CN2816440Y - Axial-force balancing structure of multi-stage centrifugal pump - Google Patents
Axial-force balancing structure of multi-stage centrifugal pump Download PDFInfo
- Publication number
- CN2816440Y CN2816440Y CN 200520022494 CN200520022494U CN2816440Y CN 2816440 Y CN2816440 Y CN 2816440Y CN 200520022494 CN200520022494 CN 200520022494 CN 200520022494 U CN200520022494 U CN 200520022494U CN 2816440 Y CN2816440 Y CN 2816440Y
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- pump
- high pressure
- pressure water
- gimbal
- balance disc
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of axial force in multi-stage centrifugal pump equilibrium structure, it is characterized in that on the high pressure water extrusion locular wall of pump, having a high pressure water irrigating gate, leave certain interval between Balance disc and the gimbal, form a pressure chamber, the close palace of the U type runner that the outside, pressure chamber has the control high pressure water to flow out, the close palace of U type runner is connected with backwater cavity, and an outlet pipe is arranged on the backwater cavity, outlet pipe is connected with return pipe, and return pipe is connected with the water intake of pump again.The utility model is simple in structure, and is easy for installation, stable performance, and the Balance disc that can prevent multistage centrifugal pump fully abuts in dry friction takes place on the gimbal, prolongs the working life of pump, guarantees production safety.
Description
Technical field
The utility model relates to a kind of axial force balance structure of the multistage centrifugal pump of carrying liquid, particularly pump.
Background technique
When multistage centrifugal pump rotates, produce bigger axial force on axle, this axial force will spur the rotor generation and move axially, therefore, and must balance or elimination axial force.In existing multistage centrifugal pump, many employing Balance discs are axial force balance structure, this equilibrium structure is made of the gimbal that is fixed on the Balance disc on the main shaft and be fixed on the pump housing, certain interval is arranged between Balance disc and the gimbal, when the multistage centrifugal pump work, do not contact between Balance disc and the gimbal working surface, the two can not rub.But because design is improper, reasons such as assembling, ambient condition or technological fluctuation, during axial force that Balance disc is produced in the time of can not equilbrium running, axial force will spur the rotor generation and move axially, make Balance disc unbalance and abut on the gimbal, dry friction is given birth in Balance disc and balance environment-development, cause the heavy wear of Balance disc and gimbal, also can cause simultaneously running wheel and body in the pump wearing and tearing, reach the damage of other parts, maintenance load is increased, centrifugal pump shortening in working life threatens production safety.
The model utility content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of novel axial force in multi-stage centrifugal pump equilibrium structure is provided, and prevents from that Balance disc from abutting in dry friction takes place on the gimbal, prolongs the working life of pump, guarantees production safety.
The utility model is realized its purpose as follows: described axial force in multi-stage centrifugal pump equilibrium structure comprises the pump housing, impeller, the pump main shaft, axially protect setting sleeve, water inlet, the high pressure water delivery chamber, the pump main shaft is a floating axle, can move axially, it is characterized in that on the high pressure water extrusion locular wall of pump, having a high pressure water irrigating gate, leave certain interval between Balance disc and the gimbal, form a pressure chamber, the close palace of the U type runner that has the control high pressure water to flow out in the outside of pressure chamber, the close palace of U type runner is connected with backwater cavity, an outlet pipe is arranged on the backwater cavity, outlet pipe is connected with return pipe, and return pipe is connected with the water intake of pump again; Be positioned at ring-type U-shaped groove on the Balance disc working surface outer rim and the wedge shape projection on the gimbal working surface outer rim and be nested, the close palace of formation U type, the interval runner that leaves between wedge shape projection and the U type groove; A ring-like axial seal is arranged between backwater cavity and the pump main shaft, a radial seal is arranged between the gimbal and the pump housing.When the moving commentaries on classics of multistage centrifugal pump, the high pressure water delivery chamber of pump produces high pressure water, at this moment, the high pressure water irrigating gate that the high pressure water of pump extrudes on the locular wall is introduced pressure chamber between Balance disc and the gimbal by runner with high pressure water, Balance disc is open under the pressure effect of high pressure water, forms liquid lubrication between Balance disc and the gimbal.The high pressure water that flows out from the pressure chamber is by the close palace of U type runner, backwater cavity, outlet pipe, the return pipe water intake of inflow pump again.When the centrifugal pump proper functioning, the balanced action of Balance disc is constant substantially; When Balance disc unbalance and can not balancing axial thrust the time, Balance disc is close to gimbal under the effect of axial force, wedge shape projection on ring-type U-shaped groove on the Balance disc working surface outer rim and the gimbal working surface outer rim is also close gradually, the close palace of U type runner is closed gradually, the runner section reduces gradually, at this moment, the high pressure water flow that flows out from the pressure chamber reduces gradually, it is not smooth to circulate, the pressure that high pressure water produced in the pressure chamber sharply increases, and the equilibrant opposite with axial force that forms on the Balance disc working surface also sharply increases.When Balance disc working surface and gimbal working surface when near more, the close palace of U type runner is closed more, the runner section is more little, the pressure that high pressure water produced in the pressure chamber is big more, the equilibrant that is produced is also big more, thereby reaches balancing axial thrust, the Balance disc that prevents contacts with the gimbal working surface and the purpose of friction takes place.When the pump axial force was little, main shaft moved right, and maze type runner cross-sectional area increases, and resistance reduces, and flow increases, and pressure chamber's pressure reduces, and it is suitable with axial force that equilibrant is decreased to, mutually balance.
The utlity model has following advantage and extremely long-pending effect: simple in structure, easy for installation, stable performance, the Balance disc that can prevent multistage centrifugal pump fully abuts in dry friction takes place on the gimbal, prevent the wearing and tearing of running wheel and body, prolong the working life of pump, guarantee production safety.
Description of drawings
Fig. 1 is the multistage centrifugal pump structural representation with the utility model structure;
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is a gimbal sectional drawing of the present utility model;
Fig. 4 is a gimbal planimetric map of the present utility model
Fig. 5 is a Balance disc sectional drawing of the present utility model;
Fig. 6 is a Balance disc planimetric map of the present utility model
Fig. 7 is an axial protection setting sleeve sectional drawing of the present utility model;
Fig. 8 is an axial protection setting sleeve planimetric map of the present utility model.
Embodiment
The embodiment who provides below in conjunction with accompanying drawing is described further the utility model.1 is the water intake of pump among the figure, and 2 is impeller, and 3 is the pump housing, and 4 is return pipe; 5 is the high pressure water runner, and 6 is the high pressure water irrigating gate, the high pressure water delivery chamber of 7 pumps, and 8 is the high pressure water shaft orientation flowing channel; 9 is axially to protect setting sleeve, and 10 are radial seal, and 11 is fixing bolt, and 12 is gimbal; wedge shape projection on 13 gimbals, 14 outlet pipes, 15 is the close palace of U type runner; 16 is the U type groove on the Balance disc, and 17 is backwater cavity, and 18 is Balance disc; 19 is the pressure chamber, and 20 are axial seal, and 21 is the pump main shaft.
When the moving commentaries on classics of multistage centrifugal pump, the high pressure water delivery chamber 7 of pump produces high pressure water and flows out, at this moment, high pressure water irrigating gate 6 on high pressure water delivery chamber 7 walls of pump is introduced high pressure water in the pressure chamber 19 between Balance disc 18 and the gimbal 12 by high pressure water runner 5 and high pressure water shaft orientation flowing channel 8, Balance disc 18 is open under the pressure effect of high pressure water, forms liquid lubrication between Balance disc 18 and the gimbal 12.19 high pressure waters that flow out are by the close palace of U type runner 15, backwater cavity 17, outlet pipe 14, return pipe 4 water intake 1 of inflow pump again from the pressure chamber.When the multistage centrifugal pump proper functioning, the balanced action of Balance disc 18 is constant substantially; When Balance disc 18 unbalance and can not balancing axial thrust the time, Balance disc 18 is close to gimbal 12 under the effect of axial force, annular groove 16 on the working surface outer rim of Balance disc 18 is also close gradually with the wedge shape projection 13 on the gimbal 12 working surface outer rims, the close palace of U type runner 15 is closed gradually, the runner section reduces gradually, at this moment, the high pressure water flow that flows out from pressure chamber 19 reduces gradually, it is not smooth to circulate, the pressure that high pressure water produced in the pressure chamber 19 sharply increases, and the equilibrant opposite with axial force that forms on the working surface of Balance disc 18 also sharply increases.When the working surface of the working surface of Balance disc 18 and gimbal 12 when near more, the close palace of U type runner 15 is closed more, the runner section is more little, the pressure that high pressure water produced in the pressure chamber 19 is big more, the equilibrant that is produced is also big more, thereby reaches balancing axial thrust, the Balance disc 18 that prevents contacts with gimbal 12 working surfaces and the purpose of friction takes place.
Claims (3)
1; a kind of axial force in multi-stage centrifugal pump equilibrium structure; comprise the pump housing (3); impeller (2); pump main shaft (21); axially protect setting sleeve (9); the water intake of pump (1); high pressure water delivery chamber (7); it is characterized in that on the wall of the high pressure water delivery chamber (7) of pump, having a high pressure water irrigating gate (6); leave certain interval between Balance disc (18) and the gimbal (12); form a pressure chamber (19); there is the close palace of the U type runner (15) that the control high pressure water flows out in the outside of (19) in the pressure chamber; the close palace of U type runner (15) is connected with backwater cavity (17); an outlet pipe (14) is arranged on the backwater cavity (17); outlet pipe (14) is connected with return pipe (4), and return pipe (4) is connected with the water intake (1) of pump again.
2, axial force balance structure according to claim 1, it is characterized in that being positioned at wedge shape protruding (13) on annular U type groove (16) and gimbal (12) the working surface outer rim on Balance disc (18) the working surface outer rim rises and is nested the interval formation U type close palace runner (15) that leaves between wedge shape projection (13) and the U type groove (16).
3, axial force balance structure according to claim 1 is characterized in that between backwater cavity (17) and the pump main shaft (21) a ring-like axial seal (20) being arranged, and between the gimbal (12) and the pump housing (3) radial seal (10) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520022494 CN2816440Y (en) | 2005-06-06 | 2005-06-06 | Axial-force balancing structure of multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520022494 CN2816440Y (en) | 2005-06-06 | 2005-06-06 | Axial-force balancing structure of multi-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2816440Y true CN2816440Y (en) | 2006-09-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520022494 Expired - Fee Related CN2816440Y (en) | 2005-06-06 | 2005-06-06 | Axial-force balancing structure of multi-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2816440Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108035883A (en) * | 2017-11-30 | 2018-05-15 | 浙江理工大学 | Study the mechanics experimental apparatus and method in centrifugal multistage pump multiple centrifugal pump front shroud of impeller gap |
| CN114326627A (en) * | 2021-12-29 | 2022-04-12 | 哈尔滨工业大学芜湖机器人产业技术研究院 | Pump shaft digital production line system |
-
2005
- 2005-06-06 CN CN 200520022494 patent/CN2816440Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108035883A (en) * | 2017-11-30 | 2018-05-15 | 浙江理工大学 | Study the mechanics experimental apparatus and method in centrifugal multistage pump multiple centrifugal pump front shroud of impeller gap |
| CN108035883B (en) * | 2017-11-30 | 2023-11-28 | 浙江理工大学 | Dynamics experiment device and method for researching gap of front cover plate of impeller of multistage centrifugal pump |
| CN114326627A (en) * | 2021-12-29 | 2022-04-12 | 哈尔滨工业大学芜湖机器人产业技术研究院 | Pump shaft digital production line system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |