Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a water and fertilizer integrated system and a fertilizing pump thereof, wherein concave-convex parts have the effects of inhibiting the thickness of boundary layers and reducing flow separation, the design of a first flow dividing blade and a second flow dividing blade can reduce turbulence in an impeller runner, the design of a communication hole can balance/adjust the pressure distribution at two sides of a flow dividing disc, the pressure fluctuation of the fertilizing pump/centrifugal pump can be reduced, the pressure and flow output stability of the fertilizing pump can be improved, thereby ensuring the stable supply of fertilizer or water, and the system has the advantages of accurate fertilization and irrigation.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a fertilization pump of liquid manure integration system, fertilization pump is the centrifugal pump, the centrifugal pump includes impeller, spiral case, the impeller is installed in the spiral case, the impeller includes the front shroud, the back shroud, the blade, the import ring, the flow distribution plate, a plurality of blades are distributed along circumference and connect between front shroud and back shroud, the entrance point of front shroud has the import ring, be provided with the flow distribution plate between front shroud and the back shroud, the blade includes first blade, the second blade, a plurality of first blades, the second blade sets up along circumference interval, first blade and the radial length of second blade are unequal and the leading edge of first blade is located the radial inboard of second blade leading edge; the method is characterized in that: the radial length of the flow distribution disc is approximately equal to that of the second blades, the flow distribution disc comprises a first concave-convex part and a second concave-convex part, the first concave-convex part is arranged on one side face, close to the front cover plate, of the flow distribution disc, the second concave-convex part is arranged on one side face, close to the rear cover plate, of the flow distribution disc, the first concave-convex part is wavy and the surge direction of waves is radial, the first concave-convex part is arranged between the first blades and the second blades which are circumferentially and adjacent, the second concave-convex part is wavy and the surge direction of waves is radial, and the second concave-convex part is arranged between the first blades and the second blades which are circumferentially and adjacent.
Further, the first blade and the second blade are arc-shaped blades, the inner diameter of the second blade is substantially equal to the inner diameter of the flow distribution disc or the error is within 5%, and the outer diameter of the second blade is substantially equal to the outer diameter of the flow distribution disc; the first concave-convex part and the second concave-convex part have the same structure.
Further, a side face of the rear cover plate, which is close to the flow distribution disc, is provided with a first flow distribution blade, a plurality of first flow distribution blades are distributed along the circumferential direction, the inner diameter of each first flow distribution blade is larger than the inner diameter of the flow distribution disc, and the outer diameter of each first flow distribution blade is smaller than the outer diameter of the flow distribution disc.
Further, a side face of the front cover plate, which is close to the flow distribution disc, is provided with a plurality of second flow distribution blades, the second flow distribution blades are distributed along the circumferential direction, the inner diameter of each second flow distribution blade is larger than the outer diameter of each first flow distribution blade, and the outer diameter is equal to the outer diameter of the flow distribution disc.
Further, the diverter disc is provided with a plurality of communicating holes, the communicating holes are distributed along the circumferential direction, and in the radial direction, the positions of the communicating holes are located between the first diverter blade and the second diverter blade.
Further, the communication hole is obliquely arranged, the rear edge end of the first flow dividing blade is approximately positioned on the axis of the communication hole, and the front edge end of the second flow dividing blade is approximately positioned on the axis of the communication hole.
Further, the axial height H of the impeller runner is arranged between the front cover plate and the rear cover plate, the flow distribution disc is provided with an axial thickness H1, the axial height H1 is arranged between the flow distribution disc and the rear cover plate, the axial height H2 is arranged between the flow distribution disc and the front cover plate, the H1+ H2+ H1 = H, the H2 is more than H1, the H2 = (0.45-0.7) H, and the H1 = (0.25-0.45) H.
Further, the first concave-convex portion (51) and the second concave-convex portion (52) are identical in structure, but different in wave crest and wave width dimensions to adapt to different axial heights H1, H2.
Further, the first or second splitter vane has an axial height h2, h2 < h1, and h2= (0.25-0.55) h1; in the radial direction, the radial length L1 is between the trailing edge end of the first splitter blade and the leading edge end of the second splitter blade, the second splitter blade has a radial length L2, L2 < L1, and l2= (0.7-0.95) L1.
The utility model provides a liquid manure integration system, it includes water supply installation, fertilizer supply installation, controlling means, water supply installation is including the water source that loops through the pipeline connection, the water pump, the one-level filter, the secondary filter, fertilizer supply installation is including the storage device that loops through the pipeline connection, the fertilization pump, the storage device includes a plurality of fertilizer barrels, form the irrigation main line after the downstream pipeline of fertilization pump and the downstream pipeline of secondary filter meet, a plurality of irrigation branch lines are branched into to the downstream of irrigation main line, a plurality of irrigation branch lines extend to the sprinkling irrigation district respectively, the district is irrigated in the drip irrigation, sprinkling irrigation district is provided with a plurality of shower nozzles, the district is irrigated in the micro-spray and is provided with a plurality of micro-shower nozzles, drip irrigation district is provided with a plurality of drip emitters, be connected with the control valve on one section or more sections pipeline, the manometer and/or flowmeter.
According to the water and fertilizer integrated system and the fertilizing pump thereof, the concave-convex part has the effects of inhibiting the thickness of the boundary layer and reducing flow separation, the first flow dividing blades and the second flow dividing blades can be designed to reduce turbulence in the impeller flow channels, the pressure distribution at two sides of the flow dividing disc can be balanced/regulated through the design of the communicating holes, the pressure fluctuation of the fertilizing pump/centrifugal pump can be reduced, the pressure and flow output stability of the fertilizing pump can be improved, and therefore stable supply of fertilizer or water can be guaranteed, and the water integrated system has the advantages of accurate fertilization and irrigation.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the integrated system for water and fertilizer according to the prior art/the present invention comprises a water supply device, a fertilizer supply device and a control device, wherein the water supply device comprises a water source, a water pump, a primary filter and a secondary filter which are sequentially connected through pipelines, the fertilizer supply device comprises a fertilizer storage device and a fertilizer pump which are sequentially connected through pipelines, the fertilizer storage device comprises a plurality of fertilizer barrels, the downstream pipeline of the fertilizer pump and the downstream pipeline of the secondary filter are converged to form an irrigation main pipeline, the downstream of the irrigation main pipeline is branched into a plurality of irrigation branch pipelines, the irrigation branch pipelines respectively extend to a sprinkling irrigation area, a micro-sprinkling irrigation area and a drip irrigation area, the sprinkling irrigation area is provided with a plurality of spray heads, the micro-sprinkling irrigation area is provided with a plurality of drip emitters, and one or more sections of the pipelines are connected with control valves, pressure gauges and/or flowmeters.
As shown in fig. 2-3, the fertilizing pump in the prior art/the invention is a centrifugal pump, the centrifugal pump comprises an impeller and a volute, the impeller is arranged in the volute, the impeller comprises a front cover plate 1, a rear cover plate 2, blades 3, an inlet ring 4 and a flow dividing disc 5, the blades 3 are circumferentially distributed and connected between the front cover plate 1 and the rear cover plate 2, the inlet end of the front cover plate 1 is provided with the inlet ring 4, the flow dividing disc 5 is arranged between the front cover plate 1 and the rear cover plate 2, the flow dividing disc 5 is connected with the blades 3, and the flow dividing disc 5 is positioned at the approximate middle position between the front cover plate 1 and the rear cover plate 2.
As shown in fig. 4-5, the fertilization pump of the water and fertilizer integrated system is a centrifugal pump, the centrifugal pump comprises an impeller and a volute, the impeller is arranged in the volute and comprises a front cover plate 1, a rear cover plate 2, blades 3, an inlet ring 4 and a flow dividing disc 5, the blades 3 are circumferentially distributed and connected between the front cover plate 1 and the rear cover plate 2, the inlet ring 4 is arranged at the inlet end of the front cover plate 1, the flow dividing disc 5 is arranged between the front cover plate 1 and the rear cover plate 2, the blades 3 comprise a first blade 31 and a second blade 32, the first blade 31 and the second blade 32 are circumferentially arranged at intervals, the radial lengths of the first blade 31 and the second blade 32 are unequal, and the front edge of the first blade 31 is located at the radial inner side of the front edge 33 of the second blade 32; the radial length of the diverter disc 5 is approximately equal to that of the second blades 32, the diverter disc 5 comprises a first concave-convex portion 51 and a second concave-convex portion 52, the first concave-convex portion 51 is arranged on one side face, close to the front cover plate 1, of the diverter disc 5, the second concave-convex portion 52 is arranged on one side face, close to the rear cover plate 2, of the diverter disc 5, the first concave-convex portion 51 is wavy and the surge direction of waves is radial, the first concave-convex portion 51 is arranged circumferentially and between the adjacent first blades 31 and second blades 32, the second concave-convex portion 52 is wavy and the surge direction of waves is radial, and the second concave-convex portion 52 is circumferentially and between the adjacent first blades 31 and second blades 32.
The first and second blades 31, 32 are arc-shaped blades, the inner diameter of the second blade 32 is substantially equal to or within 5% of the inner diameter of the diverter tray 5, and the outer diameter of the second blade 32 is substantially equal to the outer diameter of the diverter tray 5.
According to the fertilizing pump of the water-fertilizer integrated system, through the improved design of the flow distribution disc 5, the concave-convex part has the effects of inhibiting the thickness of the boundary layer and reducing flow separation, so that the pressure fluctuation of the fertilizing pump/centrifugal pump can be reduced, the pressure and flow output stability of the fertilizing pump can be improved, stable supply of fertilizer or water can be ensured, and the advantages of accurate fertilization and irrigation are achieved.
Further, a side face of the back cover plate 2, which is close to the diverter disc 5, is provided with first diverter blades 6, a plurality of first diverter blades 6 are distributed along the circumferential direction, the inner diameter of each first diverter blade 6 is larger than the inner diameter of the diverter disc 5, and the outer diameter is smaller than the outer diameter of the diverter disc 5.
A side surface of the front cover plate 1, which is close to the splitter plate 5, is provided with a second splitter blade 7, a plurality of second splitter blades 7 are distributed along the circumferential direction, the inner diameter of the second splitter blade 7 is larger than the outer diameter of the first splitter blade 6, and the outer diameter is equal to the outer diameter of the splitter plate 5.
According to the invention, through the design of the first flow dividing blade 6 and the second flow dividing blade 7, turbulence in the impeller flow channel can be reduced, pressure fluctuation of the fertilizing pump/centrifugal pump can be further reduced, and pressure and flow output stability of the fertilizing pump can be improved, so that stable supply of fertilizer or water can be ensured, and the device has the advantages of accurate fertilization and irrigation.
Further, the flow dividing disk 5 is provided with communication holes 53, and the plurality of communication holes 53 are distributed in the circumferential direction, and in the radial direction, the positions of the communication holes 53 are located between the first flow dividing vane 6 and the second flow dividing vane 7. The communication hole 53 is inclined, and the trailing edge of the first splitter vane 6 is located substantially on the axis of the communication hole 53, and the leading edge of the second splitter vane 7 is located substantially on the axis of the communication hole 53 (as shown in fig. 4 to 5). The invention can balance/adjust the pressure distribution at two sides of the flow dividing disc 5 by the design of the communication hole 53, thereby further reducing the pressure fluctuation of the fertilizing pump and improving the pressure and flow output stability of the fertilizing pump.
Further, an axial height H of the impeller runner is arranged between the front cover plate 1 and the rear cover plate 2, the flow distribution disc 5 is provided with an axial thickness H1, an axial height H1 is arranged between the flow distribution disc 5 and the rear cover plate 2, an axial height H2 is arranged between the flow distribution disc 5 and the front cover plate 1, h1+h2+h1=h, and H2 is larger than H1; preferably, h2= (0.5-0.6) H, such as 0.55; h1 = (0.3-0.4) H, such as 0.35.
The first concave-convex 51 and the second concave-convex 52 have the same structure, but different wave crest and wave width sizes to adapt to different axial heights H1, H2.
The first splitter vane 6 or the second splitter vane 7 has an axial height h2, h2 < h1, and h2= (0.3-0.5) h1, such as 0.4.
In the radial direction, the trailing edge of the first splitter blade 6 and the leading edge of the second splitter blade 7 have a radial length L1 therebetween, the second splitter blade 7 has a radial length L2, L2 < L1, and l2= (0.8-0.95) L1, such as 0.85-0.9.
According to the invention, through the concrete optimization design of the flow dividing disc 5, the first flow dividing blades 6 and the second flow dividing blades 7, the pressure fluctuation of the fertilizing pump/centrifugal pump can be further reduced, the pressure and flow output stability of the fertilizing pump can be improved, so that the stable supply of fertilizer or water can be ensured, and the advantages of accurate fertilization and irrigation are realized.
According to the water and fertilizer integrated system and the fertilizing pump thereof, the concave-convex part has the effects of inhibiting the thickness of the boundary layer and reducing flow separation, the first flow dividing blades and the second flow dividing blades can be designed to reduce turbulence in the impeller flow channels, the pressure distribution at two sides of the flow dividing disc can be balanced/regulated through the design of the communicating holes, the pressure fluctuation of the fertilizing pump/centrifugal pump can be reduced, the pressure and flow output stability of the fertilizing pump can be improved, and therefore stable supply of fertilizer or water can be guaranteed, and the water integrated system has the advantages of accurate fertilization and irrigation.
It should be noted that, in the embodiments of the present invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship, movement situation, etc. between the components in a specific posture (as shown in the drawings), if the specific posture changes, the directional indicators correspondingly change, where the "connection" may be a direct connection or an indirect connection, and the "setting", "setting" may be a direct setting or an indirect setting.
The above-described embodiments are illustrative of the present invention and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.