minimum permitted value, this multistage pump has reached the overhaul phase, and the maintenance of disintegrating of reply pump is being changed Sealing and other behind the wear-out part, repetition D step, and multistage centrifugal pump resumes operation.
Regulate leakage flow in the regulating controller and can't make pump increase from the minimum clearance value to reach normal value b or increase when reaching normal value b/2 when multistage centrifugal pump runs to throttle mechanism 3-1 in the regulating controller 3 always with the show value of the Displaying Meter of Balance disc axial position testing apparatus 7, this multistage pump has reached the overhaul phase, the maintenance of disintegrating of reply pump, changing Sealing and other behind the wear-out part, repeat the D step, multistage centrifugal pump resumes operation.
Pump is seen Fig. 2 with Balance disc axial position testing apparatus embodiment 1, and pump is provided with mounting hole 7-8 with Balance disc axial position testing apparatus 7 at the pump shaft anti-drive end, studs with roller 7-9 in it, is provided with ball ball 7-10 between the end face of roller 7-9 and the tappet 7-11; Bearing support end cap 7-13 is connected and the pump housing, and tappet 7-11 is provided with crossette, is provided with holddown spring 7-12 on tappet 7-11, axial compression ball ball 7-10; Tappet 7-11 passes from bearing support end cap 7-13, and bearing support end cap 7-13 and gland 7-15 are connected, and the endoporus of bearing support end cap 7-13 and gland 7-15 is combined into the pilot hole of tappet 7-11, is provided with feather key 7-16 between the endoporus of gland 7-15 and tappet 7-11; Drive block 7-17 cooperates with taper hole with tappet 7-11 end, and is compressed by nut 7-18; On drive block 7-17, be provided with shaft position sensor.Be provided with the axial displacement display list at pump on Balance disc axial position testing apparatus 7.Shaft position sensor is for being provided with sensor holder 7-25 on the boss of bearing support end cap 7-13, sensor box 7-24 adjusts screw 7-23 by sensing station and is fixed on sensor holder 7-25, linear movement pick-up 7-22 is located in the sensor box 7-24, be provided with sensor measuring staff arm 7-20 on drive block 7-17, it links to each other with the survey end 7-21's of linear movement pick-up 7-22.
Pump Balance disc axial position testing apparatus embodiment 2, see Fig. 3, pump Balance disc axial position testing apparatus 7, shaft position sensor can also have described shaft position sensor for radially being provided with groove at drive block 7-17, in the lever arm 8-2 drive end a insertion groove, facet mirror 8-1 is located at the lever arm 8-2 the other end and perpendicular, can freely rotate around the axes O that is positioned at the mirror plane, the axle head of O is top, dead head and water proof and dust proof cover 7-19 or be connected with bearing support end cap 7-13, lever arm 8-2 is provided with a small-sized collimator or small flashlight 8-3 along lever arm ao direction 2-5 rice A point at a distance, and in the direction perpendicular to oa Steel Ruler 8-4 is set.All the other structures are identical with last example.
Regulating controller embodiment 1: see Fig. 4, connecting tube 3-3,3-6 are arranged, its two ends are provided with and the pump housing joining entrance point pipe joint 3-4 and outlet end pipe joint 3-5, are provided with throttle mechanism 3-1 on connecting tube 3-3,3-6.On connecting tube 3-3,3-6, also be provided with mechanism for monitoring pressure gauge 3-2.The caliber of connecting tube 3-3,3-6 is 1/2 of multistage pump pumping hole footpath.Throttle mechanism 3-1 is provided with the restrictor ring 3-9 in six different mesopores apertures for be provided with flange plate 3-7,3-8 on connecting tube 3-3,3-6 between two dishes.
Regulating controller embodiment 2: see Fig. 5, throttle mechanism 3-1 is throttle valve or is the electric throttling valve.All the other structures are identical with last example.
Claims (10)
1. a dynamic regulation is characterized in that including with the method for the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust:
A. be provided with Balance disc (6-5) in the whole equidirectional installations of impeller afterwards with the multistage centrifugal pump impeller (6-1) that Balance disc carries out transient equiliblium to axial force, radial clearance (6-2) is arranged between the wheel hub and the pump housing, between Balance disc (6-5) end face and gimbal (6-3) end face axial clearance (6-4) is arranged; Be provided with regulation and control hole (6-8) on the pump housing in the scope of balance cylinder (6-6), will regulate and control hole (6-8) with regulating controller (3) and be connected, balance cylinder (6-6) is connected with suction chamber (6-10) with the return port (6-9) of suction casing suction chamber.
B. the anti-drive end at pump is provided with pump Balance disc axial position testing apparatus (7).
C. determine axial clearance (6-4) lower limit gap width b
1Be 0.05-0.20mm.
D. the actuator that uses throttle mechanism (3-1) conduct in the regulating controller (3) to regulate and control regulates the leakage flow in the regulating controller (3), makes the pump shown axial clearance lower limit gap width b of Balance disc axial position testing apparatus (7)
1When the axial force of the equilibrant of Balance disc and multistage centrifugal pump reaches transient equiliblium at 0.05≤b
1Between≤the 0.20mm.
E. multistage pump brings into operation.
2. the dynamic regulation as claimed in claim 1 method of the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust is characterized in that also including:
F. along with the wearing and tearing gradually of seal ring before the impellers at different levels in the pump in the multistage pump running and cross-over bush seal clearance, cause that whole pump axial force increases, thereby cause that the Balance disc equilibrant increases, and causes axial seal gap lower limit b
1Value begin to reduce gradually from normal value, work as b
1Value when normal value is reduced to minimum permitted value, repeat the D step; Multistage pump continues operation.
G. when running to the leakage flow of regulating with the throttle mechanism (3-1) in the regulating controller (3) in the regulating controller always, multistage centrifugal pump can't make the shown lower limit gap width b of Displaying Meter of pump usefulness Balance disc axial position testing apparatus (7)
1Increase to normal value or increase to a half of normal value from minimum permitted value, this multistage pump has reached the overhaul phase, and the maintenance of disintegrating of reply pump is being changed Sealing and other behind the wear-out part, repetition D step, and multistage centrifugal pump resumes operation.
3. dynamic regulation as claimed in claim 1 is characterized in that also including that with the method for the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust the return port (6-9) of described suction casing suction chamber and the diameter in regulation and control holes (6-8) are the 1/4-3/4 in multistage centrifugal pump pumping hole footpath.
4. dynamic regulation as claimed in claim 1 is characterized in that described axial clearance (6-4) lower limit gap width b with the method for the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust
1Be 0.08-0.15mm.
5. the dynamic regulation as claimed in claim 1 method of the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust, the described pump of its feature includes at the pump shaft anti-drive end with Balance disc axial position testing apparatus (7) and is provided with mounting hole (7-8), stud with roller (7-9) in it, be provided with ball ball (7-10) between the end face of roller (7-9) and the tappet (7-11); Bearing support end cap (7-13) is connected and the pump housing, and tappet (7-11) is provided with crossette, is provided with holddown spring (7-12) on tappet (7-11), axial compression ball ball (7-10); Tappet (7-11) passes from bearing support end cap (7-13), bearing support end cap (7-13) is connected with gland (7-15), the endoporus of bearing support end cap (7-13) and gland (7-15) is combined into the pilot hole of tappet (7-11), is provided with feather key (7-16) between the endoporus of gland (7-15) and tappet (7-11); Drive block (7-17) cooperates with taper hole with tappet (7-11) is terminal, and is compressed by nut (7-18); On drive block (7-17), be provided with shaft position sensor.
6. the dynamic regulation as claimed in claim 4 method of the axial force in multi-stage centrifugal pump of Balance disc balancing axial thrust, the described pump of its feature is to be provided with sensor holder (7-25) on the boss of bearing support end cap (7-13) with the shaft position sensor of Balance disc axial position testing apparatus (7), sensor box (7-24) is adjusted screw (7-23) by sensing station and is fixed on sensor holder (7-25), linear movement pick-up (7-22) is located in the sensor box (7-24), be provided with sensor measuring staff arm (7-20) on drive block (7-17), it links to each other with survey end (7-21's) of linear movement pick-up (7-22).
7. the dynamic regulation as claimed in claim 1 axial force in multi-stage centrifugal pump method of Balance disc balancing axial thrust, it is characterized in that described regulating controller (3), include connecting tube (3-3,3-6), its two ends are provided with and joining entrance point pipe joint of the pump housing (3-4) and outlet end pipe joint (3-5), are provided with throttle mechanism (3-1) on connecting tube (3-3,3-6); Throttle mechanism (3-1) is provided with the restrictor ring (3-9) in two different mesopores apertures at least for be provided with flange plate (3-7,3-8) on connecting tube (3-3,3-6) between two dishes.
8. dynamic regulation as claimed in claim 7 is with the axial force in multi-stage centrifugal pump method of Balance disc balancing axial thrust, it is characterized in that described regulating controller (3) also includes to be provided with mechanism for monitoring pressure gauge (3-2) differential pressure meter (3-2 ') on connecting tube (3-3,3-6).
9. as claim 7 or the 8 described dynamic regulations axial force in multi-stage centrifugal pump method with the Balance disc balancing axial thrusts, the caliber of (3-3,3-6) is the 1/4-3/4 in multistage pump pumping hole footpath to it is characterized in that also including connecting tube by described regulating controller (3).
10. dynamic regulation as claimed in claim is characterized in that with the axial force in multi-stage centrifugal pump method of Balance disc balancing axial thrust described regulating controller (3) comprises that also described throttle mechanism (3-1) is throttle valve or is the electric throttling valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100416910A CN100455823C (en) | 2005-01-30 | 2005-01-30 | Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100416910A CN100455823C (en) | 2005-01-30 | 2005-01-30 | Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1811199A true CN1811199A (en) | 2006-08-02 |
| CN100455823C CN100455823C (en) | 2009-01-28 |
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ID=36844277
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100416910A Expired - Fee Related CN100455823C (en) | 2005-01-30 | 2005-01-30 | Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force |
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| Country | Link |
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| CN (1) | CN100455823C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806311A (en) * | 2009-02-18 | 2010-08-18 | 株式会社久保田 | Pump and using method thereof |
| CN104806529A (en) * | 2014-01-24 | 2015-07-29 | 昆明冶金高等专科学校 | Axial-force self-balancing multi-stage centrifugal pump |
| CN111810410A (en) * | 2020-07-07 | 2020-10-23 | 长沙中联泵业股份有限公司 | Multistage centrifugal pump with novel axial force balancing device and design method of balancing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847171A (en) * | 1981-09-14 | 1983-03-18 | Toshiba Corp | Multi-stage hydraulic machinery |
| CN2129820Y (en) * | 1992-07-08 | 1993-04-14 | 石油管理局川中矿区 | lens restrictor |
| CN2127749Y (en) * | 1992-07-20 | 1993-03-03 | 山东省日照水泵厂 | Vertical suspension centrifugal pump |
-
2005
- 2005-01-30 CN CNB2005100416910A patent/CN100455823C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806311A (en) * | 2009-02-18 | 2010-08-18 | 株式会社久保田 | Pump and using method thereof |
| CN101806311B (en) * | 2009-02-18 | 2014-11-05 | 株式会社久保田 | Pump and using method thereof |
| CN104806529A (en) * | 2014-01-24 | 2015-07-29 | 昆明冶金高等专科学校 | Axial-force self-balancing multi-stage centrifugal pump |
| CN111810410A (en) * | 2020-07-07 | 2020-10-23 | 长沙中联泵业股份有限公司 | Multistage centrifugal pump with novel axial force balancing device and design method of balancing device |
| CN111810410B (en) * | 2020-07-07 | 2024-05-14 | 长沙中联泵业股份有限公司 | Multistage centrifugal pump with axial force balancing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100455823C (en) | 2009-01-28 |
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