CN105715586A - Excellent-hydraulic-performance inlet conduit of tubular-type axial flow pump device with front-mounted bulb and application method - Google Patents
Excellent-hydraulic-performance inlet conduit of tubular-type axial flow pump device with front-mounted bulb and application method Download PDFInfo
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- CN105715586A CN105715586A CN201610035774.7A CN201610035774A CN105715586A CN 105715586 A CN105715586 A CN 105715586A CN 201610035774 A CN201610035774 A CN 201610035774A CN 105715586 A CN105715586 A CN 105715586A
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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
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
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Abstract
The invention provides an excellent-hydraulic-performance inlet conduit of a tubular-type axial flow pump device with a front-mounted bulb and an application method, and belongs to the technical field of pump stations of water conservancy projects. The excellent-hydraulic-performance inlet conduit of the tubular-type axial flow pump device with the front-mounted bulb is characterized in that the bulb is transferred from the inside of an outlet conduit, and the problem that water flow in the outlet conduit flows diffusively so that vortexes are quite easily generated is solved thoroughly; the bulb is placed in the inlet conduit, and because water flow in the inlet conduit flows in a contractive manner, the circumstance that vortexes are generated due to flow separation when the water flow flows through the bulb is avoided; and the inlet conduit is sequentially divided into a linear inlet section, a bulb flow passing section and a bottle-neck-shaped circular truncated cone flow adjustment section in the water flow direction, and the bottle-neck-shaped circular truncated cone flow adjustment section which is used for adjusting inlet flow patterns is arranged between the bulb flow passing section and a water pump impeller chamber. The obtained inlet conduit of the tubular-type axial flow pump device with the front-mounted bulb not only has excellent hydraulic performance, but also thoroughly solves the problem of vortexes in the outlet conduit of the tubular-type axial flow pump device with the rear-mounted bulb.
Description
Technical field
The invention belongs to hydraulic engineering pumping plant technical field, it is specifically related to the excellent bulb forward type tubular pump water inlet flow channel of a kind of hydraulic performance and application process, it is adaptable to instruct engineers and technicians to design the bulb forward type tubular pump water inlet flow channel at high-performance high-capacity pump station.
Background technology
Bulb tubular pump device be applicable to lift lower than 3m, run the high-capacity pump station of thousands of hours year, the feature of this pattern pump installation is to be arranged on by the equipment such as engine, bearing and gear-box in a metal shell being commonly called as " bulb " closed.Enter the tubular pump that high-capacity pump station for some years all habitually adopts bulb rear-mounted, it may be assumed that be placed in outlet passage by described bulb.More deep research finds: when bulb is rearmounted, from the current with circular rector of water pump guide vane body outflow when flowing through lamps foam, can produce bigger, amesiality vortex region at its afterbody.This phenomenon increases the loss of flood peak of outlet passage, and result in pressure fluctuation and the instability of current in outlet passage.
Summary of the invention
The purpose of the present invention is aiming at above-mentioned situation, it is provided that the bulb forward type tubular pump water inlet flow channel of a kind of hydraulic performance excellence and application process.The invention is characterized in that bulb from removal in outlet passage, thoroughly solve the problem because the flow properties of current in outlet passage is diffusional flow and very easily produces vortex；Bulb is placed in water inlet flow channel, utilizes the feature that in water inlet flow channel, the flow properties of current is contraction flow, it is ensured that during current flowing through lamps foam, do not produce vortex because of the separation of flow；Described water inlet flow channel is divided into linear inducer, bulb to cross stream section and bottleneck round platform rectification section etc. 3 sections along water (flow) direction order, the bottleneck round platform rectification section being arranged to adjust Inlet flow pattern between stream section and water pump vane room is crossed, it is ensured that current enter the fluidised form of water pump vane room and meet requirement at bulb；To comprising bulb, enter manhole, bulb support, each flow passage components such as bulb bottleneck round platform water inlet flow channel be optimized Hydraulic design, it is provided that hydraulic performance is excellent, apply convenient water inlet flow channel three-dimensional body flow-passing surface；The physical dimension of each flow-passing surface of described water inlet flow channel is all in order to water pump vane diameter D0Relative value for reference value represents, relative value is multiplied by the water pump vane diameter D that pumping plant is intended adopting0The size that is actually needed of this pumping plant water inlet flow channel；The key dimension of outlet passage can be adjusted within the specific limits, to adapt to being actually needed of different pumping plant.The bulb forward type tubular pump water inlet flow channel not only hydraulic performance excellence that the application present invention is obtained, and thoroughly solve the vortex problem in the rear-mounted tubular pump water inlet flow channel of bulb, it is of great significance with Effec-tive Function tool for guaranteeing that high-capacity pump station is safe and stable.
For realizing the purpose of the present invention, adopt the following technical scheme that
1. the bulb forward type tubular pump water inlet flow channel that hydraulic performance is excellent, is divided into linear inducer, bulb to cross stream section and bottleneck round platform rectification section etc. 3 sections along water (flow) direction order；
The described bulb forward type each physical dimension of tubular pump water inlet flow channel is all in order to water pump vane diameter D0Relative value for reference value represents；
Linear inducer is positioned at the front portion of bulb forward type tubular pump water inlet flow channel, and its effect is to adapt to the needs of pump house superstructure layout and current are carried out preliminary rectification；Portion arranges middle dividing pier in this paragraph, and the inwall shape line of this section of water inlet flow channel is straight line；The length L of this section of water inlet flow channelInducer=2.183D0, admission section height HInducer import=1.887D0, admission section width BInducer import=2.467D0, Outlet Section height HInducer exports=1.714D0, Outlet Section width BInducer exports=2.130D0, import top board arc radius RTop board=1m, the length L of middle dividing pierDividing pier=2.183D0, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m；
Bulb is crossed after stream section is positioned at linear inducer, and this section is used for placing bulb and appurtenance thereof and current being adjusted further；The bulb of this section is made up of bowl-type rotary body and cylinder, arranges on described cylindrical top into manhole, arranges two parallel bulbs in described cylindrical bottom and supports；The inwall shape line of this section of water inlet flow channel adopts detailed cross section place figure and tables of data to represent, tables of data includes runner vertical section upper sideline coordinate (XUpper i, YUpper i), lower sideline coordinate (XLower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 1；Each point numbering j and the coordinate of described bowl-type rotary body bus are listed in table 2；Described cylindrical length LCylinder=1.131D0, cross section diameter DCylinder=0.926D0；Entering manhole is streamlined cylinder, its length LEnter manhole=1.131D0, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；Bulb is supported for elongated streamline cylinder, its length LSupport=1.375D0, width BSupport=0.1D0, head arc radius Rc1=0.05D0, afterbody arc radius Rc2=0.476D0；
Table 1 bulb crosses stream section runner profile data table
Table 2 bowl-type rotary body bus each point numbering and coordinate
Bottleneck round platform rectification section is positioned at after bulb crosses stream section, this section for current are carried out final rectification, with ensure uniform fluid flow straight enter water pump vane room；This section of water inlet flow channel body is bottleneck round platform, sets the bulb bottleneck round platform being connected with described cylinder afterbody in water inlet flow channel bottleneck round platform；The length L of bottleneck round platform rectification sectionRectification section=1.251D0, the inlet diameter D of water inlet flow channel bottleneck round platformRunner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0And 0.984D0, the inlet diameter D of bulb bottleneck round platformBulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0And 0.354D0；The bus of this section of water inlet flow channel bottleneck round platform and the bus of bulb bottleneck round platform are all in order to impeller diameter D0Relative value for reference value represents, each point numbering k of both buses and coordinate are listed in table 3 and table 4 respectively；
Table 3 water inlet flow channel bottleneck round platform bus each point numbering and coordinate
Table 4 bulb bottleneck round platform bus each point numbering and coordinate
Described water inlet flow channel three-dimensional body flow-passing surface by the inwall of water inlet flow channel and middle dividing pier, bowl-type rotary body, cylinder, enter manhole, bulb supports, the outer wall of bulb bottleneck round platform is constituted.
2. an application process for the bulb forward type tubular pump water inlet flow channel that hydraulic performance is excellent, comprises the following steps:
(1) the described bulb forward type each physical dimension of tubular pump water inlet flow channel is all in order to impeller diameter D0Relative value for reference value represents；
(2) the bulb forward type tubular pump water inlet flow channel that a kind of hydraulic performance is excellent, is divided into linear inducer, bulb to cross stream section and bottleneck round platform rectification section etc. 3 sections along water (flow) direction order；
Linear inducer is positioned at the front portion of bulb forward type tubular pump water inlet flow channel, and its effect is to adapt to the needs of pump house superstructure layout and current are carried out preliminary rectification；Portion arranges middle dividing pier in this paragraph, and the inwall shape line of this section of water inlet flow channel is straight line；The length L of this section of water inlet flow channelInducer=2.183D0, admission section height HInducer import=1.887D0, admission section width BInducer import=2.467D0, Outlet Section height HInducer exports=1.714D0, Outlet Section width BInducer exports=2.130D0, import top board arc radius RTop board=1m, the length L of middle dividing pierDividing pier=2.183D0, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m；
Bulb is crossed after stream section is positioned at linear inducer, and this section is used for placing bulb and appurtenance thereof and current being adjusted further；The bulb of this section is made up of bowl-type rotary body and cylinder, arranges on described cylindrical top into manhole, arranges two parallel bulbs in described cylindrical bottom and supports；The inwall shape line of this section of water inlet flow channel adopts detailed cross section place figure and tables of data to represent, tables of data includes runner vertical section upper sideline coordinate (XUpper i, YUpper i), lower sideline coordinate (XLower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 1；Each point numbering j and the coordinate of described bowl-type rotary body bus are listed in table 2；Described cylindrical length LCylinder=1.131D0, cross section diameter DCylinder=0.926D0；Entering manhole is streamlined cylinder, its length LEnter manhole=1.131D0, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；Bulb is supported for elongated streamline cylinder, its length LSupport=1.375D0, width BSupport=0.1D0, head arc radius Rc1=0.05D0, afterbody arc radius Rc2=0.476D0；
Bottleneck round platform rectification section is positioned at after bulb crosses stream section, this section for current are carried out final rectification, with ensure uniform fluid flow straight enter water pump vane room；This section of water inlet flow channel body is bottleneck round platform, sets the bulb bottleneck round platform being connected with described cylinder afterbody in water inlet flow channel bottleneck round platform；The length L of bottleneck round platform rectification sectionRectification section=1.251D0, the inlet diameter D of water inlet flow channel bottleneck round platformRunner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0And 0.984D0, the inlet diameter D of bulb bottleneck round platformBulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0And 0.354D0；The bus of this section of water inlet flow channel bottleneck round platform and the bus of bulb bottleneck round platform are all in order to impeller diameter D0Relative value for reference value represents, each point numbering k of both buses and coordinate are listed in table 3 and table 4 respectively；
Described water inlet flow channel three-dimensional body flow-passing surface by the inwall of water inlet flow channel and middle dividing pier, bowl-type rotary body, cylinder, enter manhole, bulb supports, the outer wall of bulb bottleneck round platform is constituted；
(3) the length L of described bulb forward type tubular pump water inlet flow channel linear inducerInducerWith admission section width BInducer importRespectively 2.183D0With for 2.467D0, both of which can needing increase on this basis or reducing according to pump house arrangement；
(4) described cylindrical length LCylinderWith diameter DCylinderRespectively 1.131D0And 0.926D0, the requirement that both of which can be arranged according to described cylinder in-vivo device on this basis suitably strengthens or reduces；
(5) described cylindrical length LCylinderChange into L 'CylinderAfter, described bulb crosses the length L of stream sectionCross the section of streamChange into therewith
L′Cross the section of stream=L 'Cylinder+0.596D0
In formula, L 'Cross the section of streamRepresent that the bulb after adjusting crosses the length of stream section, L 'CylinderRepresent the cylindrical length after adjusting；
(6) described cylindrical diameter changes into D'CylinderAfter, the bus of described bowl-type rotary body and bulb bottleneck round platform is both needed to be adjusted accordingly；
The Adjustable calculation formula of described bowl-type rotary body bus is as follows:
X'j=Xj
In formula, XjAnd YjThe respectively coordinate of described bowl-type rotary body bus jth point X-direction and Y-direction, (j=1,2 ..., 11)；X'jAnd Y'jBowl-type rotary body bus jth point X-direction after respectively adjusting and the coordinate of Y-direction, (j=1,2 ..., 11)；DCylinderAnd D'CylinderDiameter before respectively described cylinder adjusts and after adjustment；
The Adjustable calculation formula of described bulb bottleneck round platform bus is as follows:
X'k=Xk
In formula, XkAnd YkThe respectively coordinate of described bulb bottleneck round platform bus kth point X-direction and Y-direction, (k=1,2 ..., 11)；X'kAnd Y'kBulb bottleneck round platform bus kth point X-direction after respectively adjusting and the coordinate of Y-direction, (k=1,2 ..., 11)；DCylinderAnd D'CylinderDiameter before respectively described cylinder adjusts and after adjustment；
(7) relative value of the described bulb forward type each physical dimension of tubular pump water inlet flow channel is multiplied by the water pump vane diameter D that pumping plant is intended adopting0Size needed for this pumping plant water inlet flow channel, unit is m；
(8) according to the bulb forward type each geometric parameter of tubular pump water inlet flow channel after calculating and adjusting, its line chart is drawn.
Compared with prior art, the method have the advantages that
First, the bulb of high-capacity pump station bulb tubular pump device is moved in water inlet flow channel by the present invention in water inlet flow channel, overcome because in water inlet flow channel, the flow properties of current is diffusional flow and very easily produces the disadvantage of vortex, taking full advantage of the flow properties of current in water inlet flow channel is the feature of contraction flow, produces the obstinate disease of vortex when thoroughly solving current flowing through lamps foam because of the separation of flow；
Second, bulb forward type tubular pump water inlet flow channel provided by the invention is divided into linear inducer, bulb to cross stream section and bottleneck round platform rectification section along water (flow) direction；Forebay of Pumping Station incoming flow is made just successive step by linear inducer, and bulb is crossed stream section and guided current to be passed through by bulb surrounding in an orderly manner, and current are adjusted to uniform state entrance water pump vane room by bottleneck round platform rectification section；To the middle dividing pier in water inlet flow channel and water inlet flow channel, bulb, enter manhole, bulb support, bulb bottleneck round platform etc. and there are the parts of flow-passing surface be optimized Hydraulic design, it is provided that hydraulic performance is excellent, apply convenient three-dimensional body flow-passing surface；
3rd, the bulb forward type all physical dimensions of tubular pump water inlet flow channel of the present invention are in order to water pump vane diameter D0Relative value for reference value represents, these relative value are multiplied by water pump vane diameter D0Can obtaining the required channel size at high-capacity pump station, the length and width of runner can be conveniently carried out adjusting according to being actually needed of different pumping plants within the specific limits, and using method is simple, it is simple to engineers and technicians apply；
4th, the bulb forward type tubular pump water inlet flow channel flow-shape smooth-going that the application present invention obtains is uniform, streamline is well arranged, hydraulic performance is excellent, the designing quality of high-capacity pump station bulb tubular pump device water inlet flow channel can be ensured, significant for guaranteeing the safe and stable of pumping plant and Effec-tive Function.
Accompanying drawing explanation
Fig. 1 a is bulb forward type tubular pump water inlet flow channel longitudinal direction cross-sectional schematic of the present invention；
Fig. 1 b is bulb forward type tubular pump water inlet flow channel transverse direction cross-sectional schematic of the present invention；
Fig. 2 a is bulb forward type tubular pump water inlet flow channel member and main geometric schematic diagram of the present invention；
Fig. 2 b is bulb forward type tubular pump water inlet flow channel member and main geometric schematic diagram of the present invention；
Fig. 2 c is A-A sectional schematic diagram in Fig. 2 a and Fig. 2 b；
Fig. 3 a is that bulb of the present invention crosses stream section runner cross section place facade direction schematic diagram；
Fig. 3 b is that bulb of the present invention crosses stream section runner cross section place in-plane schematic diagram；
Fig. 4 is the bowl-type rotary body bus various point locations schematic diagram of the present invention；
Fig. 5 a is the runner bottleneck round platform bus various point locations schematic diagram of the present invention；
Fig. 5 b is the bulb bottleneck round platform bus various point locations schematic diagram of the present invention；
Fig. 6 is bulb forward type tubular pump water inlet flow channel three-dimensional body flow-passing surface schematic diagram of the present invention；
Fig. 7 a is that linear entrance length of the present invention adjusts schematic diagram；
Fig. 7 b is linear inducer admission section width adjustment schematic diagram of the present invention；
Fig. 8 a is that bulb of the present invention crosses stream section cylinder length adjustment schematic diagram；
Fig. 8 b is that bulb of the present invention crosses stream section cylinder diameter adjustment schematic diagram；
In figure: 1 linear inducer, 2 bulbs cross stream section, 3 bottleneck round platform rectification sections, dividing pier in 4,5 bowl-type rotary bodies, 6 cylinders, 7 enter manhole, and 8 bulbs support, 9 water inlet flow channel bottleneck round platforms, 10 bulb bottleneck round platforms, 11 vertical section upper sidelines, 12 vertical section lower sidelines.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
1. the bulb forward type tubular pump water inlet flow channel that hydraulic performance is excellent, is divided into linear inducer 1, bulb to cross stream section 2 and bottleneck round platform rectification section 3 etc. 3 sections along water (flow) direction order, as illustrated in figs. ia and ib；
The described bulb forward type each physical dimension of tubular pump water inlet flow channel is all in order to water pump vane diameter D0Relative value for reference value represents；
Linear inducer 1 is positioned at the front portion of bulb forward type tubular pump water inlet flow channel, and its effect is to adapt to the needs of pump house superstructure layout and current are carried out preliminary rectification；As shown in Figure 1 b, portion arranges middle dividing pier 4 in this paragraph, and the inwall shape line of this section of water inlet flow channel is straight line；As shown in Figure 2 a and 2 b, the length L of this section of water inlet flow channelInducer=2.183D0, admission section height HInducer import=1.887D0, admission section width BInducer import=2.467D0, Outlet Section height HInducer exports=1.714D0, Outlet Section width BInducer exports=2.130D0, import top board arc radius RTop board=1m, the length L of middle dividing pierDividing pier=2.183D0, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m；
Bulb is crossed after stream section 2 is positioned at linear inducer 1, and this section is used for placing bulb and appurtenance thereof and current being adjusted further；As illustrated in figs. ia and ib, the bulb of this section is made up of bowl-type rotary body 5 and cylinder 6；As shown in Fig. 1 a and Fig. 1 c, arrange on the top of described cylinder 6 into manhole 7, two parallel bulbs are set in the bottom of described cylinder 6 and support 8；The inwall shape line of this section of water inlet flow channel adopts detailed cross section place figure and tables of data to represent, each cross section place is shown in Fig. 3 a and Fig. 3 b, and tables of data includes the coordinate (X of runner vertical section upper sideline 11Upper i, YUpper i), the coordinate (X of vertical section lower sideline 12Lower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 1；Each point numbering j and the coordinate of described bowl-type rotary body 5 bus are listed in table 2, and this bus various point locations is shown in Fig. 4；As shown in Figure 2 a and 2 b, the length L of described cylinder 6Cylinder=1.131D0, cross section diameter DCylinder=0.926D0；Enter manhole 7 for streamlined cylinder, its length LEnter manhole=1.131D0, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；It is elongated streamline cylinder that bulb supports 8, its length LSupport=1.375D0, width BSupport=0.1D0, head arc radius Rc1=0.05D0, afterbody arc radius Rc2=0.476D0；
Bottleneck round platform rectification section 3 is positioned at after bulb crosses stream section 2, this section for current are carried out final rectification, with ensure uniform fluid flow straight enter water pump vane room；This section of water inlet flow channel body is bottleneck round platform, sets the bulb bottleneck round platform 10 being connected with described cylinder 6 afterbody in water inlet flow channel bottleneck round platform 9；As shown in Figure 2 a and 2 b, the length L of bottleneck round platform rectification section 3Rectification section=1.251D0, the inlet diameter D of water inlet flow channel bottleneck round platform 9Runner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0And 0.984D0, the inlet diameter D of bulb bottleneck round platform 10Bulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0And 0.354D0；The bus of this section of water inlet flow channel bottleneck round platform 9 and the bus of bulb bottleneck round platform 10 are all in order to impeller diameter D0Relative value for reference value represents, each point numbering k of both buses and coordinate are listed in table 3 and table 4 respectively, and the various point locations of both buses is shown in Fig. 5 a and Fig. 5 b；
Described water inlet flow channel three-dimensional body flow-passing surface by the inwall of water inlet flow channel and middle dividing pier 4, bowl-type rotary body 5, cylinder 6, enter manhole 7, bulb supports 8, the outer wall of bulb bottleneck round platform 10 is constituted, as shown in Figure 6.
2. an application process for the bulb forward type tubular pump water inlet flow channel that hydraulic performance is excellent, comprises the following steps:
(1) the described bulb forward type each physical dimension of tubular pump water inlet flow channel is all in order to impeller diameter D0Relative value for reference value represents；
(2) the bulb forward type tubular pump water inlet flow channel that a kind of hydraulic performance is excellent, is divided into linear inducer 1, bulb to cross stream section 2 and bottleneck round platform rectification section 3 etc. 3 sections along water (flow) direction order, as illustrated in figs. ia and ib；
Linear inducer 1 is positioned at the front portion of bulb forward type tubular pump water inlet flow channel, and its effect is to adapt to the needs of pump house superstructure layout and current are carried out preliminary rectification；As shown in Figure 1 b, portion arranges middle dividing pier 4 in this paragraph, and the inwall shape line of this section of water inlet flow channel is straight line；As shown in Figure 2 a and 2 b, the length L of this section of water inlet flow channelInducer=2.183D0, admission section height HInducer import=1.887D0, admission section width BInducer import=2.467D0, Outlet Section height HInducer exports=1.714D0, Outlet Section width BInducer exports=2.130D0, import top board arc radius RTop board=1m, the length L of middle dividing pierDividing pier=2.183D0, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m；
Bulb is crossed after stream section 2 is positioned at linear inducer 1, and this section is used for placing bulb and appurtenance thereof and current being adjusted further；As illustrated in figs. ia and ib, the bulb of this section is made up of bowl-type rotary body 5 and cylinder 6；As illustrated in figs. ia and ib, arrange on the top of described cylinder 6 into manhole 7, two parallel bulbs are set in the bottom of described cylinder 6 and support 8；The inwall shape line of this section of water inlet flow channel adopts detailed cross section place figure and tables of data to represent, each cross section place is shown in Fig. 3 a and Fig. 3 b, and tables of data includes the coordinate (X of runner vertical section upper sideline 11Upper i, YUpper i), the coordinate (X of lower sideline 12Lower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 1；Each point numbering j and the coordinate of described bowl-type rotary body 5 bus are listed in table 2, and this bus various point locations is shown in Fig. 4；As shown in Figure 2 a and 2 b, the length L of described cylinder 6Cylinder=1.131D0, cross section diameter DCylinder=0.926D0；Enter manhole 7 for streamlined cylinder, its length LEnter manhole=1.131D0, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；It is elongated streamline cylinder that bulb supports 8, its length LSupport=1.375D0, width BSupport=0.1D0, head arc radius Rc1=0.05D0, afterbody arc radius Rc2=0.476D0；
Bottleneck round platform rectification section 3 is positioned at after bulb crosses stream section 2, this section for current are carried out final rectification, with ensure uniform fluid flow straight enter water pump vane room；This section of water inlet flow channel body is bottleneck round platform, sets the bulb bottleneck round platform 10 being connected with described cylinder 6 afterbody in water inlet flow channel bottleneck round platform 9；As shown in Figure 2 a and 2 b, the length L of bottleneck round platform rectification section 3Rectification section=1.251D0, the inlet diameter D of water inlet flow channel bottleneck round platform 9Runner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0And 0.984D0, the inlet diameter D of bulb bottleneck round platform 10Bulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0And 0.354D0；The bus of this section of water inlet flow channel bottleneck round platform 9 and the bus of bulb bottleneck round platform 10 are all in order to impeller diameter D0Relative value for reference value represents, each point numbering k of both buses and coordinate are listed in table 3 and table 4 respectively, and the various point locations of both buses is shown in Fig. 5 a and Fig. 5 b；
Described water inlet flow channel three-dimensional body flow-passing surface by the inwall of water inlet flow channel and middle dividing pier 4, bowl-type rotary body 5, cylinder 6, enter manhole 7, bulb supports 8, the outer wall of bulb bottleneck round platform 10 is constituted, as shown in Figure 6；
(3) the length L of described bulb forward type tubular pump water inlet flow channel linear inducer 1InducerWith admission section width BInducer importRespectively 2.183D0With for 2.467D0, both of which can needing minimizing on this basis or increasing according to pump house arrangement；
Shorten or lengthen LInducerMode as shown in Figure 7a, in figure, L "InducerRepresent the length of the linear inducer 1 after shortening, L ' "InducerRepresent the length of the linear inducer 1 after lengthening；
Reduce or increase BInducer importMode as shown in Figure 7b, in figure, B "Inducer importRepresent the admission section width of the linear inducer 1 after reducing, B ' "Inducer importRepresent the admission section width of the linear inducer 1 after increasing；
(4) the length L of described cylinder 6CylinderWith diameter DCylinderRespectively 1.131D0And 0.926D0, the requirement that both of which can be arranged according to equipment in described cylinder 6 on this basis suitably reduces or increases；
Shorten or lengthen LCylinderMode as shown in Figure 8 a, in figure, L "CylinderRepresent the length of the cylinder 6 after shortening, L ' "CylinderRepresent the length of the cylinder 6 after lengthening；
Reduce or strengthen DCylinderMode as shown in Figure 8 b, in figure, D ' "CylinderRepresent the diameter of the cylinder 6 after reducing, D ' "CylinderRepresent the diameter of the cylinder 6 after strengthening；
(5) the length L of described cylinder 6CylinderAfter change, described bulb is crossed the length of stream section 2 and is changed into L ' therewithCross the section of stream=L 'Cylinder+0.596D0, in formula, L 'Cross the section of streamRepresent that the bulb after adjusting crosses the length of stream section 2, L 'CylinderRepresent the length of the cylinder 6 after adjusting；
(6) the diameter D of described cylinder 6CylinderAfter change, the bus of described bowl-type rotary body 5 and bulb bottleneck round platform 10 is both needed to be adjusted accordingly；
The bus Adjustable calculation formula of described bowl-type rotary body 5 is as follows:
X'j=Xj
In formula, XjAnd YjThe respectively coordinate of described bowl-type rotary body 5 bus jth point X-direction and Y-direction, (j=1,2 ..., 11)；X'jAnd Y'jBowl-type rotary body 5 bus jth point X-direction after respectively adjusting and the coordinate of Y-direction, (j=1,2 ..., 11)；DCylinderAnd D'CylinderDiameter before respectively described cylinder adjusts and after adjustment；
Bus Adjustable calculation formula according to bowl-type rotary body 5, to DCylinderThe bus of the bowl-type rotary body 5 when strengthening or reduce is adjusted, and the bus of the bowl-type rotary body 5 after adjustment is as shown in Figure 8 b；
The bus Adjustable calculation formula of described bulb bottleneck round platform 10 is as follows:
X'k=Xk
In formula, XkAnd YkThe respectively coordinate of described bulb bottleneck round platform 10 bus kth point X-direction and Y-direction, (k=1,2 ..., 11)；X'kAnd Yk' respectively adjust after bulb bottleneck round platform 10 bus kth point X-direction and the coordinate of Y-direction, (k=1,2 ..., 11)；DCylinderAnd D'CylinderDiameter before respectively described cylinder adjusts and after adjustment；
Bus Adjustable calculation formula according to bulb bottleneck round platform 10, to DCylinderThe bus of the bulb bottleneck round platform 10 when reducing or strengthen is adjusted, and the bus of the bulb bottleneck round platform 10 after adjustment is as shown in Figure 8 b；
(7) relative value of the described bulb forward type each physical dimension of tubular pump water inlet flow channel is multiplied by the water pump vane diameter D that pumping plant is intended adopting0Size needed for this pumping plant water inlet flow channel, unit is m；
(8) according to the bulb forward type each geometric parameter of tubular pump water inlet flow channel after calculating and adjusting, AUTOCAD software is drawn its line chart.
Embodiment
The present embodiment high-capacity pump station adopts bulb forward type tubular pump, water pump vane diameter D0=3.2m, require that the application present invention designs the water inlet flow channel that hydraulic performance is excellent, according to the needs that pumping plant civil engineering and motor device are arranged, it is determined that linear entrance length and admission section width respectively 7.25m and 8.0m, cylinder length and diameter respectively 3.8m and 2.88m.
The step of the present embodiment high-capacity pump station water inlet flow channel of application present invention design is as follows:
1. as illustrated in figs. ia and ib, include linear inducer 1 according to the described water inlet flow channel of present invention design along water (flow) direction, bulb crosses stream section 2 and bottleneck round platform rectification section 3 etc. 3 sections；The middle part of linear inducer 1 arranges middle dividing pier 4；Bulb cross in stream section 2 place bulb and attached enter manhole 7, bulb support 8；Bulb is made up of bowl-type rotary body 5 and cylinder 6；Arrange on the top of described cylinder 6 into manhole 7, two parallel bulbs are set in the bottom of described cylinder 6 and support 8；Bottleneck round platform rectification section 3 is made up of water inlet flow channel bottleneck round platform 9 and bulb bottleneck round platform 10；
The present embodiment bulb forward type tubular pump water inlet flow channel each physical dimension relative value of application present invention design is multiplied by the water pump vane diameter D at described high-capacity pump station0=3.2m, obtains the size of this pumping plant bulb forward type tubular pump water inlet flow channel:
(1) the length L of the water inlet flow channel of linear inducer 1Inducer=2.183D0=6.986m, admission section height HInducer import=1.887D0=6.038m, admission section width BInducer import=2.467D0=7.894m, Outlet Section height HInducer exports=1.714D0=5.484m, Outlet Section width BInducer exports=2.130D0=6.816m, import top board arc radius RTop board=1m, the length L of middle dividing pier 4Dividing pier=2.183D0=6.986m, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m；
(2) bulb is crossed the profile data of water inlet flow channel inwall shape line of stream section 2 and is included the coordinate (X of runner vertical section upper sideline 11Upper i, YUpper i), the coordinate (X of lower sideline 12Lower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 5；Each point numbering j and the coordinate of bowl-type rotary body 5 bus are listed in table 6；The length L of cylinder 6Cylinder=1.131D0=3.619m, cross section diameter DCylinder=0.926D0=2.964m；Enter the length L of manhole 7Enter manhole=1.131D0=3.619m, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；Bulb supports the length L of 8Support=1.375D0=4.4m, width BSupport=0.1D0=0.32m, head arc radius Rc1=0.05D0=0.16m, afterbody arc radius Rc2=0.476D0=1.523m；
The bulb of table 5 the present embodiment crosses stream section runner profile data table
The bowl-type rotary body bus each point numbering of table 6 the present embodiment and coordinate
(3) the length L of bottleneck round platform rectification section 3Rectification section=1.251D0=4.003m, the inlet diameter D of water inlet flow channel bottleneck round platform 9Runner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0=5.484m and 0.984D0=3.148m, the inlet diameter D of bulb bottleneck round platform 10Bulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0=2.964m and 0.354D0=1.132m；The bus of water inlet flow channel bottleneck round platform 9 and the bus each point numbering k of bulb bottleneck round platform 10 and coordinate are listed in table 7 and table 8 respectively；
The water inlet flow channel bottleneck round platform bus each point numbering of table 7 the present embodiment and coordinate
The bulb bottleneck round platform bus each point numbering of table 8 the present embodiment and coordinate
2. the present embodiment high-capacity pump station requires that the length of linear inducer 1 is 7.25m, according to the length L of calculated linear inducer 1 in the 1st big step the (1) stepInducer=6.986m, need to lengthen 0.264m, lengthens mode as shown in Figure 7a；
3. the present embodiment high-capacity pump station requires that the admission section width of linear inducer 1 is 8.0m, according to the admission section width B of calculated linear inducer 1 in the 1st big step the (1) stepInducer import=7.894m, need to widen 0.106m, and add wide way is as shown in Figure 7b；
4. the present embodiment high-capacity pump station requires that the length of cylinder 6 is 3.8m, according to the length L of calculated cylinder 6 in the 1st big step the (2) stepCylinder=3.619m, need to lengthen 0.181m, lengthens mode as shown in Figure 8 a；Bulb is crossed the length of stream section 2 and is changed into L 'Cross the section of stream=L 'Cylinder+0.596D0=3.8+0.596 × 3.2=5.707m, lengthens mode as shown in Figure 8 a；
5. the present embodiment high-capacity pump station requires that the diameter of cylinder 6 is 2.88m, according to the diameter D of calculated cylinder 6 in the 1st big step the (2) stepCylinder=2.96m, need to reduce 0.08m, reduces mode as shown in Figure 8 b；
Cylinder diameter DCylinderAfter being decreased to 2.88m by 2.96m, the bus of bowl-type rotary body 5 need to adjust accordingly according to bowl-type rotary body bus Adjustable calculation formula, and the bus each point numbering j of the bowl-type rotary body 5 after adjustment and coordinate are listed in table 9；
Bowl-type rotary body bus each point numbering and coordinate after the adjustment of table 9 the present embodiment
Cylinder diameter DCylinderAfter being decreased to 2.88m by 2.96m, the bus of bulb bottleneck round platform 10 need to adjust accordingly according to bulb bottleneck round platform 10 bus Adjustable calculation formula, and bus each point numbering k and the coordinate of the bulb bottleneck round platform 10 after adjustment are listed in table 10；
Bulb bottleneck round platform bus each point numbering and coordinate after the adjustment of table 10 the present embodiment
6., according to each geometric parameter of described water inlet flow channel after calculating and adjusting, AUTOCAD software is drawn its line chart.
Claims (7)
1. a bulb forward type tubular pump water inlet flow channel, is characterized in that,
Described water inlet flow channel is divided into linear inducer, bulb to cross stream section and bottleneck round platform rectification section 3 sections along water (flow) direction order；
Linear inducer is positioned at the front portion of bulb forward type tubular pump water inlet flow channel, and linear inducer effect is to adapt to the needs of pump house superstructure layout and current are carried out preliminary rectification；Dividing pier in arranging in the middle part of linear inducer, the inwall shape line of linear inducer water inlet flow channel is straight line；
Bulb is crossed after stream section is positioned at linear inducer, is used for placing bulb and appurtenance thereof and current being adjusted further；Bulb is crossed the bulb of stream section and is made up of bowl-type rotary body and cylinder, arranges on described cylindrical top into manhole, and cylindrical bottom arranges two parallel bulbs and supports；Entering manhole is streamlined cylinder；Bulb is supported for elongated streamline cylinder；
Bottleneck round platform rectification section is positioned at after bulb crosses stream section, for current are carried out final rectification, with ensure uniform fluid flow straight enter water pump vane room；Bottleneck round platform rectification section water inlet flow channel body is bottleneck round platform, sets the bulb bottleneck round platform being connected with described cylinder afterbody in water inlet flow channel bottleneck round platform；
The three-dimensional body flow-passing surface of described bulb forward type tubular pump water inlet flow channel by the inwall of water inlet flow channel and middle dividing pier, bowl-type rotary body, cylinder, enter manhole, bulb supports, the outer wall of bulb bottleneck round platform is constituted；
The described bulb forward type each physical dimension of tubular pump water inlet flow channel is all in order to water pump vane diameter D0Relative value for benchmark represents.
2. bulb forward type tubular pump water inlet flow channel according to claim 1, is characterized in that, the length L of described linear inducer water inlet flow channelInducer=2.183D0, admission section height HInducer import=1.887D0, admission section width BInducer import=2.467D0, Outlet Section height HInducer exports=1.714D0, Outlet Section width BInducer exports=2.130D0, import top board arc radius RTop board=1m, the length L of middle dividing pierDividing pier=2.183D0, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m.
3. bulb forward type tubular pump water inlet flow channel according to claim 1, is characterized in that, described bulb is crossed the inwall shape line of stream section water inlet flow channel and adopted cross section place figure and tables of data to represent, tables of data includes runner vertical section upper sideline coordinate (XUpper i, YUpper i), lower sideline coordinate (XLower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 1；Each point numbering j and the coordinate of described bowl-type rotary body bus are listed in table 2；Described cylindrical length LCylinder=1.131D0, cross section diameter DCylinder=0.926D0；Entering manhole is streamlined cylinder, enters the length L of manholeEnter manhole=1.131D0, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；Bulb is supported for elongated streamline cylinder, the length L that bulb supportsSupport=1.375D0, width BSupport=0.1D0, head arc radius Rc1=0.05D0, afterbody arc radius Rc2=0.476D0；
Table 1 bulb crosses stream section runner profile data table
Table 2 bowl-type rotary body bus each point numbering and coordinate
4. bulb forward type tubular pump water inlet flow channel according to claim 1, is characterized in that, the length L of described bottleneck round platform rectification sectionRectification section=1.251D0, the inlet diameter D of water inlet flow channel bottleneck round platformRunner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0And 0.984D0, the inlet diameter D of bulb bottleneck round platformBulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0And 0.354D0；Each point numbering k and the coordinate of the bus of water inlet flow channel bottleneck round platform and the bus of bulb bottleneck round platform are listed in table 3 and table 4 respectively；
Table 3 water inlet flow channel bottleneck round platform bus each point numbering and coordinate
Table 4 bulb bottleneck round platform bus each point numbering and coordinate
5. an application process for bulb forward type tubular pump water inlet flow channel, is characterized in that, comprise the following steps:
(1) described bulb forward type tubular pump water inlet flow channel is divided into linear inducer, bulb to cross stream section and bottleneck round platform rectification section 3 sections along water (flow) direction order；The described bulb forward type each physical dimension of tubular pump water inlet flow channel is all in order to impeller diameter D0Relative value for benchmark represents；Linear inducer is positioned at the front portion of bulb forward type tubular pump water inlet flow channel, and linear inducer effect is to adapt to the needs of pump house superstructure layout and current are carried out preliminary rectification；Arranging middle dividing pier in the middle part of linear inducer, the inwall shape line of linear inducer water inlet flow channel is straight line；The length L of linear inducer water inlet flow channelInducer=2.183D0, admission section height HInducer import=1.887D0, admission section width BInducer import=2.467D0, Outlet Section height HInducer exports=1.714D0, Outlet Section width BInducer exports=2.130D0, import top board arc radius RTop board=1m, the length L of middle dividing pierDividing pier=2.183D0, thickness BDividing pier=0.8m, head arc radius RDividing pier head=0.4m, afterbody arc radius RDividing pier afterbody=0.4m；
Bulb is crossed after stream section is positioned at linear inducer, is used for placing bulb and appurtenance thereof and current being adjusted further；Bulb is crossed the bulb of stream section and is made up of bowl-type rotary body and cylinder, arranges into manhole on described cylindrical top, and described cylindrical bottom arranges two parallel bulbs and supports；Bulb is crossed the inwall shape line of stream section water inlet flow channel and is adopted cross section place figure and tables of data to represent, tables of data includes runner vertical section upper sideline coordinate (XUpper i, YUpper i), lower sideline coordinate (XLower i, YLower i), profile height Hi, section width Bi, transitional radius Ri, each section numbering i and data are listed in table 5；Each point numbering j and the coordinate of described bowl-type rotary body bus are listed in table 6；Described cylindrical length LCylinder=1.131D0, cross section diameter DCylinder=0.926D0；Entering manhole is streamlined cylinder, enters the length L of manholeEnter manhole=1.131D0, width BEnter manhole=0.8m, head arc radius Rr1=0.4m, afterbody arc radius Rr2=1.0m；Bulb is supported for elongated streamline cylinder, the length L that bulb supportsSupport=1.375D0, width BSupport=0.1D0, head arc radius Rc1=0.05D0, afterbody arc radius Rc2=0.476D0；
Table 5 bulb crosses stream section runner profile data table
Table 6 bowl-type rotary body bus each point numbering and coordinate
Bottleneck round platform rectification section is positioned at after bulb crosses stream section, for current are carried out final rectification, with ensure uniform fluid flow straight enter water pump vane room；Bottleneck round platform rectification section water inlet flow channel body is bottleneck round platform, sets the bulb bottleneck round platform being connected with described cylinder afterbody in water inlet flow channel bottleneck round platform；The length L of bottleneck round platform rectification sectionRectification section=1.251D0, the inlet diameter D of water inlet flow channel bottleneck round platformRunner round platform importWith outlet diameter DRunner round platform exportsRespectively 1.714D0And 0.984D0, the inlet diameter D of bulb bottleneck round platformBulb round platform importWith outlet diameter DBulb round platform exportsRespectively 0.926D0And 0.354D0；Each point numbering k and the coordinate of the bus of water inlet flow channel bottleneck round platform and the bus of bulb bottleneck round platform are listed in table 7 and table 8 respectively；
Table 7 water inlet flow channel bottleneck round platform bus each point numbering and coordinate
Table 8 bulb bottleneck round platform bus each point numbering and coordinate
The three-dimensional body flow-passing surface of described bulb forward type tubular pump water inlet flow channel by the inwall of water inlet flow channel and middle dividing pier, bowl-type rotary body, cylinder, enter manhole, bulb supports, the outer wall of bulb bottleneck round platform is constituted；
(2) the length L of described bulb forward type tubular pump water inlet flow channel linear inducerInducerWith admission section width BInducer importRespectively 2.183D0With for 2.467D0, both of which can needing minimizing on this basis or increasing according to pump house arrangement；
(3) described cylindrical length LCylinderWith diameter DCylinderRespectively 1.131D0And 0.926D0, the requirement that both of which can be arranged according to described cylinder in-vivo device on this basis suitably reduces or increases；
(4) described cylindrical length LCylinderChange into L 'CylinderAfter, described bulb crosses the length L of stream sectionCross the section of streamChange into therewith
L′Cross the section of stream=L 'Cylinder+0.596D0
In formula, L 'Cross the section of streamRepresent that the bulb after adjusting crosses the length of stream section, L 'CylinderRepresent the cylindrical length after adjusting；
(5) described cylindrical diameter DCylinderChange into D 'CylinderAfter, the bus of described bowl-type rotary body and bulb bottleneck round platform is both needed to be adjusted accordingly；
(6) relative value of the described bulb forward type each physical dimension of tubular pump water inlet flow channel is multiplied by the water pump vane diameter D that pumping plant is intended adopting0Size needed for this pumping plant water inlet flow channel, unit is m；
(7) according to the bulb forward type each geometric parameter of tubular pump water inlet flow channel after calculating and adjusting, its line chart is drawn.
6. the application process of a kind of bulb forward type tubular pump water inlet flow channel according to claim 5, is characterized in that, the Adjustable calculation formula of described bowl-type rotary body bus is as follows:
X′j=Xj
In formula, XjAnd YjThe respectively coordinate of described bowl-type rotary body bus jth point X-direction and Y-direction, (j=1,2 ..., 11)；X 'jWith Y 'jBowl-type rotary body bus jth point X-direction after respectively adjusting and the coordinate of Y-direction, (j=1,2 ..., 11)；DCylinderWith D 'CylinderDiameter before respectively described cylinder adjusts and after adjustment.
7. the application process of a kind of bulb forward type tubular pump water inlet flow channel according to claim 5, is characterized in that, the Adjustable calculation formula of described bulb bottleneck round platform bus is as follows:
X′k=Xk
In formula, XkAnd YkThe respectively coordinate of described bulb bottleneck round platform bus kth point X-direction and Y-direction, (k=1,2 ..., 11)；X 'kWith Y 'kBulb bottleneck round platform bus kth point X-direction after respectively adjusting and the coordinate of Y-direction, (k=1,2 ..., 11)；DCylinderWith D 'CylinderDiameter before respectively described cylinder adjusts and after adjustment.
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| US4780052A (en) * | 1986-09-02 | 1988-10-25 | Compagnie General Des Matieres Nucleaires | Rotary blower with guide sleeve |
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| CN202091206U (en) * | 2011-06-08 | 2011-12-28 | 扬州大学 | Combined type tubular pump device of water outlet structure |
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