CN104294883B - A kind of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence and application process thereof - Google Patents

A kind of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence and application process thereof Download PDF

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Publication number
CN104294883B
CN104294883B CN201410523511.1A CN201410523511A CN104294883B CN 104294883 B CN104294883 B CN 104294883B CN 201410523511 A CN201410523511 A CN 201410523511A CN 104294883 B CN104294883 B CN 104294883B
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vertical shaft
round platform
runner
water inlet
flow
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CN104294883A (en
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陆林广
徐磊
陆伟刚
王海
李亚楠
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Yangzhou University
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Yangzhou University
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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00Use of pumping plants or installations; Layouts thereof
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B9/00Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/02Water-ways
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00Use of pumping plants or installations; Layouts thereof
    • E03B5/04Use of pumping plants or installations; Layouts thereof arranged in wells
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Abstract

The preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence and an application process thereof, belong to hydraulic engineering pumping plant technical field.Described preposition vertical shaft type through-flow pump water inlet flow channel is divided into straight entry section, vertical shaft overcurrent section along water (flow) direction, passes through the section of confluxing and round platform rectification section etc. 4 sections mutually, and each section has different geometric properties; Described vertical shaft overcurrent section, to pass through the section of confluxing and round platform rectification section geometrical body mutually complicated, provides detailed cross section place figure and profile data table; The all sizes of described preposition vertical shaft type through-flow pump water inlet flow channel all represent by relative value, these relative values are multiplied by pumping plant intend the through-flow pump impeller diameter adopted the actual required size of this pumping plant water inlet flow channel; The parameter of described straight entry section can adjust within the specific limits according to the actual demand of pumping plant, to adapt to the actual demand of different pumping plant to the main geometric parameters such as flow channel length, width.For guarantee the safe, stable of pumping plant and Effec-tive Function significant.

Description

A kind of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence and application process thereof
Technical field
The invention belongs to hydraulic engineering pumping plant technical field, be specifically related to a kind of preposition vertical shaft type through-flow pump water inlet flow channel and application process thereof of hydraulic performance excellence, be mainly used in instructing engineers and technicians to design the preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence, to ensure its designing quality.
Background technique
Preposition Shaft-Well Tubular Pump Unit has the advantage that current are smooth-going, runner hydraulic loss is little, is applicable to the large pumping station of special low lift (lower than 3m), to solve the problem that low-lift pump unit efficiency is difficult to improve.The pump-unit of this pattern arranges the vertical shaft of building with reinforced concrete in water inlet flow channel, the equipment such as power engine, bearing and gear-box are arranged in vertical shaft, compared with the low-lift pump device of other pattern, have that structure is comparatively simple, installation and repairing is more convenient, invest the advantages such as less.To the designing requirement of preposition vertical shaft type through-flow pump water inlet flow channel be: (1) provides enough large shaft space size, so that the installation of the equipment such as power engine, gear-box and maintenance; (2) guide current smoothly to flow to through-flow pump blade wheel chamber from forebay, for its import provides uniform flow field, guarantee to realize pumping plant safety, stable and Effec-tive Function.Preposition vertical shaft type through-flow pump water inlet flow channel three-dimensional body is complicated, the requirement of enough large and smooth-going even two aspects of runner flow field of bulk in vertical shaft must be met simultaneously, the usual Optimum Hydraulic Design method based on CFD that need adopt complexity, design difficulty is large, the design cycle is long.
Summary of the invention
Object of the present invention is exactly for above-mentioned situation, provide a kind of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence and be convenient to the method for application, in order to ensure that designed water inlet flow channel meets the requirement of enough large and smooth-going even two aspects of runner flow field of bulk in vertical shaft, guarantee pumping plant safety, stablize and Effec-tive Function.
First object of the present invention is achieved through the following technical solutions, a kind of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence, it is characterized in that, described preposition vertical shaft type through-flow pump water inlet flow channel is provided with straight entry section, vertical shaft overcurrent section along water (flow) direction, passes through the section of confluxing and round platform rectification section mutually, straight entry section, vertical shaft overcurrent section, pass through mutually the section of confluxing and round platform rectification section length, highly, width and the cambered surface related to, sweep be all associated with through-flow pump impeller diameter D (unit is m, lower with); Described straight entry section is positioned at described preposition vertical shaft type through-flow pump water inlet flow channel foremost, straight entry section flow channels is made up of runner inner wall, and the upper and lower sideline of runner and plane shape line are straight line, and section configuration is rectangle, guide that current are smooth-going enters water inlet flow channel, the length L of straight entry section zfor 0.8D, height H z1for 1.576D, width B z1for 2.545D, import top board radius of arc R=0.3077D-0.0154m; After described vertical shaft overcurrent section is positioned at straight entry section, vertical shaft overcurrent section flow channels is made up of runner inner wall and vertical shaft outer wall, the section configuration of runner becomes round along water (flow) direction gradually by side, vertical shaft outer wall shape adopts Olive Shape change curved surface along water (flow) direction, current are guided smoothly to be passed through by the flow channels of vertical shaft both sides, vertical shaft overcurrent segment length L jfor 3.586D, entrance width BL j1and height H j1be respectively 2.545D and 1.576D; Describedly pass through after the section of confluxing is positioned at vertical shaft overcurrent section mutually, pass through the section of confluxing flow channels mutually and be made up of the inwall of runner and the outer wall of vertical shaft and round platform, guide two strands of current flowing out from vertical shaft both sides to favourable exchange conjunction without impact Horizon, pass through the length L of the section of confluxing mutually gfor 1.027D, entrance width BL g1and height H g1be respectively 2.212D and 1.576D, shaft width BJ g1for 1.08D, round platform diameter DY g1for 1.08D; After described round platform rectification section is positioned at and passes through the section of confluxing mutually, round platform rectification section flow channels is made up of runner inner wall and round platform outer wall, the shape of generatrix of runner inner wall and round platform outer wall is curve, round platform rectification section carries out last smooth-going stable adjustment and acceleration to the current flowing to through-flow pump blade wheel chamber, current are made to enter through-flow pump blade wheel chamber very equably, the length L of round platform rectification section tfor 0.658D, tunnel inlets diameter DL t1with round platform inlet diameter DY t1be respectively 1.316D and 0.453D, runner exit diameter DL t2with round platform outlet diameter DY t2be respectively 0.973D and 0.367D; Straight entry section, vertical shaft overcurrent section, pass through the section of confluxing and round platform rectification section is connected smoothly successively mutually.
Second object of the present invention is achieved through the following technical solutions, and a kind of easy application process of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence, is characterized in that, comprise the following steps:
(1) preposition vertical shaft type through-flow pump water inlet flow channel is divided into straight entry section, vertical shaft overcurrent section successively along water (flow) direction, passes through the section of confluxing and round platform rectification section 4 sections mutually, the relative value that all to adopt with through-flow pump impeller diameter D by the construction geometry characteristic parameter of each section be reference value represents; Described straight entry section is positioned at described preposition vertical shaft type through-flow pump water inlet flow channel foremost, the length L of straight entry section zfor 0.8D, height H z1for 1.576D, width B z1for 2.545D, import top board radius of arc R=0.3077D-0.0154m, straight entry section flow channels is made up of runner inner wall, the upper and lower sideline of runner and plane shape line are straight line, and section configuration is rectangle, and straight entry section adapts to pump house arrangement needs and guides current to enter water inlet flow channel; After described vertical shaft overcurrent section is positioned at straight entry section, the length L of vertical shaft overcurrent section jfor 3.586D, entrance width BL j1and height H j1be respectively 2.545D and 1.576D, vertical shaft overcurrent section flow channels is made up of runner inner wall and vertical shaft outer wall, the section configuration of runner becomes round along water (flow) direction gradually by side, the height of vertical shaft outer wall is constant, width adopts Olive Shape change curve, vertical shaft overcurrent section three-dimensional body adopts detailed cross section place figure and data sheet to represent, profile data comprises runner longitudinal section upper sideline coordinate (X j1i, Y j1i), lower sideline coordinate (X j2i, Y j2i), runner height H ji, width B L ji, transitional radius R jiwith shaft width BJ ji, vertical shaft overcurrent section guides current smoothly to be passed through by the both sides of this section of vertical shaft; Describedly pass through after the section of confluxing is positioned at vertical shaft overcurrent section mutually, pass through the length L of the section of confluxing mutually gfor 1.027D, entrance width BL g1and height H g1be respectively 2.212D and 1.576D, shaft width BJ g1for 1.08D, round platform diameter DY g1for 1.08D, passing through the section of confluxing mutually is that vertical shaft passes through in this section mutually with round platform, flow channels is made up of the inwall of runner and the outer wall of vertical shaft or round platform, and pass through the section of confluxing three-dimensional body mutually and adopt detailed cross section place figure and data sheet to represent, profile data comprises runner longitudinal section upper sideline coordinate (X g1i, Y g1i), lower sideline coordinate (X g2i, Y g2i), runner height H gi, width B L gi, transitional radius R gi, shaft width BJ giwith round platform diameter DY gi, passing through the section of confluxing mutually is that the two strands of current making to flow out from vertical shaft both sides to be favourable exchanged conjunction without impact Horizon; After described round platform rectification section is positioned at and passes through the section of confluxing mutually, the length L of round platform rectification section tfor 0.658D, tunnel inlets diameter DL t1with round platform inlet diameter DY t1be respectively 1.316D and 0.453D, runner exit diameter DL t2with round platform outlet diameter DY t2be respectively 0.973D and 0.367D, round platform rectification section flow channels is made up of runner inner wall and round platform outer wall, the shape of generatrix of runner inner wall and round platform outer wall is curve, round platform rectification section three-dimensional body adopts detailed cross section place figure and data sheet to represent, profile data comprises runner longitudinal section upper sideline coordinate (X t1i, Y t1i), lower sideline coordinate (X t2i, Y t2i), Flow diameter DL tiwith round platform diameter DY ti, round platform rectification section does last adjustment and acceleration to the current flowing to through-flow pump blade wheel chamber, to ensure that current enter through-flow pump blade wheel chamber very equably;
(2) the straight entry section utilizing step (1) to determine, vertical shaft overcurrent section, pass through the section of confluxing and round platform rectification section construction geometry characteristic parameter mutually, the Size calculation intending the through-flow pump impeller diameter D adopted according to pumping plant goes out the size needed for preposition vertical shaft type through-flow pump water inlet flow channel;
(3) the length L of the straight entry section determined according to step (1) zfor 0.8D, can carry out on this basis lengthening or shortening L according to the needs of pump house arrangement zadjustment;
(4) width B of the straight entry section determined according to step (1) z1for 2.545D, the needs according to pump house arrangement can carry out strengthening or reducing B on this basis z1adjustment, the runner plane shape line of described vertical shaft overcurrent section is adjusted accordingly simultaneously;
(5) step (3), (4) adjustment to preposition vertical shaft type through-flow pump water inlet flow channel straight entry section geometric parameter do not change the geometric parameter passing through the section of confluxing and round platform rectification section mutually that step (1) is determined;
(6) according to each geometric parameter of preposition vertical shaft type through-flow pump water inlet flow channel converted and after adjustment, the preposition vertical shaft type through-flow pump water inlet flow channel single line drawing needed for drafting.
Compared with prior art, the present invention has following beneficial effect in the present invention:
The first, preposition vertical shaft type through-flow pump water inlet flow channel hydraulic performance of the present invention is excellent, and using method is easy, without the need to carrying out the complicated Optimum Hydraulic Design research work based on CFD; The quality of every pumping plant preposition vertical shaft type through-flow pump water inlet flow channel design can be ensured, for guarantee the safe, stable of large-scale vertical shaft type tubular pump station and Effec-tive Function significant.
The second, preposition vertical shaft type through-flow pump water inlet flow channel provided by the invention is divided into straight entry section, vertical shaft overcurrent section along water (flow) direction, passes through the section of confluxing and round platform rectification section 4 sections mutually, and each section has different geometric properties and effect; Straight entry section does preliminary adjustment to Forebay of Pumping Station incoming flow, vertical shaft overcurrent section guides uniform fluid flow ground to be passed through by vertical shaft both sides, pass through two strands of current that the section of confluxing makes to flow out from vertical shaft both sides mutually to favourable exchange conjunctions without impact Horizon, round platform rectification section finally current are adjusted to very uniform state enter through-flow pump blade wheel chamber; The preposition vertical shaft type through-flow pump water inlet flow channel flow-shape that application the present invention obtains is smooth-going evenly, streamline is well arranged, and hydraulic performance is excellent.
3rd, according to the statistics to built large-scale vertical shaft type tubular pump station, the relative value (with through-flow pump impeller diameter D for reference value) of the length of preposition vertical shaft type through-flow pump water inlet flow channel, width and height relatively; The all geometric parameters of runner all represent by relative value, for large-scale vertical shaft type tubular pump station, these relative values are multiplied by through-flow pump impeller diameter D and can obtain required channel size; The length of runner and width can adjust within the specific limits easily according to the actual demand of different pumping plant.
4th, preposition vertical shaft type through-flow pump water inlet flow channel hydraulic performance provided by the invention is excellent: 1. according in recent years to the investigation and application achievement of large-scale preposition vertical shaft type through-flow pump water inlet flow channel, selects wherein through abundant Optimum Hydraulic Design and strict testing property and the preposition vertical shaft type through-flow pump water inlet flow channel of application of succeeding; 2. the main hydraulic performance index of described preposition vertical shaft type through-flow pump water inlet flow channel is as follows: runner exit water velocity distribution consistency degree V u>=98.5%; Runner exit current enter the average angle of through-flow pump blade wheel chamber the runner hydraulic loss Δ h≤0.08m of design discharge.
Accompanying drawing explanation
Fig. 1 a is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel indulges cross-sectional schematic;
Fig. 1 b is the horizontal cross-sectional schematic of the present invention's preposition vertical shaft type through-flow pump water inlet flow channel;
Fig. 1 c is the A in Fig. 1 a and Fig. 1 b ji-A jisection cross-sectional schematic;
Fig. 1 d is the A in Fig. 1 a and Fig. 1 b gi-A gisection cross-sectional schematic;
Fig. 1 e is the A in Fig. 1 a and Fig. 1 b ti-A tisection cross-sectional schematic;
Fig. 2 a is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel vertical shaft overcurrent section cross section place indulges cross-sectional schematic;
Fig. 2 b is the horizontal cross-sectional schematic of the present invention's preposition vertical shaft type through-flow pump water inlet flow channel vertical shaft overcurrent section cross section place;
Fig. 3 a is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel passes through the section of confluxing cross section place mutually and indulges cross-sectional schematic;
Fig. 3 b is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel passes through the horizontal cross-sectional schematic of the section of confluxing cross section place mutually;
Fig. 4 is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel round platform rectification section cross section place indulges cross-sectional schematic;
Fig. 5 a is the vertical cross-sectional schematic of the present invention's preposition vertical shaft type through-flow pump water inlet flow channel straight entry segment length adjustment;
Fig. 5 b is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel straight entry segment length adjusts horizontal cross-sectional schematic;
Fig. 6 a is that the present invention's preposition vertical shaft type through-flow pump water inlet flow channel straight entry section width adjustment indulges cross-sectional schematic;
Fig. 6 b is the horizontal cross-sectional schematic of the present invention's preposition vertical shaft type through-flow pump water inlet flow channel straight entry section width adjustment;
In figure: 1 runner, 2 vertical shafts, 3 round platforms, 4 straight entry sections, 5 vertical shaft overcurrent sections, 6 pass through the section of confluxing mutually, 7 round platform rectification sections, 8 longitudinal section upper sidelines, 9 longitudinal section lower sidelines.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
(1) object of the present invention: 1. the preposition vertical shaft type through-flow pump water inlet flow channel that a kind of applicability is strong is provided, this runner, through strict test, proves that its hydraulic performance is excellent, and to succeed application at large pumping station; 2. the preposition vertical shaft type through-flow pump water inlet flow channel flow channels provided is made up of the inwall of runner 1 and the outer wall of vertical shaft 2 and round platform 3, as shown in Figure 1 a, 1 b; Vertical shaft 2 passes through mutually with round platform 3, and both are positioned at the inside of runner 1, and flow channels section is made up of inner ring and outer ring, and inner ring is the outer wall of vertical shaft 2 or round platform 3, and outer ring is the inwall of runner 1, as shown in Fig. 1 c, Fig. 1 d, Fig. 1 e; 3. described preposition vertical shaft type through-flow pump water inlet flow channel is divided into straight entry section 4, vertical shaft overcurrent section 5 along water (flow) direction, passes through the section of confluxing 6 and round platform rectification section 7 mutually, and each section has different geometric properties and effect, as shown in Figure 1 a, 1 b; 4. the geometric parameter of described preposition vertical shaft type through-flow pump water inlet flow channel all represents (with through-flow pump impeller diameter D for reference value, lower same) with relative value; 5. described vertical shaft overcurrent section 5, to pass through the section of confluxing 6 and round platform rectification section 7 geometrical body mutually complicated, provides detailed cross section place and profile data; 6. each geometric parameter relative value is multiplied by pumping plant intend the through-flow pump impeller diameter D adopted the size of water inlet flow channel needed for this pumping plant and vertical shaft; 7. the length of described preposition vertical shaft type through-flow pump water inlet flow channel and width can adjust within the specific limits according to the actual demand of different pumping plant.
(2) the preposition vertical shaft type through-flow pump water inlet flow channel hydraulic performance provided is excellent;
1. according in recent years to the investigation and application achievement of preposition vertical shaft type through-flow pump water inlet flow channel, select through abundant Optimum Hydraulic Design and strict testing property and the preposition vertical shaft type through-flow pump water inlet flow channel of application of succeeding;
2. the main hydraulic performance index of described preposition vertical shaft type through-flow pump water inlet flow channel is as follows:
Runner exit water velocity distribution consistency degree V u>=98.5%;
Runner exit current enter the average angle of through-flow pump blade wheel chamber
The runner hydraulic loss Δ h≤0.08m of design discharge.
(3) provide the presentation of preposition vertical shaft type through-flow pump water inlet flow channel geometrical body succinctly clear;
The flow channels of 1. provided preposition vertical shaft type through-flow pump water inlet flow channel is made up of the inwall of runner 1 and the outer wall of vertical shaft 2 and round platform 3; Vertical shaft 2 passes through mutually with round platform 3, and both are positioned at the inside of runner 1, and the section of described preposition vertical shaft type through-flow pump water inlet flow channel flow channels is made up of inner ring and outer ring, and outer ring is the inwall of runner 1, and inner ring is the outer wall of vertical shaft 2 or round platform 3;
2. described preposition vertical shaft type through-flow pump water inlet flow channel is divided into straight entry section 4, vertical shaft overcurrent section 5 along water (flow) direction, passes through the section of confluxing 6 and round platform rectification section 7 mutually, and each section has different geometric properties and effect;
3. the physical dimension of described preposition vertical shaft type through-flow pump water inlet flow channel all represents with relative value;
4. described straight entry section 4 is positioned at described preposition vertical shaft type through-flow pump water inlet flow channel foremost, it is characterized in that flow channels is made up of runner inner wall, and this section of upper and lower sideline of runner and plane shape line are straight line, and section configuration is rectangle; Its effect, mainly in order to adapt to the needs of pump house arrangement, also can play the effect guiding current to enter runner simultaneously; The geometric parameter of this section comprises the length L of straight entry section 4 z, width B z1, height H z1with import top board radius of arc R;
5. after described vertical shaft overcurrent section 5 is positioned at straight entry section 4, it is characterized in that flow channels is made up of runner 1 inwall and vertical shaft 2 outer wall, as illustrated in figure 1 c, the section configuration of this section of runner 1 is by Fang Bianyuan, and the height of vertical shaft 2 outer wall is constant, width have employed Olive Shape change curved surface for its section configuration; Its effect guides current smoothly to be passed through by the both sides of this section of vertical shaft 2; For accurately expressing this section of geometrical body, provide this section of detailed cross section place figure and data sheet; Data sheet comprises the coordinate (X of the runner longitudinal section upper sideline 8 of this section of each section j1i, Y j1i), the coordinate (X of lower sideline 9 j2i, Y j2i), runner height H ji, width B L ji, transitional radius R jiwith shaft width BJ jietc. data;
6. describedly pass through after the section of confluxing 6 is positioned at vertical shaft overcurrent section 5 mutually, it is characterized in that vertical shaft 2 passes through in this section mutually with round platform 3, flow channels is made up of the outer wall of runner 1 inwall and vertical shaft 2 or round platform 3, and its section configuration as shown in Figure 1 d; The effect of this section is that the two strands of current making to flow out from vertical shaft both sides to be favourable exchanged conjunction without impact Horizon; This section of geometrical body is complicated and large on the hydraulic performance impact of described preposition vertical shaft type through-flow pump water inlet flow channel, and the Hydraulic Design requires high, for this reason, provides this section of detailed cross section place figure and data sheet; Data sheet comprises the coordinate (X of the runner longitudinal section upper sideline 8 of this section of each section g1i, Y g1i), the coordinate (X of lower sideline 9 g2i, Y g2i), runner height H gi, width B L gi, transitional radius R gi, shaft width BJ giwith round platform diameter DY gietc. data;
7., after described round platform rectification section 7 is positioned at and passes through the section of confluxing 6 mutually, it is characterized in that flow channels is made up of runner 1 inwall and round platform 3 outer wall, the shape of generatrix of its inside and outside wall is curve, and the section configuration of this section as shown in fig. le; The effect of this section does last adjustment and acceleration to the current flowing to through-flow pump blade wheel chamber, and to ensure that current enter through-flow pump blade wheel chamber very equably, this section of the Hydraulic Design is to water velocity distribution consistency degree V uwith enter pump average angle there is decisive influence; Provide this section of detailed cross section place figure and data sheet, data sheet comprises the coordinate (X of the longitudinal section upper sideline 8 of this section of each section t1i, Y t1i), the coordinate (X of lower sideline 9 t2i, Y t2i), Flow diameter DL tiwith round platform diameter DY tietc. data.
(4) the preposition vertical shaft type through-flow pump water inlet flow channel application process provided is easy to utilize;
1. each geometric parameter relative value of described preposition vertical shaft type through-flow pump water inlet flow channel is multiplied by pumping plant intend the through-flow pump impeller diameter D adopted size needed for this pumping plant water inlet flow channel;
2. for obtaining excellent hydraulic performance, ensureing the Hydraulic Design quality of preposition vertical shaft type through-flow pump water inlet flow channel, avoid carrying out complicated Optimum Hydraulic Design research simultaneously, the present invention passes through the section of confluxing 6 and round platform rectification section 7 adopts detailed cross section place figure and data sheet to represent by the vertical shaft overcurrent section 5 of geometrical body complexity, mutually, directly can be converted application, without the need to carrying out complicated Optimum Hydraulic Design research again;
3. the length L of described straight entry section 4 zneeds according to pump house arrangement can lengthen or shorten on the basis of provided parameter;
4. the width B of described straight entry section 4 z1can suitably strengthen according to the needs that pump house plane structure is arranged on the basis of provided parameter or reduce, need to adjust accordingly the runner plane shape line of described vertical shaft overcurrent section simultaneously.
Embodiment 1
(1) the preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence of the present invention is as follows:
Preposition vertical shaft type through-flow pump water inlet flow channel provided by the invention is provided with straight entry section 4, vertical shaft overcurrent section 5 along water (flow) direction, passes through the section of confluxing 6 and round platform rectification section 7 mutually, and described each segment data all adopts relative value to represent; The length L of described straight entry section 4 zfor 0.8D, height H z1for 1.576D, width B z1for 2.545D, import top board radius of arc R=0.3077D-0.0154m; The length L of described vertical shaft overcurrent section 5 jfor 3.586D, entrance width BL j1for 2.545D, height H j1for 1.576D, the coordinate (X of the runner longitudinal section upper sideline 8 of this section of each section j1i, Y j1i), the coordinate (X of lower sideline 9 j2i, Y j2i), runner height H ji, width B L ji, transitional radius R jiwith shaft width BJ jietc. data in table 1, the position of each section as shown in Figure 2; The described length L passing through the section of confluxing 6 mutually gfor 1.027D, entrance width BL g1for 2.212D, height H g1for 1.576D, shaft width BJ g1for 1.08D, round platform diameter DY g1for 1.08D, the coordinate (X of the runner longitudinal section upper sideline 8 of this section of each section g1i, Y g1i), the coordinate (X of lower sideline 9 g2i, Y g2i), runner height H gi, width B L gi, transitional radius R gi, shaft width BJ giwith round platform diameter DY gietc. data in table 2, the position of each section as shown in Figure 3; The length L of described round platform rectification section 7 tfor 0.658D, tunnel inlets diameter DL t1for 1.316D, round platform inlet diameter DY t1for 0.453D, runner exit diameter DL t2for 0.973D, round platform outlet diameter DY t2for 0.367D, the coordinate (X of the runner longitudinal section upper sideline 8 of this section of each section t1i, Y t1i), the coordinate (X of lower sideline 9 t2i, Y t2i), Flow diameter DL tiwith round platform diameter DY tietc. data in table 3, the position of each section as shown in Figure 4; The true origin of table 1, table 2 and table 3 central fore-and-aft vertical plane upper sideline 8 and lower sideline 9 is positioned at the O point of vertical shaft overcurrent section 5 admission section, as shown in Figure 2; In table 1, table 2 and table 3, each data are relative value (with through-flow pump impeller diameter D for reference value).
Table 1 vertical shaft overcurrent section profile data table
Table 2 passes through the section of confluxing profile data table mutually
Table 3 round platform rectification section profile data table
(2) application process of the present invention is as follows:
1. described preposition vertical shaft type through-flow pump water inlet flow channel each section of physical dimension parameter relative value is multiplied by pumping plant intend the through-flow pump impeller diameter D adopted the required size of this pumping plant water inlet flow channel, described vertical shaft overcurrent section 5, the data of passing through the section of confluxing 6 and each section of round platform rectification section 7 mutually can be called in excel table and be converted;
2. the length L of described preposition vertical shaft type through-flow pump water inlet flow channel straight entry section 4 zfor 0.8D, if need lengthen or shorten L z, then can be undertaken by the mode shown in Fig. 5, in figure, L ' zrepresent L zsituation about lengthening, L z" represent L zsituation about shortening;
3. the width B of described preposition vertical shaft type through-flow pump water inlet flow channel straight entry section 4 z1for 2.545D, if need B be changed z1, B z1the corresponding change of width of flow path of described vertical shaft overcurrent section 5 during change, B z1change mode as shown in Figure 6, in figure, B ' z1represent B z1situation about strengthening, B z1" represent B z1situation about reducing;
4. the adjustment of the geometric parameter of described preposition vertical shaft type through-flow pump water inlet flow channel straight entry section 4 does not change vertical shaft overcurrent section 5, passes through the geometric parameter of the section of confluxing 6 and round platform rectification section 7 mutually.
(3) according to each geometric parameter of preposition vertical shaft type through-flow pump water inlet flow channel converted and after adjustment, in AUTO CAD software, required preposition vertical shaft type through-flow pump water inlet flow channel single line drawing is drawn.

Claims (2)

1. the preposition vertical shaft type through-flow pump water inlet flow channel of a hydraulic performance excellence, it is characterized in that, described preposition vertical shaft type through-flow pump water inlet flow channel is provided with straight entry section, vertical shaft overcurrent section along water (flow) direction, passes through the section of confluxing and round platform rectification section mutually, straight entry section, vertical shaft overcurrent section, pass through mutually the section of confluxing and round platform rectification section length, highly, width and relate to cambered surface, sweep etc. and be all associated with through-flow pump impeller diameter D; Described straight entry section is positioned at described preposition vertical shaft type through-flow pump water inlet flow channel foremost, straight entry section flow channels is made up of runner inner wall, and the upper and lower sideline of runner and plane shape line are straight line, and section configuration is rectangle, guide that current are smooth-going enters water inlet flow channel, the length L of straight entry section zfor 0.8D, height H z1for 1.576D, width B z1for 2.545D, import top board radius of arc R=0.3077D-0.0154m; After described vertical shaft overcurrent section is positioned at straight entry section, vertical shaft overcurrent section flow channels is made up of runner inner wall and vertical shaft outer wall, the section configuration of runner becomes round along water (flow) direction gradually by side, vertical shaft outer wall shape adopts Olive Shape change curved surface along water (flow) direction, current are guided smoothly to be passed through by the flow channels of vertical shaft both sides, the length L of vertical shaft overcurrent section jfor 3.586D, entrance width BL j1and height H j1be respectively 2.545D and 1.576D; Describedly pass through after the section of confluxing is positioned at vertical shaft overcurrent section mutually, pass through the section of confluxing flow channels mutually and be made up of the inwall of runner and the outer wall of vertical shaft and round platform, guide two strands of current flowing out from vertical shaft both sides to favourable exchange conjunction without impact Horizon, pass through the length L of the section of confluxing mutually gfor 1.027D, entrance width BL g1and height H g1be respectively 2.212D and 1.576D, shaft width BJ g1for 1.08D, round platform diameter DY g1for 1.08D; After described round platform rectification section is positioned at and passes through the section of confluxing mutually, round platform rectification section flow channels is made up of runner inner wall and round platform outer wall, the shape of generatrix of runner inner wall and round platform outer wall is curve, round platform rectification section carries out last smooth-going stable adjustment and acceleration to the current flowing to through-flow pump blade wheel chamber, current are made to enter through-flow pump blade wheel chamber very equably, the length L of round platform rectification section tfor 0.658D, tunnel inlets diameter DL t1with round platform inlet diameter DY t1be respectively 1.316D and 0.453D, runner exit diameter DL t2with round platform outlet diameter DY t2be respectively 0.973D and 0.367D; Straight entry section, vertical shaft overcurrent section, pass through the section of confluxing and round platform rectification section is connected smoothly successively mutually.
2. an application process for the preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence, is characterized in that, comprise the following steps:
(1) preposition vertical shaft type through-flow pump water inlet flow channel is divided into straight entry section, vertical shaft overcurrent section successively along water (flow) direction, passes through the section of confluxing and round platform rectification section 4 sections mutually, the relative value that all to adopt with through-flow pump impeller diameter D by the construction geometry characteristic parameter of each section be reference value represents; Described straight entry section is positioned at described preposition vertical shaft type through-flow pump water inlet flow channel foremost, the length L of straight entry section zfor 0.8D, height H z1for 1.576D, width B z1for 2.545D, import top board radius of arc R=0.3077D-0.0154m, straight entry section flow channels is made up of runner inner wall, the upper and lower sideline of runner and plane shape line are straight line, and section configuration is rectangle, and straight entry section adapts to pump house arrangement needs and guides current to enter water inlet flow channel; After described vertical shaft overcurrent section is positioned at straight entry section, the length L of vertical shaft overcurrent section jfor 3.586D, entrance width BL j1and height H j1be respectively 2.545D and 1.576D, vertical shaft overcurrent section flow channels is made up of runner inner wall and vertical shaft outer wall, the section configuration of runner becomes round along water (flow) direction gradually by side, the height of vertical shaft outer wall is constant, width adopts Olive Shape change curve, vertical shaft overcurrent section three-dimensional body adopts detailed cross section place figure and data sheet to represent, profile data comprises runner longitudinal section upper sideline coordinate (X j1i, Y j1i), lower sideline coordinate (X j2i, Y j2i), runner height H ji, width B L ji, transitional radius R jiwith shaft width BJ ji, vertical shaft overcurrent section guides current smoothly to be passed through by the both sides of this section of vertical shaft; Describedly pass through after the section of confluxing is positioned at vertical shaft overcurrent section mutually, pass through the length L of the section of confluxing mutually gfor 1.027D, entrance width BL g1and height H g1be respectively 2.212D and 1.576D, shaft width BJ g1for 1.08D, round platform diameter DY g1for 1.08D, passing through the section of confluxing mutually is that vertical shaft passes through in this section mutually with round platform, flow channels is made up of the inwall of runner and the outer wall of vertical shaft or round platform, and pass through the section of confluxing three-dimensional body mutually and adopt detailed cross section place figure and data sheet to represent, profile data comprises runner longitudinal section upper sideline coordinate (X g1i, Y g1i), lower sideline coordinate (X g2i, Y g2i), runner height H gi, width B L gi, transitional radius R gi, shaft width BJ giwith round platform diameter DY gi, passing through the section of confluxing mutually is that the two strands of current making to flow out from vertical shaft both sides to be favourable exchanged conjunction without impact Horizon; After described round platform rectification section is positioned at and passes through the section of confluxing mutually, the length L of round platform rectification section tfor 0.658D, tunnel inlets diameter DL t1with round platform inlet diameter DY t1be respectively 1.316D and 0.453D, runner exit diameter DL t2with round platform outlet diameter DY t2be respectively 0.973D and 0.367D, round platform rectification section flow channels is made up of runner inner wall and round platform outer wall, the shape of generatrix of runner inner wall and round platform outer wall is curve, round platform rectification section three-dimensional body adopts detailed cross section place figure and data sheet to represent, profile data comprises runner longitudinal section upper sideline coordinate (X t1i, Y t1i), lower sideline coordinate (X t2i, Y t2i), Flow diameter DL tiwith round platform diameter DY ti, round platform rectification section does last adjustment and acceleration to the current flowing to through-flow pump blade wheel chamber, to ensure that current enter through-flow pump blade wheel chamber very equably;
(2) the straight entry section utilizing step (1) to determine, vertical shaft overcurrent section, pass through the section of confluxing and round platform rectification section construction geometry characteristic parameter mutually, the Size calculation intending the through-flow pump impeller diameter D adopted according to pumping plant goes out the size needed for preposition vertical shaft type through-flow pump water inlet flow channel;
(3) the length L of the straight entry section determined according to step (1) zfor 0.8D, can carry out on this basis lengthening or shortening L according to the needs of pump house arrangement zadjustment;
(4) width B of the straight entry section determined according to step (1) z1for 2.545D, the needs according to pump house arrangement can carry out strengthening or reducing B on this basis z1adjustment, the runner plane shape line of described vertical shaft overcurrent section is adjusted accordingly simultaneously;
(5) step (3), (4) adjustment to preposition vertical shaft type through-flow pump water inlet flow channel straight entry section geometric parameter do not change the geometric parameter passing through the section of confluxing and round platform rectification section mutually that step (1) is determined;
(6) according to each geometric parameter of preposition vertical shaft type through-flow pump water inlet flow channel converted and after adjustment, the preposition vertical shaft type through-flow pump water inlet flow channel single line drawing needed for drafting.
CN201410523511.1A 2014-10-02 2014-10-02 A kind of preposition vertical shaft type through-flow pump water inlet flow channel of hydraulic performance excellence and application process thereof Active CN104294883B (en)

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