CN206816543U - A kind of combined multi-stage centrifugal pump axial thrust balancing devices - Google Patents
A kind of combined multi-stage centrifugal pump axial thrust balancing devices Download PDFInfo
- Publication number
- CN206816543U CN206816543U CN201720706482.1U CN201720706482U CN206816543U CN 206816543 U CN206816543 U CN 206816543U CN 201720706482 U CN201720706482 U CN 201720706482U CN 206816543 U CN206816543 U CN 206816543U
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- China
- Prior art keywords
- balancing
- balancing drum
- main shaft
- balance set
- centrifugal pump
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of combined multi-stage centrifugal pump axial thrust balancing devices, including balance set 5, balancing drum 6, positioning screw 4, axle sleeve 3 and mechanical position limitation mechanism 7, its bottom bracket axle 3 is installed on impeller 2 behind, balancing drum 6 is mounted on main shaft 1, and the side end face of balancing drum 6 one and the end contact of axle sleeve 3, it is connected between the inner circle of balance set 5 is cylindrical with balancing drum 6 by nested mode, balance set 5 is fixedly installed in pump water exit end by positioning screw 4, correct position sets step after the main shaft 1 of installation balancing drum 6 and mechanical position limitation mechanism 7 is fixed at the step of main shaft 1.The device substitutes thrust bearing, and balanced residue axial force using axial limiting mechanism, with the normal service life of extending shaft end bearing.
Description
Technical field
Fluid conveying machine field, more particularly to axial force in multi-stage centrifugal pump balancing technique field are the utility model is related to,
More particularly to a kind of combined multi-stage centrifugal pump axial thrust balancing devices.
Background technology
The mode of centrifugal multistage pump multiple centrifugal pump balancing axial thrust is mainly balanced by thrust bearing balancing axial thrust, balancing disc structure at present
Axial force and balancing drum balance of mechanism axial force three types, wherein thrust bearing balancing axial thrust be mainly used in pony pump,
The few pump of series, if the pump more applied to big pump or series easily causes overload and burned out a bearing；And balancing disc structure balances
Axial force requires that the gap between balancing frame and balance ring end face is strict controlled in 0.1~0.5mm or so, if balancing frame and balance
Czermak space is small easily to cause balance disk wear to cause cisco unity malfunction, if gap it is excessive produced during pump startup it is larger
Dynamical reaction makes rotor play and clamping motor axle forward, causes the damage of motor.
Balancing drum is installed on the impeller of multistage subsection formula pump behind, is connected balance cylinder and inlet tube by balance pipe
It is logical, on the one hand play a part of balancing axial thrust, on the other hand can reduce sealing cavity pressure, both ends is sealed cavity pressure base
This is identical, but balancing drum device can only balancing axial thrust, and the position of rotor can not be limited, and in operating condition-jumping, turn
The very likely irregular axial float of son, produces residual axial force, influences the normal operation of pump rotor.At present centrifugal multistage pump multiple centrifugal pump or
For self-balanced multiple-stage centrifugal pump when balancing axial thrust by the way of balancing drum, residual axial force is typically by thrust bearing or thrust shaft
Bear.And by the maximum axial thrust that thrust bearing or thrust bearing can carry is limited, it is when centrifugal multistage pump multiple centrifugal pump or certainly flat
Centrifugal multistage pump multiple centrifugal pump weigh in operating condition-jumping, residual axial force has pulsating nature, when residual axial force is more than thrust bearing or thrust
During the maximum axial force that bearing can carry, thrust bearing or thrust bearing will be made to overheat and operational failure.
The content of the invention
A kind of the defects of the purpose of this utility model is to exist for current axial force balance mechanism, there is provided combined type
Axial force balance device of multistage centrifugal pump, mainly pass through balancing drum mechanism and mechanical position limitation Mechanism Combination formula axial force balance mode
Realize the axial force balance of centrifugal multistage pump multiple centrifugal pump.
To achieve the above object, the utility model is achieved through the following technical solutions：
A kind of described combined multi-stage centrifugal pump axial thrust balancing devices, including balance set, balancing drum, positioning screw,
Axle sleeve and mechanical position limitation mechanism, its bottom bracket axle are installed on impeller behind, and balancing drum is mounted on main shaft, and balancing drum
One side end face contacts with end face of shaft bush, is connected between balance set inner circle and balance drum of outer by nested mode, balance set leads to
Cross positioning screw and be fixedly installed in pump water exit end, correct position on the main shaft of balancing drum is installed step and mechanical position limitation mechanism are set
It is fixed at the step of main shaft.
The beneficial effects of the utility model are as follows：The axial force of centrifugal multistage pump multiple centrifugal pump is mainly due to impeller front and rear cover plate appearance
Surface pressure is distributed asymmetric and compression area difference caused by caused pressure differential, and balancing drum has balancing axial thrust
Function, generally 80%~85% axial force can be balanced by balancing drum, and residual axial force is undertaken by thrust bearing,
And the axial force that thrust bearing can bear is certain, simultaneously because, when operating mode occurs for pump. in centrifugal multistage pump multiple centrifugal pump in the process of running
During transition, pressure fluctuation phenomenon is will appear from centrifugal pump fluid field, pulsation phenomenon occurs in axial force therewith, if residual axial force is big
When the maximum axial thrust that thrust bearing can carry, the heavy damage of thrust bearing will be caused, influence its performance.This
Thrust bearing, and balanced residue axial force are substituted using axial limiting mechanism in utility model, with extending shaft end bearing just
Normal service life.
Brief description of the drawings
Fig. 1 is a kind of overall structure diagram of combined multi-stage centrifugal pump axial thrust balancing devices of the utility model；
In figure mark for：1：Main shaft；2：Impeller；3：Axle sleeve；4：Positioning screw；5：Balance set；6：Balancing drum；7：Machine
Tool position-limit mechanism.
Specific implementation step
Below in conjunction with accompanying drawing 1, one embodiment of the present utility model is further described：
A kind of described combined multi-stage centrifugal pump axial thrust balancing devices includes balance set 5, balancing drum 6, positioning screw
4th, axle sleeve 3 and mechanical position limitation mechanism 7, its bottom bracket axle 3 are installed on impeller 2 behind, and balancing drum 6 is mounted on main shaft 1,
And the side end face of balancing drum 6 one and the end contact of axle sleeve 3, it is connected between the inner circle of balance set 5 is cylindrical with balancing drum 6 by nested mode
Connect, balance set 5 is fixedly installed in pump water exit end by positioning screw 4, installs correct position setting table on the main shaft 1 of balancing drum 6
Rank and mechanical position limitation mechanism 7 is fixed at the step of main shaft 1.
Claims (1)
1. a kind of combined multi-stage centrifugal pump axial thrust balancing devices, including：Main shaft（1）, impeller（2）, axle sleeve（3）, it is fixed
Position screw（4）, balance set（5）, balancing drum（6）With mechanical position limitation mechanism（7）, it is characterised in that：Axle sleeve（3）It is installed on final stage leaf
Wheel（2）Behind, balancing drum（6）It is mounted on main shaft（1）On, and balancing drum（6）One side end face and axle sleeve（3）End contact,
Balance set（5）Inner circle and balancing drum（6）It is connected between cylindrical by nested mode, balance set（5）Pass through positioning screw（4）Gu
Dingan County is loaded on pump water exit end, installs balancing drum（6）Main shaft（1）Upper correct position sets step and mechanical position limitation mechanism（7）Gu
Due to main shaft（1）Step at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720706482.1U CN206816543U (en) | 2017-06-18 | 2017-06-18 | A kind of combined multi-stage centrifugal pump axial thrust balancing devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720706482.1U CN206816543U (en) | 2017-06-18 | 2017-06-18 | A kind of combined multi-stage centrifugal pump axial thrust balancing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206816543U true CN206816543U (en) | 2017-12-29 |
Family
ID=60760002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720706482.1U Expired - Fee Related CN206816543U (en) | 2017-06-18 | 2017-06-18 | A kind of combined multi-stage centrifugal pump axial thrust balancing devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206816543U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185221A (en) * | 2018-10-23 | 2019-01-11 | 丹东克隆集团有限责任公司 | Become balance diameter, spring full protection type double mechanical seal |
| CN111300333A (en) * | 2020-04-07 | 2020-06-19 | 重庆江增船舶重工有限公司 | Mixed-flow turbocharger shaft sleeve mounting tool and method |
-
2017
- 2017-06-18 CN CN201720706482.1U patent/CN206816543U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185221A (en) * | 2018-10-23 | 2019-01-11 | 丹东克隆集团有限责任公司 | Become balance diameter, spring full protection type double mechanical seal |
| CN109185221B (en) * | 2018-10-23 | 2023-10-20 | 丹东克隆集团有限责任公司 | Double-end-face mechanical seal with balanced diameter and full protection of spring |
| CN111300333A (en) * | 2020-04-07 | 2020-06-19 | 重庆江增船舶重工有限公司 | Mixed-flow turbocharger shaft sleeve mounting tool and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171229 Termination date: 20210618 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |