CN107489655B - Pump installation bell-shaped inflow passage with the suitable flowing plate of activity - Google Patents
Pump installation bell-shaped inflow passage with the suitable flowing plate of activity Download PDFInfo
- Publication number
- CN107489655B CN107489655B CN201710903051.9A CN201710903051A CN107489655B CN 107489655 B CN107489655 B CN 107489655B CN 201710903051 A CN201710903051 A CN 201710903051A CN 107489655 B CN107489655 B CN 107489655B
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- flowing plate
- activity
- suitable flowing
- coupling spindle
- water inlet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/548—Specially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of pump installation bell-shaped inflow passages with the suitable flowing plate of activity, belong to hydraulic engineering technical field.Including dividing pier, semicircle rear wall, oviduct and the water guide cone being placed in water inlet flow channel, equipped with the suitable flowing plate of activity and positioning pin, suitable flowing plate can make the change for adapting to asymmetry quantum dot using pressure difference, and the suitable flowing plate of the activity is located at water inlet flow channel rear wall and there are gaps between rear wall；Section and runner plane perpendicular where the suitable flowing plate, the both ends of coupling spindle are individually fixed in bell-shaped inflow passage bottom and loudspeaker pipe outer wall, and suitable flowing plate one end is connected by casing with coupling spindle, and can be rotated around coupling spindle；Positioning pin is two, is respectively placed in suitable flowing plate two sides, and be fixed on bell-shaped inflow passage bottom, and the distance of two positioning pins to coupling spindle is respectively less than the length of suitable flowing plate.The present invention is suitable for bell-shaped inflow passage and box water inlet flow channel, can adapt to various operating conditions, improves pump assembly efficiency, operating cost is few, more energy-efficient.
Description
Technical field
The present invention relates to a kind of pump installation bell-shaped inflow passages with the suitable flowing plate of activity, belong to hydraulic engineering technology neck
Domain.
Background technique
Bell-shaped inflow passage is a kind of relatively good water inlet flow channel form, is widely used in vertical axial-flow pump installation.
The horizontal contraction of water flow movement experience of bell-shaped inflow passage, suction chamber to oviduct adjust, that is, accelerate and turn to, in water inlet flow channel
Outlet Section flow velocity is relatively uniform.But compared with elbow inlet passage, the Outlet Section uniformity of bell-shaped inflow passage wants poor
It is some.
For Large Scale Axial-flow Pump Unit, middle dividing pier is equipped in water inlet flow channel.Experimental study shows water inlet flow channel interval
The water flow of pier two sides is not symmetric.Flow rate of water flow in water pump direction of rotation side downstream identical with direction of flow wants low
In the mean flow rate of section, and the flow rate of water flow in the water pump direction of rotation against the current side opposite with direction of flow is higher than section
Mean flow rate.Which results in its Outlet Section velocity flow profile uniformitys to be declined.
And the flow in large pumping station water inlet flow channel at left and right sides of dividing pier usually differs in practical projects, water flow confluence
Not at runner center, become a mandarin so asymmetry should be fully taken into account in the process of optimization of bell-shaped inflow passage to runner stream
The influence of state, if design is improper will sharply to deteriorate pump installation performance.
The partition that a guide functions are usually set up in the middle part of the rear wall of water inlet flow channel improves fluidised form, partition direction one
As it is consistent with runner center line, this scheme only disappears whirlpool significant effect in the case where symmetrically becoming a mandarin, but be fixedly installed every
Plate can not achieve the dynamic equilibrium that water-flow equation is realized under different operating conditions.
Summary of the invention
The purpose of the present invention is in view of the above shortcomings of the prior art, provide a kind of pump installation clock with the suitable flowing plate of activity
Type water inlet flow channel.Suitable flowing plate can make adaptive change to the non-uniform flow of water flow under the effect of the water flow pressure difference of two sides,
Automatic adjusting position keeps the distribution of water inlet flow channel exit velocity more uniform, can preferably play the whirlpool that disappears, water conservancy diversion to water flow confluence
Effect, it is ensured that pumping plant performance and stable operation of unit.
The purpose of the present invention is what is be achieved through the following technical solutions: the pump installation bell feed water flow with the suitable flowing plate of activity
Road, including water pump and the dividing pier and water guide cone that are placed in water inlet flow channel, water pump is equipped with water pump vane, oviduct, oviduct
It is placed in water inlet flow channel, the water inlet flow channel is bell-shaped inflow passage, and the rear wall of water inlet flow channel is semicircle rear wall；The water guide
Cone be set on the water inlet flow channel bottom plate of oviduct lower part, dividing pier be set between water guide cone and the water inlet of water inlet flow channel into
On water flow passage bottom plate；It is characterized in that being equipped with the suitable flowing plate of activity and positioning pin, which fits flowing plate and is located at water inlet flow channel rear wall
And there are gaps between rear wall；The suitable flowing plate of activity is made of rotatable suitable flowing plate, the coupling spindle of fixation and casing, is joined
The both ends of spindle are individually fixed in bell-shaped inflow passage bottom and loudspeaker pipe outer wall；Section and runner bottom surface where the suitable flowing plate
Vertically, it fits flowing plate one end to be connected by casing with coupling spindle, and can be rotated around coupling spindle；The positioning pin is two, is respectively
Positioning pin I, positioning pin II, two positioning pins are respectively placed in suitable flowing plate two sides, and are fixed on bell-shaped inflow passage bottom, two positioning pins
The length of suitable flowing plate is respectively less than to the distance of coupling spindle.
Further, there are the gap of 5mm between the suitable flowing plate and rear wall, the horizontal section center line for fitting flowing plate is initial
Position is consistent with water inlet flow channel center line, and coupling spindle and casing direction are consistent with the pump shaft direction of water pump.
Further, plane (cross section) shape of the suitable flowing plate is made of rectangle, the semi-circular of rectangle both ends.
Further, the length L of the suitable flowing plategIt is 0.6D, thickness b1It is 0.1D, heighth 1It is 0.35D,DFor water pump
Impeller diameter.
Further, the coupling spindle is cylindrical body, and coupling spindle is away from water pump vane center 0.825D, the height of coupling spindleh 3
It is 0.41D, couple shaft diameter d1It is 0.06D,DFor water pump vane diameter.
Further, the height of described sleeve pipe is 0.35D, casing diameterd 2It is 0.067D,DFor water pump vane diameter.
Further, using coupling spindle axle center as the center of circle, horizontal section center line when suitable flowing plate is placed at positioning pin I is boundary
Line, the deflection angle of positioning pin I are -10 °, and the deflection angle of positioning pin II is 40 °, are limited with positioning pin and fit flowing plate rotation direction to be inverse
Hour hands, for slewing area at 0 ° -30 °, automatic adjusting position preferably plays the role of the whirlpool water conservancy diversion that disappears to water flow confluence.
Further, the positioning pin diameter 0.05D, height 0.2D, axle center 0.45 of the positioning pin apart from coupling spindleD, D
For water pump vane diameter.
Further, the suitable flowing plate is made of aluminium alloy or glass-reinforced plastic material, and the coupling spindle and casing are all made of
Stainless steel material production, the positioning pin make of ordinary steel.
The present invention adapts to asymmetric velocity flow profile by changing the suitable flowing plate position of bell-shaped suction box rear wall, can be with
The velocity flow profile for improving runner exit, makes water flow realize the dynamic equilibrium of water-flow equation under different operating conditions, so as to improve
The runnability of water inlet flow channel hydraulic characteristic(s) and pumping plant.
The present invention is suitable for bell-shaped inflow passage and box water inlet flow channel, can adapt to various operating conditions, makes feed water flow
Outlet velocity flow profile in road is more uniform, reduces hydraulic loss, improves pump assembly efficiency, operating cost is few, more energy-efficient.
Detailed description of the invention
Fig. 1 is elevation of the invention；
Fig. 2 is the portion A enlarged drawing in Fig. 1；
Fig. 3 is plan view of the invention；
Fig. 4 is the portion B enlarged drawing in Fig. 3；
Fig. 5 is side view of the invention；
Fig. 6 is three-dimensional line block diagram of the invention；
In figure: 1 water inlet flow channel, 2 rear walls, 3 dividing piers, 4 oviducts, 5 water guide cones, 6 suitable flowing plates, 7 casings, 8 coupling spindles, 9 are determined
Position pin I, 10 positioning pins II.
Specific embodiment
The present invention is suitable for bell-shaped inflow passage and box water inlet flow channel, requires design drawing according to the design.
Pump installation bell-shaped inflow passage with the suitable flowing plate of activity, including the dividing pier 3, semicircle being placed in water inlet flow channel 1
Rear wall 2, oviduct 4 and water guide cone 5, activity suitable flowing plate, positioning pin, the suitable flowing plate of the activity be located at water inlet flow channel rear wall 2 and with
There are the gaps of 5mm between rear wall 2.
The suitable flowing plate of activity is made of rotatable suitable flowing plate 6, fixed coupling spindle 8, casing 7, fit 6 place section of flowing plate with
1 plane perpendicular of water inlet flow channel, the horizontal section center line initial position for fitting flowing plate 6 is consistent with 1 center line of water inlet flow channel, coupling spindle
8 and 7 direction of casing it is consistent with pump shaft direction.
The mid-plane shape of suitable flowing plate 6 is rectangle, and fitting 6 rear and front end flat shape of flowing plate is semicircle；The top of suitable flowing plate
Minister's degree LgIt is 0.6D, thickness b1It is 0.1D, height hgIt is 0.35D, rear wall is semicircle.
Coupling spindle 8 is cylindrical body, and the both ends of coupling spindle 8 are fixed on bell-shaped inflow passage bottom and loudspeaker pipe outer wall, is coupled
Axis 8 is away from impeller center 0.825D；The height of coupling spindle 8 is 0.41D, with the hanging high h of oviduct horn mouthcIt is equal, shaft diameterd 1For
0.05D；The height of casing 7 is 0.35D, 7 diameter d of casing2It is 0.067D,DFor impeller diameter.
The suitable flowing plate of activity can follow incoming flow to rotate around coupling spindle automatically, with shop bolt limit its slewing area 0 °-
30 °, automatic adjusting position preferably plays the role of the whirlpool water conservancy diversion that disappears to water flow confluence.
Shop bolt is fixed on the bottom of water inlet flow channel 1, diameter 0.05D, height 0.2D.Its position are as follows: with coupling spindle
8 axle center radius 0.45DPlace, the section center of circle radius rotation angle of positioning pin II 10 are 40 °, the section center of circle half of positioning pin I 9
Diameter rotation angle is -10 °, it is ensured that suitable flowing plate rotates within the scope of 0 ° -30 °.
Suitable flowing plate 6 is made of aluminium alloy or glass-reinforced plastic material, and coupling spindle and casing are all made of stainless steel material production, fixed
Position pin makes of ordinary steel.
Water inlet flow channel 1 is designed according to relevant criterion, widthBRecommendation takes 2.8D。
Suitable flowing plate 6, coupling spindle 8 and positioning pin (nail) be installed according to the processing of related standard, the rigidity of coupling spindle 8 should ensure that pair
The support of suitable flowing plate, the pre-buried positioning pin (nail) on bottom plate.
Cross section perpendicular where suitable 6 place section of flowing plate and 1 bottom of water inlet flow channel, after the suitable flowing plate of activity is located at water inlet flow channel 1
There are the gaps of 5mm at wall 2 and between rear wall 2, it is ensured that suitable flowing plate rotates freely.
Before installation, first suitable flowing plate 6 is connect with the casing 7 of coupling spindle 8, surface guarantee is smooth, with turning for the suitable flowing plate 6 of benefit
It is dynamic.
The built-in metal component flange in 1 bottom plate of oviduct 4 and water inlet flow channel, 8 upper end of coupling spindle are fixed on outside oviduct 4
Wall, 8 lower end of coupling spindle are fixed on 1 bottom of water inlet flow channel.Fixed form is that flange bolt is connected or welded.
Claims (9)
1. a kind of pump installation bell-shaped inflow passage with the suitable flowing plate of activity, including water pump and is placed in water inlet flow channel (1)
Dividing pier (3) and water guide cone (5), water pump are equipped with water pump vane, oviduct (4), and oviduct (4) is placed in water inlet flow channel (1), institute
Stating water inlet flow channel (1) is bell-shaped inflow passage, and the rear wall of water inlet flow channel (1) is semicircle rear wall (2)；The water guide cone (5) sets
Be placed on water inlet flow channel (1) bottom plate of oviduct (4) lower part, dividing pier (3) be set to water guide cone (5) and water inlet flow channel (1) into
On water inlet flow channel (1) bottom plate between the mouth of a river；It is characterized in that being equipped with, flowing plate is fitted in activity and flowing plate position is fitted in positioning pin, the activity
There are gaps at the semicircle rear wall (2) of water inlet flow channel (1) and between semicircle rear wall (2)；The suitable flowing plate of activity by
Rotatable suitable flowing plate (6), casing (7) and fixed coupling spindle (8) composition, the both ends of coupling spindle (8) are individually fixed in into water
The bottom of runner (1) and oviduct (4) outer wall；Section and water inlet flow channel (1) plane perpendicular where the suitable flowing plate (6), fit stream
Plate (6) one end and casing (7) are fixed, and are connected by casing (7) with coupling spindle (8), and can rotate around coupling spindle (8)；It is described
Positioning pin is two, is positioning pin I (9), positioning pin II (10) respectively, and two positioning pins are respectively placed in suitable flowing plate (6) two sides, and solid
Due to water inlet flow channel (1) bottom, the distance of two positioning pins to coupling spindle (8) is respectively less than the length of suitable flowing plate (6).
2. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that the suitable stream
There are the gaps of 5mm between plate (6) and semicircle rear wall (2), fit horizontal section center line initial position and the water inlet of flowing plate (6)
Runner (1) center line is consistent, and coupling spindle (8) and casing (7) direction are consistent with the pump shaft direction of water pump.
3. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that the suitable stream
The flat shape of plate (6) is made of the semicircle of rectangle, rectangle both ends.
4. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that the suitable stream
The length of plate (6)L gIt is 0.6D, thicknessb 1It is 0.1D, heighth 1It is 0.35D,DFor water pump vane diameter.
5. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that the connection
Axis (8) is cylindrical body, and coupling spindle (8) is away from water pump vane center 0.825D, the height h of coupling spindle (8)3It is 0.41D, coupling spindle
(8) diameter d1For 0.06D,DFor water pump vane diameter.
6. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that described sleeve pipe
(7) height is 0.35D, casing diameterd 2It is 0.067D,DFor water pump vane diameter.
7. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that with coupling spindle
(8) axle center is the center of circle, and horizontal section center line when suitable flowing plate (6) are placed at positioning pin I (9) is boundary line, positioning pin I (9)
Deflection angle is -10 °, and the deflection angle of positioning pin II (10) is 40 °, limits suitable flowing plate slewing area at 0 ° -30 ° with positioning pin.
8. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that the positioning
Sell diameter 0.05D, height 0.2 D, axle center 0.45 of the positioning pin apart from coupling spindleD, DFor water pump vane diameter.
9. the pump installation bell-shaped inflow passage according to claim 1 with the suitable flowing plate of activity, characterized in that the suitable stream
Plate (6) is made of aluminium alloy or glass-reinforced plastic material, and the coupling spindle (8) and casing (7) are all made of stainless steel material production, institute
Positioning pin is stated to make of ordinary steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710903051.9A CN107489655B (en) | 2017-09-29 | 2017-09-29 | Pump installation bell-shaped inflow passage with the suitable flowing plate of activity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710903051.9A CN107489655B (en) | 2017-09-29 | 2017-09-29 | Pump installation bell-shaped inflow passage with the suitable flowing plate of activity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107489655A CN107489655A (en) | 2017-12-19 |
| CN107489655B true CN107489655B (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710903051.9A Active CN107489655B (en) | 2017-09-29 | 2017-09-29 | Pump installation bell-shaped inflow passage with the suitable flowing plate of activity |
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| CN (1) | CN107489655B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235546A (en) * | 2018-11-28 | 2019-01-18 | 扬州大学 | Forebay of Pumping Station adjustable plate-type column |
| CN113309730A (en) * | 2021-06-24 | 2021-08-27 | 襄阳五二五泵业有限公司 | Vertical pipeline pump with uniformly distributed inlet flow field speed |
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|---|---|---|---|---|
| JPH07286598A (en) * | 1994-04-15 | 1995-10-31 | Mitsubishi Heavy Ind Ltd | Centrifugal fan provided with fluid deflector |
| CN201090513Y (en) * | 2007-09-29 | 2008-07-23 | 上海凯士比泵有限公司 | Stream intake path without swirl of water pump |
| CN201581663U (en) * | 2009-12-30 | 2010-09-15 | 扬州大学 | Novel combined type vortex eliminating and preventing pump station intake sump |
| CN103790838A (en) * | 2014-02-13 | 2014-05-14 | 扬州大学 | Two-way low lift water pumping device shaped like Omega in Greek letters |
| CN104373387A (en) * | 2014-10-27 | 2015-02-25 | 扬州大学 | Bell inlet passage excellent in hydraulic performance and application method thereof |
| CN104818699A (en) * | 2015-04-01 | 2015-08-05 | 扬州大学 | 1/4 elliptic cone conical table eddy eliminating device and method for closed intake pool |
| CN105275885A (en) * | 2015-10-14 | 2016-01-27 | 江苏国泉泵业制造有限公司 | Design method for bell-shaped water inlet flow way |
| CN206360895U (en) * | 2016-09-29 | 2017-07-28 | 扬州大学 | A kind of Contiuum type model test pump installation |
-
2017
- 2017-09-29 CN CN201710903051.9A patent/CN107489655B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07286598A (en) * | 1994-04-15 | 1995-10-31 | Mitsubishi Heavy Ind Ltd | Centrifugal fan provided with fluid deflector |
| CN201090513Y (en) * | 2007-09-29 | 2008-07-23 | 上海凯士比泵有限公司 | Stream intake path without swirl of water pump |
| CN201581663U (en) * | 2009-12-30 | 2010-09-15 | 扬州大学 | Novel combined type vortex eliminating and preventing pump station intake sump |
| CN103790838A (en) * | 2014-02-13 | 2014-05-14 | 扬州大学 | Two-way low lift water pumping device shaped like Omega in Greek letters |
| CN104373387A (en) * | 2014-10-27 | 2015-02-25 | 扬州大学 | Bell inlet passage excellent in hydraulic performance and application method thereof |
| CN104818699A (en) * | 2015-04-01 | 2015-08-05 | 扬州大学 | 1/4 elliptic cone conical table eddy eliminating device and method for closed intake pool |
| CN105275885A (en) * | 2015-10-14 | 2016-01-27 | 江苏国泉泵业制造有限公司 | Design method for bell-shaped water inlet flow way |
| CN206360895U (en) * | 2016-09-29 | 2017-07-28 | 扬州大学 | A kind of Contiuum type model test pump installation |
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| CN107489655A (en) | 2017-12-19 |
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