CN2869405Y - Axial force balance device for pump - Google Patents
Axial force balance device for pump Download PDFInfo
- Publication number
- CN2869405Y CN2869405Y CN 200520046326 CN200520046326U CN2869405Y CN 2869405 Y CN2869405 Y CN 2869405Y CN 200520046326 CN200520046326 CN 200520046326 CN 200520046326 U CN200520046326 U CN 200520046326U CN 2869405 Y CN2869405 Y CN 2869405Y
- Authority
- CN
- China
- Prior art keywords
- pump
- sealing ring
- end plate
- pressure
- vane wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
A axial force equilibrator of pump comprising a pump body, a pump shaft and a vane wheel, wherein the vane wheel comprises a connection of front end plate and rear end plate, a cavity is arranged between front end plate and rear end plate, a front sealing ring is arranged on the front end plate and the rear sealing ring is arranged on rear end plate, the circular clearance is kept between rear sealing ring and pump body inner cavity, at least one equalizing hole is arranged on rear end plate, the sectional total area of equalizing hole is 3-6 times of sectional area of circular clearance. The circular clearance can make the pressure in front cavity of vane wheel as same as pressure in rear cavity of vane wheel, when liquid flowing the circular clearance, the pressure after sealing ring is dropped, now the equalizing hole on rear end plate can make the pressure in rear cavity of vane wheel as same as pressure in inlet of vane wheel to balance the pressure in front and rear vane wheel and balance further the equilibration of axial force. The utility model has the advantages of simple structure, decreased volume and weight of pump, best counterbalance effect and reliability of operation.
Description
Technical field:
The utility model relates to fluid conveying machine, relates in particular to pump, particularly a kind of axial thrust balancing devices that is used for pump.
Background technique:
Pump is in operation, and impeller produces thrust to rotor, and thrust makes rotor generation axial float, causes pump operation instability, unreliable, and the life-span of pump reduces.Use thrust bearing to come balancing axial thrust in the prior art, but only be applicable to miniature pump, under the bigger situation of the axial force of pump, the work effect of thrust bearing is undesirable.
Summary of the invention:
The purpose of this utility model provides a kind of axial thrust balancing devices that is used for pump, and the described this axial thrust balancing devices that is used for pump will solve prior art, the unfavorable technical problem of thrust bearing work effect under the big situation of pump axial force.
This axial thrust balancing devices of pump that is used for of the present utility model is by the pump housing, pump shaft and an impeller constitute, described impeller all is arranged on the pump shaft, pump shaft and described impeller all are arranged in the pump housing, described impeller is connected and composed by a front shroud and a back shroud, be provided with cavity between front shroud and the back shroud, wherein, described front shroud is provided with outstanding forward preceding seal ring, the diameter of described preceding seal ring matches with pump housing inner chamber on every side, described back shroud is provided with rearwardly projecting increasing back sealing ring, the diameter of described increasing back sealing ring matches with on every side pump housing inner chamber, be provided with the annular space between described increasing back sealing ring and the pump housing inner chamber on every side, connect on the described back shroud and be provided with at least one equalizing orifice, the gross area in the cross section of described equalizing orifice is 3～6 times of section area of described annular space.
Further, the diameter of seal ring before the diameter of described increasing back sealing ring equals.
Working principle of the present utility model is: form annular space radially between the increasing back sealing ring of back shroud of impeller and the pump housing, make the pressure of impeller front cavity identical with the pressure of impeller back cavity, when flow of liquid during through the annular space, the pressure at seal ring rear portion descends, equalizing orifice on the back shroud makes the pressure of impeller back cavity identical with the pressure at impeller inlet place, thereby balance the balance of pressure before and after the impeller, and further balance axial force.
The utility model and prior art contrast, and effect is positive and tangible.The utility model is set up the seal ring structure of overshooting shape and is offered equalizing orifice on the back shroud of each impeller, it is simple in structure, has reduced the volume and weight of pump, and good balance effect, the maintainability height.
Description of drawings:
Fig. 1 is the structural representation that is used for the axial thrust balancing devices of pump of the present utility model.
Embodiment:
As shown in Figure 1, the axial thrust balancing devices that is used for pump of the present utility model, by the pump housing 1, pump shaft 2 and an impeller 3 constitute, described impeller 3 all is arranged on the pump shaft 2, pump shaft 2 and described impeller 3 all are arranged in the pump housing 1, described impeller 3 is connected and composed by a front shroud 31 and a back shroud 32, be provided with cavity between front shroud 31 and the back shroud 32, wherein, described front shroud 31 is provided with outstanding forward preceding seal ring 33, the diameter of described preceding seal ring 33 matches with the pump housing 1 inner chamber on every side, described back shroud 32 is provided with rearwardly projecting increasing back sealing ring 34, the diameter of described increasing back sealing ring 34 matches with 1 inner chamber of the pump housing on every side, be provided with the annular space between described increasing back sealing ring 34 and 1 inner chamber of the pump housing on every side, connect on the described back shroud 32 and be provided with at least one equalizing orifice 35, the gross area in the cross section of described equalizing orifice 35 is 3～6 times of section area of described annular space.
Further, the diameter of seal ring 33 before the diameter of described increasing back sealing ring 34 equals.
Claims (2)
1. axial thrust balancing devices that is used for pump, by the pump housing, pump shaft and an impeller constitute, described impeller all is arranged on the pump shaft, pump shaft and described impeller all are arranged in the pump housing, described impeller is connected and composed by a front shroud and a back shroud, be provided with cavity between front shroud and the back shroud, it is characterized in that: described front shroud is provided with outstanding forward preceding seal ring, the diameter of described preceding seal ring matches with pump housing inner chamber on every side, described back shroud is provided with rearwardly projecting increasing back sealing ring, the diameter of described increasing back sealing ring matches with on every side pump housing inner chamber, be provided with the annular space between described increasing back sealing ring and the pump housing inner chamber on every side, connect on the described back shroud and be provided with at least one equalizing orifice, the gross area in the cross section of described equalizing orifice is 3～6 times of section area of described annular space.
2. the axial thrust balancing devices that is used for pump as claimed in claim 1 is characterized in that: the diameter of seal ring before the diameter of described increasing back sealing ring equals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046326 CN2869405Y (en) | 2005-11-07 | 2005-11-07 | Axial force balance device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520046326 CN2869405Y (en) | 2005-11-07 | 2005-11-07 | Axial force balance device for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2869405Y true CN2869405Y (en) | 2007-02-14 |
Family
ID=37724341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520046326 Expired - Fee Related CN2869405Y (en) | 2005-11-07 | 2005-11-07 | Axial force balance device for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2869405Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678614A (en) * | 2012-04-06 | 2012-09-19 | 江苏大学 | Multistage centrifugal pump with completely balanced axial force of impeller |
| CN104061172A (en) * | 2013-03-20 | 2014-09-24 | 上海宝钢工业技术服务有限公司 | Atomizing air blower |
| CN105443447A (en) * | 2014-09-24 | 2016-03-30 | 杭州三花研究院有限公司 | Electronic pump |
| CN107725468A (en) * | 2017-10-30 | 2018-02-23 | 南京磁谷科技有限公司 | A kind of impeller back seal structure |
| CN108496010A (en) * | 2015-12-07 | 2018-09-04 | 流体处理有限责任公司 | Opposed type impeller abrasion-proof ring for offsetting the axial thrust generated in multistage pump is undercut |
| CN113883084A (en) * | 2021-09-01 | 2022-01-04 | 浙江大学 | Automatic axial force balancing device of magnetic suspension centrifugal pump under high-power working condition and application |
-
2005
- 2005-11-07 CN CN 200520046326 patent/CN2869405Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678614A (en) * | 2012-04-06 | 2012-09-19 | 江苏大学 | Multistage centrifugal pump with completely balanced axial force of impeller |
| CN104061172A (en) * | 2013-03-20 | 2014-09-24 | 上海宝钢工业技术服务有限公司 | Atomizing air blower |
| CN105443447A (en) * | 2014-09-24 | 2016-03-30 | 杭州三花研究院有限公司 | Electronic pump |
| CN105443447B (en) * | 2014-09-24 | 2019-03-01 | 浙江三花汽车零部件有限公司 | Electronic pump |
| CN108496010A (en) * | 2015-12-07 | 2018-09-04 | 流体处理有限责任公司 | Opposed type impeller abrasion-proof ring for offsetting the axial thrust generated in multistage pump is undercut |
| CN108496010B (en) * | 2015-12-07 | 2021-04-02 | 流体处理有限责任公司 | Opposed impeller wear ring undercut for counteracting axial thrust generated in a multistage pump |
| CN107725468A (en) * | 2017-10-30 | 2018-02-23 | 南京磁谷科技有限公司 | A kind of impeller back seal structure |
| CN113883084A (en) * | 2021-09-01 | 2022-01-04 | 浙江大学 | Automatic axial force balancing device of magnetic suspension centrifugal pump under high-power working condition and application |
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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: 20070214 Termination date: 20101107 |