CN202991653U - Tri-diffusion tube spiral case structure balancing the radial bearing force on centrifugal pump - Google Patents
Tri-diffusion tube spiral case structure balancing the radial bearing force on centrifugal pump Download PDFInfo
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- CN202991653U CN202991653U CN 201220107821 CN201220107821U CN202991653U CN 202991653 U CN202991653 U CN 202991653U CN 201220107821 CN201220107821 CN 201220107821 CN 201220107821 U CN201220107821 U CN 201220107821U CN 202991653 U CN202991653 U CN 202991653U
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- diffusing
- centrifugal pump
- diffusing tube
- spiral case
- tube
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Abstract
The utility model discloses a tri-diffusion tube spiral case structure balancing the radial bearing force on a centrifugal pump including a first diffuser tube (2), a second diffuser tube (2), and a third diffuser tube (2), each two of which are arranged at a 120 degree angle. Three spiral case outlets convey liquid to a common pump outlet through pipes. The tri-diffusion tube spiral case structure balances the radial bearing force on a centrifugal pump, and makes the centrifugal pump running more stable. Liquid can be conveyed to a plurality of outlets.
Description
Technical field
The utility model relates to a kind of centrifugal pump spiral casing structure, particularly makes three diffusing tube spiral cases of centrifugal pump radial force balance.
Background technique
As important energy conversion device and conveying equipment for fluid substances, centrifugal pump is applied in the every field of national economy widely.Traditional centrifugal pump spiral casing structure as shown in Figure 1, is single cut water list volute casing.Under design discharge, the pressure around impeller is uniformly, and the pressure right and wrong under non-design discharge around impeller are equally distributed, thereby must form a time dependent radial force of big or small direction on impeller.The centrifugal pump internal flow is complicated three-dimensional non-steady turbulent flow, often affect the phenomenon of centrifugal pump stable operation characteristic with flow separation, cavitation, hydraulic vibration etc., and these wild effects usually cause the generation of centrifugal pump radial force, jiggly radial force can cause perturbing of axle, and then causes the vibration of pump and affect sealing mechanism and the life-span of bearing.There are two cut waters of 180 ° of being separated by at two volute casing worm frames shown in Figure 2, can produce the opposite radial force of both direction, can well balance in theory, but due to the equal temporal evolution of the size and Orientation of radial force, and that the segmental arc of two cut waters is not easy to make is just the same, therefore can not reach complete equilibrium with the opposite radial force of both direction.Shown in Figure 3 arrange that a plurality of stators come the method for balance radial force can greatly reduce radial force at impeller in the runner between spiral case, but be subjected to the restriction of diffusing tube, increased the manufacturing installation cost, also strengthened the radial dimension of spiral case.
Through retrieval, the worm frame about making centrifugal pump radial force balance that this paper adopts does not have relevant report.
Summary of the invention
The purpose of this utility model is to solve the stressed imbalance problem of centrifugal pump running middle period wheel radial, thereby reduces the centrifugal pump flow-induced vibration, makes its operation more steady, increases the service life.
The technological scheme that its technical problem that solves the utility model adopts is: doubly several diffusing tubes of 3 are set, and described diffusing tube shape and structure is identical, is evenly arranged along the axle center of impeller; Comprise and be 120 ° of the first diffusing tube, the second diffusing tube, the 3rd diffusing tubes that differ layout; Three diffusing tube outlets are transported to different pump discharges with liquid by outer pipe, or pool together by a delivery side of pump output.Specifically comprise being 120 ° of the first diffusing tube, the second diffusing tube, the 3rd diffusing tubes that differ layout, the mode that becomes a plurality of cut waters in a spiral case is 3 diffusing tubes.The effect of the first diffusing tube, the second diffusing tube, the 3rd diffusing tube is to collect the liquid that flows out from impeller, and is transported to exhaust port.The purpose that a traditional spiral case diffusing tube is become three is make three cut waters manufacturings the same, thereby the radial force size of its generation too.Simultaneously, compare with the scheme of a plurality of cut waters in a spiral case diffusing tube, the utility model has dwindled the radial dimension of spiral case greatly.The diffusing tube number is three and to be 120 ° of purposes that differ layout be to make that radially equilibrium of forces is more stable, and it is zero that three radial forces of generation are made a concerted effort.After flowing through the impeller pressurization, liquid enters spiral case, three spiral cases are full of liquid simultaneously, because the feature of the first diffusing tube, the second diffusing tube, the 3rd diffusing tube is just the same, so liquid stream acts on and produces three equal-sized radial forces on three cut waters, because being 120 °, three radial forces differ layout, so it is zero that three radial forces are made a concerted effort in a plane, and reaches a state of equilibrium.With respect to the radial force of two big or small opposite directions, three equilibrium of forces are more stable.
The described worm frame of this specification is not limited only to 3 volute casings, and the thought of using a plurality of diffusing tubes of this even distribution to make the radial force of generation reach balance in a plane all can.
Working procedure is: fluid is pressurized throwing away after impeller inlet enters impeller, enter the first diffusing tube, the second diffusing tube, the 3rd diffusing tube, the different outer pipe of outlet connection by the first diffusing tube, the second diffusing tube, the 3rd diffusing tube is transported to respectively different pump discharges, or pools together by a delivery side of pump output.
The utility model has the advantage of: make centrifugal pump radial force balance, operate steadily, increase working life; Structure is not limited by runner, and easy processing is convenient; Do not increase the radial dimension of spiral case, more convenient in the application of multistage pump; Can carry liquid to different outlets by a pump.
Description of drawings
Fig. 1: traditional single cut water worm frame schematic diagram.
Fig. 2: two cut water worm frame schematic diagram.
Fig. 3: add the guide vane with spiral case structural representation.
Fig. 4: the worm frame figure that the utility model adopts.
The A-A sectional view of Fig. 5: Fig. 4.
In figure, 1, impeller; 2, the first diffusing tubes; 3, the second diffusing tubes; 4, the three diffusing tubes.
Embodiment
In Fig. 4, make the worm frame of centrifugal pump radial force balance, comprise that the first diffusing tube 2, the second diffusing tube 3,4, three diffusing tubes of the 3rd diffusing tube are 120 ° and differ layout.Three diffusing tube outlets are transported to different pump discharges with liquid by outer pipe, or pool together by a delivery side of pump output.
When liquid stream enters impeller by impeller 1 import, enter spiral case through throwing away after pressurization, the first diffusing tube 2, the second diffusing tube 3, the 3rd diffusing tube 4 have been full of liquid stream simultaneously.Liquid stream all has radial force to three spiral cases, but differs layout owing to being 120 °, and three radial forces reach balance at grade.
Claims (2)
1. three diffusing tube worm frames that make centrifugal pump radial force balance is characterized in that: doubly several diffusing tubes of 3 are set, and described diffusing tube shape and structure is identical, is evenly arranged along the axle center of impeller (1); Three diffusing tube outlets are transported to different pump discharges with liquid by outer pipe, or pool together by a delivery side of pump output.
2. a kind of three diffusing tube worm frames that make centrifugal pump radial force balance according to claim 1, it is characterized in that: 3 diffusing tubes are set, are 120 ° of the first diffusing tube (2), the second diffusing tube (3) and the 3rd diffusing tubes (4) that differ layout; Three diffusing tube outlets are transported to different pump discharges with liquid by outer pipe, or pool together by a delivery side of pump output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220107821 CN202991653U (en) | 2012-03-21 | 2012-03-21 | Tri-diffusion tube spiral case structure balancing the radial bearing force on centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220107821 CN202991653U (en) | 2012-03-21 | 2012-03-21 | Tri-diffusion tube spiral case structure balancing the radial bearing force on centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202991653U true CN202991653U (en) | 2013-06-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220107821 Expired - Lifetime CN202991653U (en) | 2012-03-21 | 2012-03-21 | Tri-diffusion tube spiral case structure balancing the radial bearing force on centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202991653U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606533A (en) * | 2012-03-21 | 2012-07-25 | 江苏大学 | Three-diffusion-tube volute structure enabling centrifugal pump to achieve radial force balance |
| CN106089802A (en) * | 2016-07-25 | 2016-11-09 | 武汉船用机械有限责任公司 | A kind of centrifugal pump casing |
-
2012
- 2012-03-21 CN CN 201220107821 patent/CN202991653U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606533A (en) * | 2012-03-21 | 2012-07-25 | 江苏大学 | Three-diffusion-tube volute structure enabling centrifugal pump to achieve radial force balance |
| CN106089802A (en) * | 2016-07-25 | 2016-11-09 | 武汉船用机械有限责任公司 | A kind of centrifugal pump casing |
| CN106089802B (en) * | 2016-07-25 | 2018-01-26 | 武汉船用机械有限责任公司 | A kind of centrifugal pump casing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |