CN210290158U - Plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance - Google Patents
Plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance Download PDFInfo
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- CN210290158U CN210290158U CN201921063408.8U CN201921063408U CN210290158U CN 210290158 U CN210290158 U CN 210290158U CN 201921063408 U CN201921063408 U CN 201921063408U CN 210290158 U CN210290158 U CN 210290158U
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Abstract
The utility model relates to a plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance, which comprises a horn pipe, a water guide cone, a plane volute and an impeller, wherein the inlet of the horn pipe is connected and communicated with the inclined plane of the plane volute, and the outlet of the horn pipe is connected and communicated with the impeller; a hub is fixed in the impeller, and 3 blades are fixed on the hub; the other end of the plane volute is connected and communicated with the water inlet flow channel; the bottom of the water guide cone is positioned outside the inlet of the horn tube, and the top of the water guide cone extends into the horn tube and is connected and fixed with the hub; the diameter of the inlet of the flared tube is 1.55 times of the diameter of the impeller, the diameter of the outlet of the flared tube is equal to the diameter of the impeller, and the height of the flared tube is 0.53 times of the diameter of the impeller; the diameter of the top circle of the water guide cone is 0.3 time of the diameter of the impeller, the diameter of the bottom circle of the water guide cone is 1.39 times of the diameter of the impeller, and the height of the water guide cone is 1.16 times of the diameter of the impeller. Through the utility model discloses, the vortex of the bottom of plane spiral case promptly impeller import is effectively eliminated to plane spiral case and guiding cone after the improvement.
Description
Technical Field
The utility model relates to a two-way runner of plane spiral case formula structure of intaking that hydraulic performance is excellent especially relates to two-way runner of intaking water guide awl and plane spiral case etc. and overflows the part, belongs to hydraulic engineering technical field.
Background
The bidirectional water inlet channel is controlled by the gate, can respectively feed water from any side of two sides of the pump station water inlet channel, is suitable for drainage and irrigation of flood season and irrigation and drainage and irrigation of dry season, can automatically drain and irrigate by utilizing the channel when water is not pumped, has the obvious advantages of less land occupation, less engineering amount saving, small engineering investment and the like, and is widely applied in engineering practice.
When water enters one side of the bidirectional water inlet channel, the other side of the bidirectional water inlet channel forms a dead water area with a large space due to the fact that the gate is closed, backflow and vortex are prone to being generated, hydraulic loss is increased, and due to the unreasonable channel molded line design, vortex is prone to being generated in the channel, a vortex band is formed and enters the impeller chamber to affect normal operation of the impeller, so that serious vibration and cavitation of the water pump are caused, the efficiency of the pump device is reduced, and safe and stable operation of the pump device is affected. In order to solve the problem, the utility model discloses a through the horizontal spiral case structure of intaking of the vertical axial-flow pump device of two-way runner, flow components such as water guide awl and plane spiral case improve, provide the design basis for selecting reasonable runner molded lines and the effective measure of confirming to eliminate the vortex area, have important meaning to pump assembly safety, stability, high-efficient operation.
SUMMERY OF THE UTILITY MODEL
The molded lines of the bidirectional water inlet flow channel are unreasonable in design, so that the efficiency of the pump device is low or the pump device vibrates, cavitates and the like, and the pump device is difficult to ensure good flow state and high efficiency in two running states of drainage and irrigation. In order to solve the above problem, the utility model discloses a through the two-way runner inlet structure of plane spiral case formula that hydraulic performance is excellent, utilize the water guide awl after the improvement effectively to eliminate the accessory bottom swirl of horn mouth below, under the prerequisite that guarantees that export flow characteristic satisfies the requirement of impeller chamber import, provide the two-way runner of intaking that the flow state is better, economical and reasonable.
The utility model aims at realizing like this, a two-way runner of plane spiral case formula structure of intaking that hydraulic performance is excellent, characterized by: the device comprises a horn pipe, a water guide cone, a plane volute and an impeller, wherein the inlet of the horn pipe is connected and communicated with the inclined surface of the plane volute, and the outlet of the horn pipe is connected and communicated with the impeller; a hub is fixed in the impeller, and blades are fixed on the hub; the other end of the plane volute is connected and communicated with the water inlet flow channel; the bottom of the water guide cone is positioned outside the inlet of the horn tube, and the top of the water guide cone extends into the horn tube and is fixedly connected with the hub;
the diameter of the inlet of the horn pipe is 1.55 times of the diameter of the impeller, the diameter of the outlet of the horn pipe is equal to the diameter of the impeller, the height of the horn pipe is 0.53 times of the diameter of the impeller, the diameter of the top circle of the water guide cone is 0.3 times of the diameter of the impeller, the diameter of the bottom circle of the water guide cone is 1.39 times of the diameter of the impeller, the height of the water guide cone is 1.16 times of the diameter of the impeller, the height of the section of the plane volute is 0.4 times of the diameter of the impeller, and the inclination angle α of the inclined plane of the.
The bus of the water guide cone adopts a quarter of elliptical arc line.
The number of the blades is 3.
The utility model discloses simple rational in infrastructure, easy, convenient to use are made in production, through the utility model discloses, the excellent two-way runner of plane spiral case formula structure of intaking of hydraulic performance that provides, be favorable to the analysis to study the two-way harmful phenomena such as desludging, swirl of two-way intake runner key position, be favorable to overflowing parts such as the plane spiral case structure of intaking and the guiding cone of the vertical axial-flow pump device of two-way runner and optimize and improve to reach the inside flow state of adjustment intake runner and the mesh of vortex elimination, reduce the hydraulic loss of intake runner, improve the hydraulic efficiency of the vertical axial-flow pump device of two-way runner, to the nearly wall department of the adverse water side of two-way intake runner easily appear the problem that the swirl influences impeller normal operating, provided the plane spiral case structure of intaking of the vertical axial-flow pump device of two-way runner, the utility model discloses a horn tube import diameter is 1.55D, horn tube export diameter is D, the height of water manifold is 0.53D the utility model the section diameter all uses impeller diameter D as the reference value the utility model discloses a section cone α.39D is the arc diameter at the end of the arc cone, the arc cone is 1.58.
Has the advantages that:
the utility model is suitable for an among the vertical axial-flow pump device water inflow structure of two-way runner, the bottom of plane spiral case and guiding cone after improving through the design effectively eliminate the plane spiral case is the vortex of the below of impeller import, for the impeller room import provides good hydraulic condition, effectively improve two-way intake runner's the export velocity of flow distribution degree of consistency, the hydraulic loss of intake runner has been reduced, the pump device maximum efficiency point has been improved, can provide certain reference for the hydraulic design of two-way intake runner of the same type pump device, carry out optimal design to two-way intake runner and guarantee that its safe operation has important academic meaning and engineering value.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic plan view of the present invention;
FIG. 3 is a view of the trumpet-shaped coil of the present invention;
FIG. 4 is a water guide cone curve diagram of the present invention;
FIG. 5 is a sectional view of the planar spiral casing of the present invention;
FIG. 6 is a schematic view of the usage state of the present invention;
in the figure: the device comprises a flared pipe 1, a water guide cone 2, a plane volute 3, an impeller 4, a water inlet flow channel 5, a hub 6 and blades 7.
Detailed Description
The invention will be further explained with reference to the drawings and the accompanying description.
A plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance comprises a horn tube 1, a water guide cone 2 and a plane volute 3. The inlet of the horn tube 1 is connected with the inclined surface of the plane volute 3, and the size of the outlet section of the horn tube 1 corresponds to that of the inlet section of the impeller 4; the diameter of the top circle of the water guide cone 2 corresponds to that of a hub 6 in the impeller 4; the plane volute 3 is connected with the water inlet flow passage 5. Namely, the plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance comprises a horn pipe 1, a water guide cone 2, a plane volute 3 and an impeller 4, wherein an inlet of the horn pipe 1 is connected and communicated with an inclined plane of the plane volute 3, and the other end of the plane volute 3 is connected and communicated with a water inlet flow channel 5; the bottom of the water guide cone 2 is positioned outside the inlet of the flared tube 1, and the top of the water guide cone 2 extends into the flared tube 1 and is fixedly connected with the hub 6.
If the diameter of the impeller 4 is D, the diameter of an inlet of the flared tube 1 is 1.55D, the diameter of an outlet of the flared tube 1 is D, the height of the flared tube 1 is 0.53D, the diameter of a top circle of the water guide cone 2 is 0.3 times D, the diameter of a bottom circle of the water guide cone 2 is 1.39D, the height of the water guide cone 2 is 1.16D, the height of a section of the planar volute 3 is 0.4D, the inclination angle α of a volute inclined plane of the planar volute 3 is 58 degrees, and a quarter of an elliptical arc line is adopted by a generatrix of the water guide cone 2.
The utility model provides a two-way runner of plane spiral case formula structure of intaking that hydraulic performance is excellent, the structure of intaking after the improvement can effectively eliminate the horn mouth below and attach end swirl, large-traffic operating mode (1.4)Q bep) Optimum working conditionsQ bep) Low flow regime (0.6)Q bep) No vortex is generated at the position close to the wall surface of the reverse water side of the bidirectional water inlet channel under three characteristic working conditions, and the bidirectional water inlet channel is flatNo vortex is generated at the bottom of the face volute, namely below an impeller inlet, the distribution uniformity of the axial speed of the characteristic section of the water inlet channel and the weighted average angle of the speed are correspondingly improved, the distribution uniformity of the axial speed is improved by 3.49% at most and 2.81% at least under the same working condition, and the distribution uniformity of the average axial speed is improved by 3.0% under each working condition; the velocity weighted average angle is improved by 1.14 degrees at the maximum and 0.41 degrees at the minimum. The maximum efficiency point of the pump device is improved by 4 percent.
The utility model discloses in the engineering reality of using according to given proportion to reach furthest's flow state and improve, have important engineering value.
Claims (3)
1. A plane spiral case type bidirectional flow channel water inlet structure with excellent hydraulic performance is characterized in that: the device comprises a horn tube (1), a water guide cone (2), a plane volute (3) and an impeller (4), wherein the inlet of the horn tube (1) is connected and communicated with the inclined plane of the plane volute (3), and the outlet of the horn tube (1) is connected and communicated with the impeller (4); a hub (6) is fixed in the impeller (4), and blades (7) are fixed on the hub (6); the other end of the plane volute (3) is connected and communicated with the water inlet flow channel (5); the bottom of the water guide cone (2) is positioned outside the inlet of the flared tube (1), and the top of the water guide cone (2) extends into the flared tube (1) and is fixedly connected with the hub (6);
the diameter of an inlet of the flared tube (1) is 1.55 times of the diameter of the impeller (4), the diameter of an outlet of the flared tube (1) is equal to the diameter of the impeller (4), the height of the flared tube (1) is 0.53 times of the diameter of the impeller (4), the diameter of a top circle of the water guide cone (2) is 0.3 times of the diameter of the impeller (4), the diameter of a bottom circle of the water guide cone (2) is 1.39 times of the diameter of the impeller (4), the height of the water guide cone (2) is 1.16 times of the diameter of the impeller (4), the height of a section of the plane volute (3) is 0.4 times of the diameter of the impeller (4), and the inclination angle α of a volute inclined plane of the plane volute (3) is.
2. The planar volute type bidirectional flow channel water inlet structure with excellent hydraulic performance as claimed in claim 1, wherein: the generatrix of the water guide cone (2) adopts a quarter of elliptical arc line.
3. The planar volute type bidirectional flow channel water inlet structure with excellent hydraulic performance as claimed in claim 1, wherein: the number of the blades (7) is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921063408.8U CN210290158U (en) | 2019-07-09 | 2019-07-09 | Plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921063408.8U CN210290158U (en) | 2019-07-09 | 2019-07-09 | Plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance |
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| CN210290158U true CN210290158U (en) | 2020-04-10 |
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| CN201921063408.8U Active CN210290158U (en) | 2019-07-09 | 2019-07-09 | Plane volute type bidirectional flow channel water inlet structure with excellent hydraulic performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837953A (en) * | 2022-04-13 | 2022-08-02 | 西华大学 | Non-axial water inlet axial flow pump |
| CN116538102A (en) * | 2023-06-06 | 2023-08-04 | 江苏大学流体机械温岭研究院 | Anti-blocking high-flow vertical pipeline pump |
-
2019
- 2019-07-09 CN CN201921063408.8U patent/CN210290158U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837953A (en) * | 2022-04-13 | 2022-08-02 | 西华大学 | Non-axial water inlet axial flow pump |
| CN116538102A (en) * | 2023-06-06 | 2023-08-04 | 江苏大学流体机械温岭研究院 | Anti-blocking high-flow vertical pipeline pump |
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