CN214577913U - Volute structure - Google Patents
Volute structure Download PDFInfo
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- CN214577913U CN214577913U CN202022784582.0U CN202022784582U CN214577913U CN 214577913 U CN214577913 U CN 214577913U CN 202022784582 U CN202022784582 U CN 202022784582U CN 214577913 U CN214577913 U CN 214577913U
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Abstract
The utility model relates to a volute structure, which comprises a lower volute, an impeller nut, an upper volute, a mechanical sealing structure, a rotating shaft and an exhaust valve; the upper volute is positioned above the lower volute, and the lower volute and the upper volute are fixed together through a fixing device; the impeller is arranged on the rotating shaft; the liquid inlet is positioned on the upper volute; the liquid outlet is positioned on the lower volute; the impeller is positioned in the lower volute; the rotating shaft penetrates through the upper volute and the lower volute; the accommodating chamber of the upper volute is larger than that of the lower volute; the top height of the upper part of the upper volute is higher than the top height of the liquid inlet. The utility model discloses there is lower reliability phenomenon of cavitation, mechanical seal damage, bearing life low grade to present pump trade single-stage centrifugal pump, the utility model relates to a novel single-stage centrifugal pump spiral case structure can solve the reliability problem that single-stage centrifugal pump produced better. The volute structure improves the performance of the whole pump, is simple and efficient to process and manufacture, and reduces the comprehensive cost.
Description
Technical Field
The utility model relates to a spiral case structure, concretely relates to simple high efficiency of processing, compact structure, simple to operate can improve single-stage centrifugal pump comprehensive reliability's spiral case structure.
Background
At present, a volute structure of a single-stage centrifugal pump is a spiral structure, and the volute structure can better collect high-pressure water generated by an impeller acting, but the volute structure is complex to process, and the processing precision is not high, so that the external design characteristics of the centrifugal pump are influenced. The traditional volute structure is a horizontal structure and a vertical structure, an inlet and an outlet of the volute are on the same horizontal line or the inlet is arranged below the outlet, the impeller is easy to generate cavitation erosion, the hydraulic loss of the pump is increased, the lift and the efficiency of the pump are reduced, and meanwhile, the axial force generated by the rotation of the impeller influences the reliability of a rotor system. Most of the faults of the current centrifugal pump are caused by damage of mechanical seals, and the mechanical seals are designed by the prior volute and are mostly arranged in a high-pressure area of fluid and bear the impact of higher pressure. This novel spiral case structure can avoid above shortcoming, through the fine above problem of solving of this structure, simultaneously, the simple high efficiency of processing of upper and lower spiral case improves single-stage centrifugal pump's safe and reliable performance.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a volute structure with simple and efficient processing, compact structure, easy installation, and improved comprehensive reliability of single-stage centrifugal pump.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: a volute structure, comprising: the device comprises a lower volute, an impeller nut, an upper volute, a mechanical sealing structure, a rotating shaft and an exhaust valve; the upper volute is positioned above the lower volute, and the lower volute and the upper volute are fixed together through a fixing device; the impeller is arranged on the rotating shaft; the liquid inlet is positioned on the upper volute; the liquid outlet is positioned on the lower volute; the impeller is positioned in the lower volute; the rotating shaft passes through the upper volute and the lower volute.
The accommodating chamber of the upper volute is larger than that of the lower volute; the top height of the upper part of the upper volute is higher than the top height of the liquid inlet.
In an embodiment of the present invention, the exhaust valve is installed above the upper volute.
In an embodiment of the present invention, the exhaust valve is installed above the upper volute and near the rotating shaft.
In a specific embodiment of the present invention, the impeller is mounted on the rotating shaft through an impeller nut.
In the embodiment of the present invention, the upper volute and the lower volute are fixed together by a screw and nut combination structure.
In a specific embodiment of the present invention, the mechanical seal structure is a rubber seal.
In the embodiment of the present invention, the thickness range of the rubber sealing ring is: 1.0-6.0 mm.
In a specific embodiment of the present invention, the thickness range of the upper volute is: 6.0-30.0 mm.
In a specific embodiment of the present invention, the thickness range of the lower volute casing is: 6.0-30.0 mm.
The utility model discloses an actively advance the effect and lie in: the utility model provides a volute structure exists cavitation, mechanical seal to damage, the lower reliability phenomenon of bearing life-span low grade to present pump trade single-stage centrifugal pump, the utility model relates to a novel single-stage centrifugal pump volute structure can solve the reliability problem that single-stage centrifugal pump produced better. The volute structure improves the performance of the whole pump, is simple and efficient to process and manufacture, and reduces the comprehensive cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The utility model discloses the name that well reference numeral corresponds:
the device comprises a lower volute 1, an impeller 2, an impeller nut 3, an upper volute 4, a mechanical sealing structure 5, a rotating shaft 6, an exhaust valve 7, a liquid inlet 8 and a liquid outlet 9.
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
Fig. 1 is a schematic structural diagram of the present invention, as shown in the above figure: the utility model provides a spiral case structure, include: the device comprises a lower volute 1, an impeller 2, an impeller nut 3, an upper volute 4, a mechanical sealing structure 5, a rotating shaft 6 and an exhaust valve 7; the upper volute 4 is positioned above the lower volute 1, and the lower volute 1 and the upper volute 4 are fixed together through a fixing device; the impeller 2 is arranged on the rotating shaft 6; the liquid inlet 8 is positioned on the upper volute 4; the liquid outlet 9 is positioned on the lower volute 1; the impeller 2 is positioned in the lower volute 1; the rotating shaft 6 passes through the upper volute 4 and the lower volute 1.
The accommodating chamber of the upper volute 4 is larger than that of the lower volute 1; the top height of the upper part of the upper volute 4 is higher than that of the liquid inlet 8, and the exhaust valve 7 is installed above the upper volute 4.
The utility model provides a discharge valve 7 installs the position that is close to pivot 6 in the top of last spiral case 4.
The utility model provides an impeller 2 installs in pivot 6 through impeller nut 3, also can adopt other mounting means in specific implementation process.
The utility model provides an go up spiral case 4 and spiral case 1 down and be in the same place through the structure fixation of screw nut combination, the utility model provides a mechanical seal structure can be rubber seal.
The utility model discloses in can set for the thickness of last spiral case 4 and be greater than or equal to the thickness of spiral case 1 down. The utility model discloses an in the concrete implementation, rubber seal's thickness scope can be selected as: 1.0-6.0 mm. The thickness range of the upper volute 4 can be selected as follows: 6.0-30.0 mm. The thickness range of the lower volute 1 can be selected as follows: 6.0-30.0 mm. The above parameters may be adjusted as desired.
In the specific implementation process, the thickness of the rubber ring of the mechanical seal is 1.0-6.0mm according to the design pressure of 0.6-3 MPa, and the thickness of the upper volute and the lower volute is basically the same for casting convenience and has the value of 6.0-30.0mm according to the design pressure of 0.6-3 MPa of the existing centrifugal pump.
The utility model provides a novel subdivision formula spiral case structure of single-stage centrifugal pump, concretely relates to simple high efficiency, compact structure, simple to operate of processing improve the spiral case structure of single-stage centrifugal pump comprehensive reliability ability. The accommodating chamber of the upper volute 4 is larger than that of the lower volute 1; the top height of the upper part of the upper volute 4 is higher than the top height of the liquid inlet 8. The exhaust valve 7 is installed above the upper scroll 4. The structure has the outstanding characteristic that the water inlet is arranged above the water outlet, so that gas in liquid is separated out before entering the impeller, the cavitation erosion of the impeller of the centrifugal pump is prevented, and the damage of the cavitation erosion of the impeller is reduced. Meanwhile, the upper volute has a certain cavity structure, so that the flow state of water flowing into the impeller is more stable. The mechanical seal of the volute structure is positioned in a water flow low-pressure area, so that the scouring of the seal is reduced, and the service life of the seal is prolonged. The inlet of the impeller is provided with water above due to the structural characteristics of the volute, the front cover plate and the rear cover plate of the impeller are asymmetric (the pressure area of the front cover plate of the impeller is smaller than that of the rear cover plate due to the existence of the inlet, so that the front cover plate and the rear cover plate of the impeller are asymmetric) to generate an axial force in the direction from the rear cover plate to the front cover plate, and the generation of the axial force offsets a part of gravity, so that the axial force is reduced, and the service life of the bearing is prolonged. The opening area of the lower volute is large, the lower volute is simpler and more efficient to process and manufacture, the structure is compact, and the comprehensive cost is reduced.
The utility model discloses there is lower reliability phenomenon of cavitation, mechanical seal damage, bearing life low grade to present pump trade single-stage centrifugal pump, the utility model relates to a novel single-stage centrifugal pump spiral case structure can solve the reliability problem that single-stage centrifugal pump produced better. The volute structure improves the performance of the whole pump, is simple and efficient to process and manufacture, and reduces the comprehensive cost.
In the specific implementation process of the utility model, the accommodating chamber of the upper volute 4 is larger than that of the lower volute 1; the top height of the upper part of the upper volute 4 is higher than the top height of the liquid inlet 8. The exhaust valve 7 is installed above the upper scroll 4. Above-mentioned structure makes volute structure go up the spiral case and has certain exhaust and the effect of balanced import pressure, goes up the spiral case and is the centrifugal pump import simultaneously in the middle of the work, and the spiral case is the centrifugal pump export down, prevents the production of cavitation and makes the impeller import flow state more stable. The volute structure increases the anti-cavitation performance, changes the installation mode of the mechanical seal (the installation in a high-pressure area is changed into the installation in a low-pressure area), and protects the service life of the impeller and the mechanical seal to a certain extent. The structure has the advantages of convenient installation, compact structure and reduced production cost.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (9)
1. A volute structure, comprising: the volute structure includes: the device comprises a lower volute, an impeller nut, an upper volute, a mechanical sealing structure, a rotating shaft and an exhaust valve; the upper volute is positioned above the lower volute, and the lower volute and the upper volute are fixed together through a fixing device; the impeller is arranged on the rotating shaft; the liquid inlet is positioned on the upper volute; the liquid outlet is positioned on the lower volute; the impeller is positioned in the lower volute; the rotating shaft penetrates through the upper volute and the lower volute;
the accommodating chamber of the upper volute is larger than that of the lower volute; the top height of the upper part of the upper volute is higher than the top height of the liquid inlet.
2. The volute structure of claim 1, wherein: the exhaust valve is installed above the upper volute.
3. The volute structure of claim 2, wherein: the exhaust valve is arranged above the upper volute and close to the rotating shaft.
4. The volute structure of claim 1, wherein: the impeller is installed on the rotating shaft through an impeller nut.
5. The volute structure of claim 1, wherein: the upper volute and the lower volute are fixed together through a screw and nut combined structure.
6. The volute structure of claim 1, wherein: the mechanical sealing structure is a rubber sealing ring.
7. The volute structure of claim 1, wherein: the thickness range of the rubber sealing ring is as follows: 1.0-6.0 mm.
8. The volute structure of claim 1, wherein: the thickness range of the upper volute is as follows: 6.0-30.0 mm.
9. The volute structure of claim 1, wherein: the thickness range of the lower volute is as follows: 6.0-30.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022784582.0U CN214577913U (en) | 2020-11-26 | 2020-11-26 | Volute structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022784582.0U CN214577913U (en) | 2020-11-26 | 2020-11-26 | Volute structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214577913U true CN214577913U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022784582.0U Active CN214577913U (en) | 2020-11-26 | 2020-11-26 | Volute structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343863A (en) * | 2020-11-26 | 2021-02-09 | 上海凯泉泵业（集团）有限公司 | Volute structure |
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2020
- 2020-11-26 CN CN202022784582.0U patent/CN214577913U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343863A (en) * | 2020-11-26 | 2021-02-09 | 上海凯泉泵业（集团）有限公司 | Volute structure |
| CN112343863B (en) * | 2020-11-26 | 2024-05-14 | 上海凯泉泵业（集团）有限公司 | Volute structure |
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