CN2766069Y - Apparatus for dynamically regulating and controlling axial force of multiple-stage centrifugal pump - Google Patents
Apparatus for dynamically regulating and controlling axial force of multiple-stage centrifugal pump Download PDFInfo
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- CN2766069Y CN2766069Y CN 200520078351 CN200520078351U CN2766069Y CN 2766069 Y CN2766069 Y CN 2766069Y CN 200520078351 CN200520078351 CN 200520078351 CN 200520078351 U CN200520078351 U CN 200520078351U CN 2766069 Y CN2766069 Y CN 2766069Y
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- axial force
- pump
- centrifugal pump
- stage centrifugal
- connecting tube
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Abstract
The utility model mainly relates to a device for regulating and controlling the axial force of a multistage centrifugal pump during running. A device for regulating and controlling the axial force of a multistage centrifugal pump during running in a dynamic mode comprises communicating pipes (3-3 and 3-6), wherein both ends of the communicating pipes are provided with a pipe joint (3-4) on an inlet end and a pipe joint (3-5) on an outlet end which are connected with a pump body. The utility model is characterized in that the utility model also comprises a throttle mechanism (3-1) arranged on the communicating pipes (3-3 and 3-6). After the utility model is communicated with a high pressure cavity and a low pressure cavity of a multistage pump, the size and the direction of axial force can be regulated and controlled through regulating the size of the inner diameter of the throttle mechanism. The utility model has the advantages of simple structure and reasonable design. The utility model is suitable for multistage centrifugal pumps in structure forms such as a spiral casing form or a guide blade form or a horizontal form or a vertical form, etc.
Description
Technical field:
The utility model relates generally to the device of the regulation and control multistage centrifugal pump regulation and control that axial force changes in running.
Background technique:
Axial force is one of principal element that influences the centrifugal pump mean lifetime.In the prior art, for single stage single suction volute pump, the method of balancing axial thrust is to establish seal ring (title increasing back sealing ring) and sealing ring scope is connected with suction port with interior pump chamber on back shroud of impeller, make the pressure basic neutralisation that is born on the forward and backward cover plate of impeller, residual axial force is born by thrust-bearing.Connection method has two kinds: a kind of is to open equalizing orifice in the increasing back sealing ring scope on interior back shroud of impeller, and another kind is with off-load pipe (return pipe) pump chamber in this scope to be connected with suction port.Generally about 10mm, off-load pipe diameter no longer changes its off-load pipe diameter after dispatching from the factory.Multistage centrifugal pump impeller number is at least more than two, tens even more at most.The method of balancing axial thrust has, and A. scroll casing type multistage centrifugal pump has the spirality pumping chamber, and housing is normally opened in the level, adopts impeller symmetric arrangement method to come balancing axial thrust, and residual axial force is born by thrust-bearing; B. to be called the utility model patent of " the multistage slag stock pump of the opposed scroll casing type of sections " disclosed be the multistage slag stock pump of sections scroll casing type to the ZL96217016.X of Shanxi Yangquan City Water Pump Factory name; C. the whole impellers of traditional segmental centrifugal pump are equidirectional to be installed on the pump shaft, and pumping chambers at different levels are stator formula radially, and it is one that stator is strained vertically with turnbuckle.This pump adopts Balance disc or the balancing drum (claiming the off-load dish again) behind the impeller to come balancing axial thrust for a long time always; D. inventor's patent of invention of being called " multistage sectional centrifugal pump of impeller symmetric arrangement " in the ZL02114680.2 name discloses a kind of single suction multistage segmental centrifugal pump, and impeller distributes and is the near symmetrical state, and residual axial force is born by thrust-bearing.The multistage centrifugal pump of above-mentioned various structural types no matter be scroll casing type or stator formula radially, general two classes of dividing of the method for its balancing axial thrust: a class is that the method with symmetric arrangement makes whole pump axial force in a basic balance, bears residual axial force by thrust-bearing; Another kind of is the equidirectional installations of whole impellers, makes the axial force of whole pump reach transient equiliblium with Balance disc, perhaps use the equilibrant of balancing drum (off-load dish) and the axial force of whole pump to reach in a basic balance, and residual axial force is still born by thrust-bearing.The axial force of said pump adjusted before dispatching from the factory is good, no longer regulates and control the work of axial force in running.
But, pump is at run duration, because the multistage centrifugal pump most cases 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, and the phase of overhaul first (more than 8000 hours) that causes a large amount of pumps not reach the industry standard regulation far away just damages, the pump that has even can only use hundreds of hours.To this] maintenance of disintegrating often of the method that solves in the sector, even make and renew pump.Unplanned property shutdown phenomenon takes place repeatedly, has had a strong impact on ordinary production.
The inventor is according to for many years observation and research, discovery is along with the prolongation of pump operation time, seal clearance all can strengthen gradually because of wearing and tearing before and after the single suction impeller, the increasing of preceding seal clearance makes pressure distribution that front shroud of impeller bears lower, the increasing of back seal clearance makes pressure distribution that back shroud of impeller bears raise, and the two causes that all axial force increases so that cause the damage of thrust-bearing along the direction of specifying single suction impeller water inlet oral-lateral.Tradition single suction single stage centrifugal pump increases axial force in the said pump running does not have concrete counter-measure, is that this axial mental and physical efforts increments of change is less, and pace of change is slower, and the harm that shows is very serious not.And in the actual moving process of multistage pump, all seal clearances all can increase gradually because of wearing and tearing, the wearing and tearing of each seal clearance all can cause the outer pressure distribution of two cover plates of every grade of impeller to change, the axial mental and physical efforts that every grade of impeller bears are along with increment appears in operation, and this axial mental and physical efforts incremental raio single-stage pump situation of most impellers is also much bigger in the multistage centrifugal pump.The increment superposition of the axial mental and physical efforts that the whole impeller of multimachine pump is born shows as the axial mental and physical efforts increment that occurs in whole the multistage pump running together.This increment has been compared three outstanding features with the single-stage pump situation: the one, value is big, the 2nd, change fast, the 3rd, direction and size can be with symmetric arrangement whether with the concrete mode of symmetric arrangement and different.This tends to cause the actual axial force value of whole multistage pump to exceed the axial force excursion of design code, and cause the damage of multistage centrifugal pump, also be multistage centrifugal pump rate of fault the most basic, the most important reason much higher in the engineering practice far beyond the single stage centrifugal pump rate of fault.The fact is in the prior art, and multistage centrifugal pump is more much higher than the rate of fault that single stage centrifugal pump causes because of axial force is excessive.In a word, the axial mental and physical efforts increment that occurs in the running is multistage centrifugal pump causes various faults because of axial force is an excessive root.
The model utility content:
The purpose of this utility model is to avoid the deficiencies in the prior art part and regulating controller that a kind of dynamic regulation axial force in multi-stage centrifugal pump is provided.When multistage pump the axial force increment occurs owing to the wearing and tearing of various seal clearances in running, make the pressure difference at its inlet/outlet two ends reach predetermined value by the throttle mechanism adjusting flow of adjusting in the regulating controller, thereby the difference of the pressure distribution mean value in the control multistage pump in two specific cavitys reaches predetermined value, 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.
The purpose of this utility model can be by realizing by the following technical solutions: a kind of regulating controller of dynamic regulation axial force in multi-stage centrifugal pump, 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), and its main feature is also to be included in connecting tube (3-3,3-6) to be provided with throttle mechanism (3-1).With its with the hyperbaric chamber of multistage pump with after low-pressure cavity is communicated with, by adjusting the size of throttle mechanism (3-1) hole internal diameter, can regulate and control the size and the direction of axial force.
The regulating controller of described dynamic regulation axial force in multi-stage centrifugal pump also included and be provided with mechanism for monitoring pressure gauge (3-2) differential pressure meter (3-2 ') on connecting tube (3-3,3-6).According to inventor's years of researches and test, when with the hyperbaric chamber of regulating controller and multistage pump with after low-pressure cavity is communicated with, there is the corresponding relation of function in the pressure of the hyperbaric chamber of mechanism for monitoring pressure gauge (3-2) differential pressure meter (3-2 ') reflection with axial force in multi-stage centrifugal pump, by pressure gauge differential pressure meter can the indirect monitoring axial force size and direction.
The regulating controller of dynamic regulation axial force in multi-stage centrifugal pump described in the utility model also includes connecting tube, and the caliber of (3-3,3-6) is the 1/4-3/4 in multistage pump pumping hole footpath.
Throttle mechanism (3-1) also can be and be provided with flange plate (3-7,3-8) on connecting tube (3-3,3-6), was provided with the restrictor ring (3-9) in two different apertures between two dishes at least.
Throttle mechanism (3-1) is also at connecting tube (3-6) outlet end pipe joint (3-5) or be provided with the restrictor ring (3-9) in two different apertures at least on connecting tube (3-3) entrance point pipe joint (3-4).
Throttle mechanism (3-1) can also be provided with screw thread for two ends, and is provided with the throttle pipe (3-10) in two different apertures at least.
Throttle mechanism (3-1) also can be throttle valve or is the electric throttling valve.Throttle valve or electric throttling valve are that aperture can be regulated continuously and arbitrary aperture all can reliably keep.
Mechanism for monitoring pressure gauge described in the utility model (3-2) can be located at the high pressure pump chamber Q with the joining pump housing of entrance point pipe joint (3-4)
gOn.
Described mechanism for monitoring differential pressure gauge (3-2 ') can be located between the low pressure pump chamber Qd of the connecting tube (3-3,3-6) and the joining pump housing of outlet end pipe joint (3-5).
Mechanism for monitoring differential pressure gauge (3-2 ') also can be located at the high pressure pump chamber Q of connecting tube (3-3,3-6) and the joining pump housing of entrance point pipe joint (3-4)
gBetween.
The beneficial effects of the utility model are,
1. simple in structure, reasonable in design.
2. axial force in multi-stage centrifugal pump is adjusted in the variation of the test component numerical value that is provided with on according to regulating controller by the user in the process of pump operation, the axial force of multistage pump is in the scope of design code all the time, thereby the mean time between failures (MTBF) of multistage centrifugal pump and average life are greatly prolonged.Simultaneously, owing to can the efficient of multistage centrifugal pump be increased to the flexible and suitable adjustment etc. of making comparisons of the arrangement of multistage centrifugal pump impeller sum i and impeller and other flow passage components.
3. regulating controller is installed in very obvious and position easily, the outside of the pump housing, is convenient to its throttling action is carried out in good time adjustment.
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 the utility model embodiment 1 a plan view.
Fig. 2 is the utility model embodiment 2 a plan view.
Fig. 3 is the utility model embodiment 3 a plan view.
Fig. 4 is the utility model embodiment 4 a plan view.
Fig. 5 is the utility model embodiment 5 a plan view.
Embodiment:
Embodiment 1: see Fig. 1, the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump has connecting tube 3-3,3-6, and 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 or be provided with differential 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.
Embodiment 2: the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump, throttle mechanism 3-1 is for being provided with the restrictor ring 3-9 in two different mesopores apertures at least on connecting tube 3-6 outlet end pipe joint 3-5.Its mechanism for monitoring differential pressure gauge 3-2 ' be located at connecting tube 3-3,3-6 and and the low pressure pump chamber Qd of the pump housing of the joining multistage pump of outlet end pipe joint 3-5 between.Other structure is identical with embodiment 1.
Embodiment 3: the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump, throttle mechanism 3-1 are that two ends are provided with screw thread, and are provided with the throttle pipe 3-10 in two different mesopores apertures at least.Other structure is identical with embodiment 1.
Embodiment 4: the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump, throttle mechanism 3-1 are throttle valve or are the electric throttling valve.
Embodiment 5: the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump, throttle mechanism 3-1 is for being provided with the restrictor ring 3-9 in two different mesopores apertures at least on connecting tube 3-3,3-6 entrance point pipe joint 3-4.Mechanism for monitoring pressure gauge 3-2 is located at the high pressure pump chamber Q with the joining pump housing of entrance point pipe joint 3-4
gOn.Its mechanism for monitoring differential pressure gauge 3-2 ' is located at the high pressure pump chamber Q of the pump housing of connecting tube 3-3,3-6 and the joining pump housing of entrance point pipe joint 3-4
gBetween.
Claims (10)
1. the regulating controller of a dynamic regulation axial force in multi-stage centrifugal pump, 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), it is characterized in that also being included in connecting tube (3-3,3-6) and are provided with throttle mechanism (3-1).
2. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 1 is characterized in that also including be provided with mechanism for monitoring pressure gauge (3-2) differential pressure meter (3-2 ') on connecting tube (3-3,3-6).
3. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 1 or 2, 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.
4. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 3, it is characterized in that also comprising that described throttle mechanism (3-1) for be provided with flange plate (3-7,3-8) on connecting tube (3-3,3-6), is provided with the restrictor ring (3-9) in two different apertures at least between two dishes.
5. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 3 is characterized in that also comprising that described throttle mechanism (3-1) is at connecting tube (3-6) outlet end pipe joint (3-5) or be provided with the restrictor ring (3-9) in two different apertures at least on connecting tube (3-3) entrance point pipe joint (3-4).
6. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 3 is characterized in that also comprising described throttle mechanism (3-1) for two ends are provided with screw thread, and is provided with the throttle pipe (3-10) in two different apertures at least.
7. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 3 is characterized in that also comprising that described throttle mechanism (3-1) can be throttle valve or is the electric throttling valve.
8. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 2 is characterized in that also comprising that described mechanism for monitoring pressure gauge (3-2) can be located on the high pressure pump chamber Qg with the joining pump housing of entrance point pipe joint (3-4).
9. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 2 is characterized in that also comprising that described mechanism for monitoring differential pressure gauge (3-2 ') can be located between the low pressure pump chamber Qd of the connecting tube (3-3,3-6) and the joining pump housing of outlet end pipe joint (3-5).
10. the regulating controller of dynamic regulation axial force in multi-stage centrifugal pump as claimed in claim 2 is characterized in that also comprising that described mechanism for monitoring differential pressure gauge (3-2 ') can be located at the high pressure pump chamber Q of connecting tube (3-3,3-6) and the joining pump housing of entrance point pipe joint (3-4)
gBetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078351 CN2766069Y (en) | 2005-01-30 | 2005-01-30 | Apparatus for dynamically regulating and controlling axial force of multiple-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078351 CN2766069Y (en) | 2005-01-30 | 2005-01-30 | Apparatus for dynamically regulating and controlling axial force of multiple-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2766069Y true CN2766069Y (en) | 2006-03-22 |
Family
ID=36606733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520078351 Expired - Fee Related CN2766069Y (en) | 2005-01-30 | 2005-01-30 | Apparatus for dynamically regulating and controlling axial force of multiple-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2766069Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455816C (en) * | 2005-01-30 | 2009-01-28 | 陆雄 | Regulator for dynamic regulation of axial force in multi-stage centrifugal pump |
| CN110486514A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | A kind of volume control device |
-
2005
- 2005-01-30 CN CN 200520078351 patent/CN2766069Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455816C (en) * | 2005-01-30 | 2009-01-28 | 陆雄 | Regulator for dynamic regulation of axial force in multi-stage centrifugal pump |
| CN110486514A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | A kind of volume control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060322 Termination date: 20120130 |