CN116220987B - Reel type sprinkler integrated speed-adjustable water turbine and speed adjusting method thereof - Google Patents
Reel type sprinkler integrated speed-adjustable water turbine and speed adjusting method thereof Download PDFInfo
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- CN116220987B CN116220987B CN202310507238.2A CN202310507238A CN116220987B CN 116220987 B CN116220987 B CN 116220987B CN 202310507238 A CN202310507238 A CN 202310507238A CN 116220987 B CN116220987 B CN 116220987B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000009467 reduction Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 51
- 238000011084 recovery Methods 0.000 claims description 35
- 230000002262 irrigation Effects 0.000 claims description 20
- 238000003973 irrigation Methods 0.000 claims description 20
- 230000014509 gene expression Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000008447 perception Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 14
- 239000007788 liquid Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 238000004064 recycling Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 230000001151 other effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4481—Arrangements or adaptations for driving the reel or the material
- B65H75/4489—Fluid motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
- F03B15/08—Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/02—Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/121—Blades, their form or construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
Abstract
The invention provides an integrated speed-adjustable water turbine of a reel type sprinkler and a speed adjusting method thereof, wherein the integrated speed-adjustable water turbine comprises an integrated water inlet and outlet front cover plate structure, a water turbine and a reduction gearbox shell; the front water inlet and outlet cover plate structure is provided with a fan-shaped speed regulator, and the fan-shaped speed regulator is connected with the water inlet end of the front water inlet and outlet cover plate structure; the water inlet and outlet front cover plate structure is rotationally connected with a water turbine, and the water turbine is provided with S-shaped blades; the hydrodynamic turbine is connected with a driving shaft which is connected with the reduction gearbox shell, and the water inlet and outlet front cover plate structure is connected with the reduction gearbox shell in a sealing way. According to the invention, by arranging the integrated water inlet and outlet front cover plate structure with the fan-shaped speed regulator, the effects of improving the speed regulation precision of the hydrodynamic turbine and facilitating the processing are achieved; by arranging the S-shaped long and short blade water turbine, the effects of reducing hydraulic loss, improving efficiency and expanding a high-efficiency area are achieved; by arranging the gearbox shell with the rear cover plate, the effects of saving labor and materials, reducing energy consumption and simplifying the installation procedure are achieved.
Description
Technical Field
The invention belongs to the technical field of hydraulic machinery, and particularly relates to an integrated speed-adjustable water turbine of a reel type sprinkler and a speed adjusting method thereof.
Background
The reel type sprinkler is an irrigation machine which winds a traction PE pipe on a reel, drives the reel to rotate through a power system and a transmission system, and pulls a sprinkler head to move and spray automatically. The reel type sprinkler is flexible in maneuvering, convenient to maintain, suitable for large, medium and small land scales, is important agricultural irrigation equipment in China, and is the fastest growing sprinkler type in the last decade. The power system of the reel type sprinkler at home and abroad is driven by a water turbine, the water turbine is impacted by the pressure water of the sprinkler to rotate, then the reel is driven to rotate by a speed changing device to drive the PE pipe to recycle, when the number of recycled PE pipes changes, the recycling speed can be increased along with the increase of the number of layers, the PE pipe cannot be kept at a constant recycling speed, the sprinkler is uneven, the irrigation uniformity of the reel type sprinkler is affected, and therefore, a speed regulating device is required to regulate the flow of the water turbine in real time to keep the recycling speed constant, and the performance of the whole sprinkler is ensured.
The technical problem to be solved by the invention is different from that of a water turbine, the running system of the water turbine is pressureless, and only the inlet energy is converted as much as possible, but the hydraulic turbine of the invention runs under the pressurized system, so that the energy conversion requirement is met, and the back pressure requirement of the system is met.
The existing water turbine blade flow channels have obvious rotational flow obstruction flow, obvious flow channel blockage and larger impact loss at the outlet, and obvious gap leakage flow exists in larger radial and axial gaps, so that leakage vortex is generated, and larger hydraulic loss and lower efficiency of the water turbine are caused. The existing water turbine is not provided with a speed regulating device or provided with an in-line speed regulator, and has the advantages of low regulating precision, loose structure and labor and material consumption. The existing branch pipeline structure and transmission system structure at the inlet of the water turbine are complex, so that more energy loss can be generated, and labor and material are wasted.
Disclosure of Invention
Aiming at the technical problems, the invention provides an integrated speed-adjustable water turbine of a reel type sprinkler and a speed adjusting method thereof, and the integrated water inlet and outlet front cover plate structure with a fan-shaped speed adjuster is arranged, so that the effects of improving the speed adjusting precision of the water turbine and being convenient and fast to process are achieved; by arranging the S-shaped long and short blade water turbine, the effects of reducing hydraulic loss, improving efficiency and expanding a high-efficiency area are achieved; by arranging the gearbox shell with the rear cover plate, the effects of saving labor and materials, reducing energy consumption and simplifying the installation procedure are achieved.
Note that the description of these objects does not prevent the existence of other objects. Other objects than the above objects can be extracted from the description of the specification, drawings, and claims.
The present invention achieves the above technical object by the following means.
An integrated speed-adjustable water turbine of a reel type sprinkler comprises an integrated water inlet and outlet front cover plate structure, a water turbine and a reduction gearbox shell;
the water inlet and outlet front cover plate structure is provided with a fan-shaped speed regulator, and the fan-shaped speed regulator is connected with the water inlet end of the water inlet and outlet front cover plate structure; the water inlet and outlet front cover plate structure is rotationally connected with a water turbine, and the water turbine is provided with S-shaped blades; the water turbine is connected with a driving shaft, the driving shaft is connected to the reduction gearbox shell, and the water inlet and outlet front cover plate structure is connected with the reduction gearbox shell in a sealing mode.
In the above scheme, the water inlet end of business turn over water front shroud structure is equipped with inlet channel one and inlet channel two, the water outlet end of business turn over water front shroud structure is equipped with out the water channel, inlet channel one and inlet channel two are located the tangential position of water turbine, inlet channel two is connected with the nozzle, outlet channel is located water turbine axial position.
Further, the first water inlet channel is connected with a circular concealed speed regulating plate, the circular concealed speed regulating plate comprises a circular plate, the circular plate is arranged on a rotating shaft, one end of the rotating shaft is connected with a fan-shaped speed regulator, the upper end of the fan-shaped speed regulator is provided with a speed regulating handle, the fan-shaped speed regulator is provided with a plurality of gear holes, the gear holes are used for connecting gear control nuts, the gear control nuts are connected with speed regulating pull rods, the speed regulating pull rods are connected with connecting rods, the connecting rods are connected with one end of a tensioning spring, the other end of the tensioning spring is used for being connected to a stand of a sprinkler, the speed regulating pull rods are connected with PE pipe layer number sensing cross rods, and the PE pipe layer number sensing cross rods are used for being pressed on PE pipes on the outermost layers of the reel.
In the scheme, the S-shaped long and short blades of the water turbine are provided with the S-shaped blades and the hub, the S-shaped blades are arranged on the hub at intervals, and the S-shaped blades are cylindrical blades which are distributed evenly along the circumference and are the S-shaped long blades and the S-shaped short blades.
Further, the radial clearance between the S-shaped long blades and the S-shaped short blades is less than 1.5% of the diameter of the water turbine; the S-shaped blades are all of unequal heights, the heights of the S-shaped blades are continuously reduced from the center of the blades to the edges of the blades, so that the axial clearance between the tops of the S-shaped blades and the water inlet and outlet front cover plate structure is kept uniform, and the clearance height is smaller than 15% of the maximum blade height.
In the scheme, the reduction gearbox shell is provided with a rear cover plate.
Further, the central area of the rear cover plate surface is a conical surface, the hub is a concave conical surface, and the outlet end of the hub is connected with a bullet type locking nut; the water outlet channel is a variable-section bent pipe water outlet channel, and the diameter of the water outlet channel is gradually increased from the front end to the tail end and then is kept unchanged.
In the above scheme, the S-shaped blade profile is of an S shape and comprises a front C-shaped section and a rear C-shaped section along the flow direction, the front C-shaped concave surface and the rear C-shaped concave surface are opposite in direction, the front C-shaped section and the rotating wheel are the same in rotation direction, and the rear C-shaped section and the rotating wheel are opposite in rotation direction; the blade profile curves of the S-shaped long blade and the S-shaped short blade are fitted under a rectangular coordinate system with an outlet point as an origin and a radius of an x axis, and the fitted expressions are respectively as follows:
long blade:
short leaves:
wherein ,L1 、L 2 The projection lengths of the long-blade profile curve and the short-blade profile curve in the radial direction are respectively.
In the above scheme, the gear holes of the sector speed regulator have the same size and diameter d, the gear holes are distributed in n rows in a staggered manner, n is more than or equal to 2, each row is provided with a plurality of gear holes, the distance between each row of gear holes is d, and the radial distance from the first gear hole of the 1 st row to the nth row to the center point of the sector is sequentially reduced, namely r 11 ＞r 21 ＞…＞r n1 And the first gear of the 1 st row and the nth row is radially separated by d, namely r 11 -r n1 The radial distance d/(n-1) between the first two adjacent rows of gears, i.e. r 11 -r n1 =d, where r 11 Represents that the 1 st row of gear holes are separated from the center point of the fan shapeR is the radial distance of 21 The radial distance between the row 1 gear hole of the 2 nd column and the circle center point of the fan shape is shown; r is (r) n1 The radial distance between the nth row of 1 st gear holes and the center point of the fan shape is shown; r is (r) n 、r n-1 The radial distance between the gear holes in the nth row and the n-1 th row with the same line number and the center point of the fan shape is respectively shown.
The speed regulating method of the integrated speed-adjustable water turbine of the reel type sprinkler comprises the following steps of:
1) Before sprinkling irrigation operation, a gear hole is initially selected on the fan-shaped speed regulator and is locked by a gear control nut;
2) Adjusting the sprinkling irrigation operation, measuring the current recovery speed, and if the current recovery speed is inconsistent with the set recovery speed, stirring a speed regulation handle for adjustment;
3) Repeating the steps until the current recovery speed reaches the set recovery speed, and selecting the current gear hole to start sprinkling irrigation operation if the rotation amplitude of the speed regulating handle is minimum;
4) After the sprinkling irrigation operation is started, when the PE pipe layer is changed, if the recovery speed is inconsistent with the set speed, the speed regulating handle is stirred for further adjustment, so that the recovery speed of the PE pipe is stabilized at the set speed value.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the S-shaped long and short blades are arranged, so that the hydraulic loss of the blade flow channels is obviously reduced, S-shaped short blades are arranged between adjacent S-shaped long blade flow channels, and the internal flow is improved, wherein the S-shaped short blades mainly have the flow dividing function, and the functions of increasing the flow channel overflow capacity, improving the efficiency and expanding the high-efficiency area are realized.
2. According to the invention, through the concave conical surface hub and the bullet type locking nut arranged in the outlet area of the water turbine and matched with the variable cross-section elbow water outlet channel, the flow loss of the outlet can be obviously reduced, and the efficiency is improved.
3. The invention has the advantages of convenient and quick adjustment, small resistance loss, reduced pressure when fluid passes through, high-frequency use, compact structure and labor and material saving in the processing process by arranging the circular concealed speed regulating plate.
4. The fan-shaped speed regulator is arranged, so that the structure is compact, and labor and materials are saved in the processing process.
5. According to the invention, the gear holes are arranged in a staggered manner according to the rows, so that the adjusting range is wider, the adjusting precision is higher, and the sprinkling uniformity is improved.
6. According to the invention, by arranging the integrated water inlet and outlet front cover plate structure, labor and materials are saved, the energy consumption is reduced, and the efficiency is improved.
7. The invention simplifies the installation procedure by arranging the reduction gearbox shell structure with the rear cover plate, thereby saving labor and materials.
Note that the description of these effects does not hinder the existence of other effects. Effects other than the above are obvious and can be extracted from the description of the specification, drawings, claims, and the like.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection part of the invention with the reel;
FIG. 3 is a schematic view of a fan-shaped governor and a connection structure thereof according to the present invention;
FIG. 4 is a schematic view of the gear holes and the mutual positions of the gear holes according to the present invention;
FIG. 5 illustrates a prior art C-vane impeller mid-section pressure gradient;
FIG. 6 illustrates the pressure gradient across the middle section of an S-shaped long and short vane impeller of the present invention;
FIG. 7 shows the streamline distribution of the middle section of an impeller under the working condition of small flow of the prior C-shaped blade;
FIG. 8 shows the streamline distribution of the middle section of the impeller under the working condition of small flow of the S-shaped long and short blades;
FIG. 9 shows the streamline distribution of the middle section of the impeller under the rated working condition of the prior C-shaped blade;
FIG. 10 shows the streamline distribution of the middle section of the impeller under the rated working condition of the S-shaped long and short blades;
FIG. 11 shows the streamline distribution of the middle section of an impeller under the large-flow condition of the prior C-shaped blade;
FIG. 12 shows the streamline distribution of the middle section of the impeller under the high-flow working condition of the S-shaped long and short blades;
FIG. 13 is a graph of the circumferential velocity profile of the exit face of the impeller under the nominal operating conditions of a conventional C-type blade;
FIG. 14 shows the circumferential velocity distribution of the outlet face of the impeller under the rated working condition of the S-shaped long and short blades of the invention;
FIG. 15 is a schematic view of an S-shaped long and short blade water turbine according to the present invention;
FIG. 16 is a cross-sectional view of an S-shaped long and short blade water turbine of the present invention.
In the figure: 1. a front cover plate structure for water inlet and outlet; 11. a first water inlet channel; 12. a water inlet channel II; 13. a nozzle; 14. a water outlet channel; 15. a circular concealed speed regulation plate; 16. a fan-shaped speed regulator; 17. a gear hole; 18. a gear control nut; 19. a speed regulating handle; 110. a speed regulating pull rod; 111. a connecting rod; 112. tensioning the spring; 113. PE tube layer number sensing cross bars; 2. a water turbine; 21. bullet type lock nut; 22. s-shaped blades; 23. a hub; 3. a reduction gearbox housing; 31. a drive shaft.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "front", "rear", "left", "right", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Fig. 1 illustrates a best embodiment of an integrated speed-adjustable water turbine for a reel-type sprinkler, which comprises an integrated water inlet and outlet front cover plate structure 1, a water turbine 2 and a reduction gearbox housing 3; the front water inlet and outlet cover plate structure 1 is provided with a fan-shaped speed regulator 16, and the fan-shaped speed regulator 16 is connected with the water inlet end of the front water inlet and outlet cover plate structure 1; the water inlet and outlet front cover plate structure 1 is rotatably connected with a water turbine 2, and the water turbine 2 is provided with S-shaped blades 22; the water turbine 2 is connected with a driving shaft 31, the driving shaft 31 is connected to the reduction gearbox shell 3, and the water inlet and outlet front cover plate structure 1 is in sealing connection with the reduction gearbox shell 3.
The water inlet end of the water inlet and outlet front cover plate structure 1 is provided with a water inlet channel I11 and a water inlet channel II 12, the water outlet end of the water inlet and outlet front cover plate structure 1 is provided with a water outlet channel 14, the water inlet channel I11 and the water inlet channel II 12 are positioned at the tangential position of the water turbine 2, the water inlet channel II 12 is connected with a nozzle 13, and the water outlet channel 14 of the variable cross-section elbow is positioned at the axial position of the water turbine 2.
The diameter of the outlet channel 14 of the variable cross-section elbow pipe is gradually increased from the front end to the tail end and then is kept unchanged.
The reduction gearbox shell 3 is provided with a rear cover plate, and the center of the rear cover plate surface of the reduction gearbox shell 3 with the rear cover plate is a conical surface.
Referring to fig. 1, pressurized water flows into a water inlet channel of a water turbine 2 through a water supply pipeline, one part flows into a first water inlet channel 11, the other part flows into a second water inlet channel 12, the pressurized water flowing into the second water inlet channel 12 enters a water turbine chamber through a nozzle, and impacts an S-shaped blade 22 to drive the water turbine 2 to rotate, the water turbine 2 is positioned in the turbine chamber, the turbine chamber is formed by sealing an integrated water inlet and outlet front cover plate structure 1 and a gearbox shell 3 with a rear cover plate, the water turbine 2 is connected with a gearbox output power through a driving shaft 31, and then a reel type sprinkler reel is driven to rotate to recycle a PE pipe. The pressurized water flowing in from the first water inlet channel 11 and the second water inlet channel 12 finally flows into the variable-section bent pipe water outlet channel 14, flows through the PE pipe, and is sprayed out by a spray head vehicle at the terminal end of the PE pipe for crop irrigation.
Referring to fig. 1, the integrated water inlet and outlet front cover plate structure 1 reduces the number of the flow passing components of the inlet part, reduces the hydraulic loss possibly generated by the flow passing components, and improves the hydraulic performance of the water turbine 2 to the maximum extent. The gearbox shell 3 with the rear cover plate reduces the installation procedures of the water turbine 2 and the gearbox, so that the structure is compact, and the labor and the materials are saved in the processing process. The conical surface of the central area of the rear cover plate surface of the reduction gearbox shell 3 with the rear cover plate can be better matched with the molded line of the wheel hub 23, so that the dead water area of the back surface of the wheel in the turbine chamber is reduced as much as possible, the hydraulic loss is reduced, and the efficiency of the water turbine is improved.
Referring to fig. 1, the variable cross-section elbow water outlet channel 14 is used for recovering part of kinetic energy of the water flow at the outlet of the runner, the diameter of the variable cross-section elbow water outlet channel is gradually increased from the front end to the tail end and then is kept unchanged, and compared with the existing cylindrical draft tube, the straight cone section with the gradually increased front diameter has stronger kinetic energy recovery capability, is more beneficial to recovering pressure, reducing kinetic energy loss at the outlet of the runner, and further utilizes the energy of the water flow. The flow velocity at the outlet of the runner is reduced by the diffusion effect of the straight cone-shaped outlet section, and v is set at the outlet velocity starting from the straight cone section 2 V to the end of the straight cone 5 Then make most ofPart of energy, the rotorThe kinetic energy loss of the outlet is also determined byReduced to +.>
According to one embodiment of the present invention, preferably, the first water inlet channel 11 is connected with a circular built-in speed regulation plate 15, the circular built-in speed regulation plate 15 includes a circular plate, the circular plate is installed on a rotating shaft, one end of the rotating shaft is connected with a fan-shaped speed regulator 16, a speed regulation handle 19 is arranged at the upper end of the fan-shaped speed regulator 16, the fan-shaped speed regulator 16 is provided with a plurality of gear holes 17, the gear holes 17 are connected with a gear control nut 18, the gear control nut 18 is connected with a speed regulation pull rod 110, the speed regulation pull rod 110 is connected with a connecting rod 111, the connecting rod 111 is connected with one end of a tension spring 112, the other end of the tension spring 112 is connected to a sprinkler frame, the speed regulation pull rod 110 is connected with a PE pipe layer number sensing cross rod 113, and the PE pipe layer number sensing cross rod 113 is used for being pressed on an outermost PE pipe of the reel.
Referring to fig. 2 and 3, when the reel type sprinkler is used for sprinkling irrigation, the PE pipe is continuously recycled, the number of coiled layers is increased, the coiled radius R of the PE pipe is increased, the recycling speed V (v=ωr) is increased, the amount of sprinkling water passing through the land is reduced due to the increased recycling speed, the sprinkling uniformity is affected, and the irrigation quality is reduced. Therefore, it is desirable to reduce the PE pipe recovery rate and stabilize it at a set point to improve sprinkler uniformity. The reel rotation speed needs to be reduced when the recovery speed is reduced, the reel is driven by the water turbine, namely the recovery speed needs to be reduced by reducing the water turbine rotation speed, when the PE pipe is gradually recovered to the increased number of coiled layers, the PE pipe layer number sensing cross rod 113 is pushed to be lifted, the PE pipe layer number sensing cross rod 113 pulls the speed regulating pull rod 110 eccentrically connected with the PE pipe layer number sensing cross rod, the speed regulating pull rod 110 drives the fan-shaped speed regulator 16 to rotate, and the inner circular built-in speed regulating plate 15 is fixedly connected to the circle center of the fan-shaped speed regulator 16, so that the circular built-in speed regulating plate 15 can be driven to rotate.
Referring to fig. 1, 2 and 3, the circular built-in speed regulating plate 15 rotates to regulate the speed of the water turbine, the circular built-in speed regulating plate 15 rotates in the water inlet channel two 12 to control the flow passing through the water inlet channel two 12, when the circular built-in speed regulating plate 15 is parallel to the inlet surface of the water inlet channel two 12, the water inlet channel two 12 is closed, the liquid flow cannot flow in, when the circular built-in speed regulating plate 15 is perpendicular to the inlet surface of the water inlet channel two 12, the opening of the water inlet channel two 12 is maximum, and the liquid flow can flow in to the maximum extent. The total water inflow of the water inlet channel I11 and the water inflow of the water inlet channel II 12 are fixed, and the flow of the water inlet channel II 12 is controlled, so that the flow passing through the water inlet channel I11, namely the flow passing through the water turbine 2, is indirectly controlled, and the flow passing through the water turbine 2 is directly proportional to the rotating speed of the water turbine 2, thereby achieving the purpose of controlling the rotating speed of the water turbine 2. The circular concealed governor plate 15 is coated or provided with a soft elastic seal. The fan-shaped speed regulator 16, the gear hole 17, the gear control nut 18 and the speed regulating handle 19 are used for initial regulation of the PE pipe recovery speed during the sprinkling operation of the reel type sprinkling machine and further regulation of the recovery speed during the interlayer change of the PE pipe, and finally, the rotation amplitude of the circular concealed speed regulating plate 15 is regulated to control the rotation speed of the water turbine. The gear holes 17 of the fan-shaped speed regulator 16 are staggered and distributed according to different columns, so that the distribution density of the gear holes 17 is increased, the gap between adjacent gears is reduced, and the speed regulation precision is increased.
Referring to FIGS. 3 and 4, the gear holes 17 of the sector speed governor 16 are uniform in size, d in diameter, and distributed in n (n.gtoreq.2) rows with d in pitch, with the radial distance from the first gear hole 17 in row 1 to row n decreasing in order (i.e., r 11 ＞r 21 ＞…＞r n1 ) And row 1 is radially spaced from the first gear hole 17 of row n by a distance d (i.e., r 11 -r n1 =d), then the two adjacent rows of first gear holes 17 are radially spaced apart by d/(n-1) (i.e. r n-1 -r n =d/(n-1)). When the speed regulating pull rod 110 drives the fan-shaped speed regulator 16 to rotate, the distance L of the movement of the gear control nut 18 is fixed, the fan-shaped speed regulator 16 rotates by different angles theta along with different gear holes 17 where the gear control nut 18 is positioned, according to the conclusion that theta=2arcsin (L/2 r) (0 DEG is more than or equal to theta is less than or equal to 90 DEG), the larger the radial radius r where the gear holes 17 are positioned, the smaller the rotating angle theta of the fan-shaped speed regulator 16 is, and the circular built-in speed regulation is realizedThe smaller the amplitude of rotation of the speed plate 15, the smaller the flow change, the smaller the rotation speed change of the water turbine, and the higher the speed regulation precision. Therefore, the first gear hole 17 in the 1 st row on the fan-shaped speed regulator 16 is the minimum flow regulating gear, and the last gear hole 17 in the n th row is the maximum flow regulating gear.
Referring to FIG. 4, the gear holes 17 of the fan-shaped speed regulator 16 are staggered in n rows, the radial minimum distance between the centers of the gear holes 17 is less than or equal to d, while the gear holes of the existing in-line speed regulator are only 1 row, and the radial minimum distance between the centers of the gear holes is more than d. When the speed is regulated, when the speed regulating pull rod 110 pulls the gear control nut 18 in the gear hole 17 to move for the same distance, the fan-shaped speed regulator 16 can control the circular built-in speed regulating plate 15 to rotate by a smaller amplitude compared with an in-line speed regulator, so that the speed regulating precision is increased, and the space is saved. In one embodiment of the present invention, the gear holes 17 of the sector speed governor 16 are staggered by 2 columns n=2, each column has 5 rows, the radial distance of the first gear hole of the 1 st column and the 2 nd column is d, and the radial distance between the centers of the gear holes 17 is d.
The position of a gear hole 17 of a gear control nut 18 is regulated, the gear hole 17 corresponds to reel type sprinkling irrigation machines of different types, one gear corresponds to one transmission ratio, different speed regulating pull rod 110 displacements can be generated, different fan-shaped speed regulators 16 rotation amplitudes are corresponding, different positions of circular built-in speed regulating plates 15 are obtained, and when a speed regulating handle 19 rotates by the minimum amplitude under a certain gear, the current gear hole 17 is the primary gear hole 17 of the type. When the PE pipe is recovered to the interlayer change, the recovery speed can also generate an error with the set speed, when the PE pipe recovery speed is too high, the speed regulating handle 19 is further required to be shifted to increase the opening of the circular concealed speed regulating plate 15, the flow rate flowing into the first water inlet channel 11 is increased, namely the flow rate flowing into the second water inlet channel 12 is reduced, the rotation speed of the water turbine is reduced, and the PE pipe recovery speed is reduced. Conversely, when the recovery speed of the PE pipe is too low, the speed regulating handle 19 needs to be further moved to reduce the opening of the circular concealed speed regulating plate 15, so as to reduce the flow rate flowing into the first water inlet channel 11, i.e. increase the flow rate flowing into the second water inlet channel 12, and increase the rotation speed of the water turbine, thereby increasing the recovery speed of the PE pipe. Through the cooperation of two kinds of regulation, realize that the water turbine rotational speed is adjustable to guarantee PE pipe recovery speed and stabilize at the settlement speed.
According to one embodiment of the present invention, preferably, the S-type long and short blades of the water turbine 2 comprise a bullet-shaped locking nut 21, S-type blades 22 and a hub 23, the water turbine 2 and the gearbox housing 3 with a back cover plate are fixedly connected by a driving shaft 31, the S-type blades 22 are mounted on the hub 23, and the S-type blades 22 are cylindrical blades with S-type long blades and S-type short blades arranged alternately and uniformly distributed along the circumference. And the radial clearance between the S-shaped long blades and the S-shaped short blades is smaller than 1.5% of the diameter of the hydrodynamic turbine, so that the energy loss of jet flow of the nozzle is reduced, the leakage flow of the radial clearance is reduced, the leakage flow enters a backflow area formed by the blade flow passage, and the flow loss caused by the leakage flow of the radial clearance is reduced. The hub 23 is a concave conical surface, and the top end is fixedly connected with the bullet type locking nut 21. The S-shaped blades 22 are all of unequal heights, the heights of the S-shaped blades are continuously reduced from the center of the blades to the edges of the blades, so that the axial gap is kept uniform, the height of the gap is smaller than 15% of the maximum height of the blades, the leakage flow rate of fluid crossing the back surface of the working surface flow of the blades when flowing in the impeller is reduced, the vortex gathering area formed by the leakage flow of the axial gap on the back surface of the blades is reduced, the interference to the main flow is reduced, and the flow loss caused by the leakage flow of the axial gap is reduced. The S-shaped long and short blades 22 are in an S shape, and comprise a front C-shaped section and a rear C-shaped section along the flow direction of liquid flow, the concave directions of the front C-shaped section and the rear C-shaped section are opposite, the front C-shaped section and the rotating wheel are the same in rotation direction, and the rear C-shaped section and the rotating wheel are opposite in rotation direction. The short blade length is not less than 0.4 times of the impeller diameter. The blade profile curves of the S-shaped long and short blades are fitted under a rectangular coordinate system with an outlet point as an original point and a radius of an x-axis, and the fitted expressions are respectively as follows:
long blade:
short leaves:
wherein L1 、L 2 The projection lengths of the long blade profile curve and the short blade profile curve in the radial direction are respectively.
When the water turbine 2 works, the nozzle impacts one blade of the water turbine 2, the blade becomes the instantaneous main acting blade, the flow channel formed by the blade and the previous blade is the main acting flow channel, the main acting blade forms moment on the blade by utilizing the impact kinetic energy of jet flow of the nozzle, and the other blades form moment by utilizing the reaction force generated by the flow pressure energy and the kinetic energy. If the size of the inlet of the main acting runner just covers the jet flow of the nozzle, the energy of the outlet of the nozzle can be utilized as much as possible, the number of the existing runner blades is slightly less, the inlet of the runner is larger than the jet flow area of the nozzle, and the radial clearance at the outer edge of the blades is too large, so that when the nozzle impacts the blades, a part of liquid flow forms vortex flow around the main acting runner, a part of liquid flow leaks from the clearance and flows into the next runner, and the obvious hydraulic loss can be caused. In one embodiment of the present invention, the number of blades of the water turbine 2 is 14, which is larger than the number of blades of the existing water turbine 12, and the blade profile is S-shaped. After the number of the blades is increased, the size of the inlet of the flow channel is just matched with the jet flow area of the nozzle, the number of times of acting of the blades is increased, the shaft power of the water turbine 2 is improved, but the increased number of the blades can cause the outlet of the blades to be blocked, the blades are then converted into long and short blades, the number of the long blades is 7, and the number of the short blades is 7. The blades of different blade shapes can form flow channels with different bending degrees, so that the flow direction and the flow speed of pressure water between the flow channels are continuously changed along with the bending direction, the reaction force is generated on the blades, the reaction moment is generated, the S shape can properly increase the length of the flow channels, and the diffusion degree of the flow channels is reduced so as to reduce the local resistance loss. Compared with the existing C-shaped blade, the S-shaped blade has the advantages of longer flow channel and smaller section change, so that the diffusivity of the flow channel is smaller, the speed gradient is smaller, and the local loss during the liquid flow passing is smaller.
Referring to fig. 5 and 6, the s-type vanes 22 have significantly improved flow between the flow channels and significantly reduced velocity gradients within the flow channels as compared to the existing C-type vanes. As shown in fig. 9 and 10 under the working condition of rated flow 1.0Q, the outer edge of the main acting blade of the S-shaped blade 22 does not have obvious vortex disturbance due to the reduced inlet and radial clearance of the flow channel, the streamline of the rest non-main acting flow channels also basically accords with the ideal condition, each flow channel has a regular axial vortex opposite to the rotating direction of the rotating wheel, the rest flow channels of the C-shaped blade have two or more axial or radial irregular vortices with disordered rotating directions, and reflux vortex is generated on the low pressure surface of the blade, and leakage vortex is generated in the clearance of the blade edge, which inevitably accompanies larger energy loss, so that the efficiency is reduced. Under the working conditions of small flow rate 0.8Q (shown in combination with figures 7 and 8) and large flow rate 1.2Q (shown in combination with figures 11 and 12), the flow condition in the flow channel of the S-shaped blade 22 is basically the same as the rated working condition, no obvious hydraulic loss occurs, and the working conditions of 0.8Q to 1.2Q are all high-efficiency operation areas. Under the working condition of small flow of 0.8Q of the C-shaped blade, the main working flow channel has obvious flow-off vortex, other flow channels are similar to the rated working condition, the flow is more turbulent, under the working condition of large flow of 1.2Q, the flow of other flow channels is still more turbulent, and the low-pressure surface of the blade obviously generates more backflow vortex.
Referring to fig. 15 and 16, the s-shaped vane 22 includes a front C-shaped section and a rear C-shaped section in the flow direction, the front and rear C-shaped concavities being opposite in direction, the front C-shaped section being in the same rotational direction as the rotor wheel to facilitate collection of kinetic energy of the nozzle jet; the slope of the rear C-shaped section is opposite to that of the front C-shaped section, and the slope of the rear C-shaped section is opposite to that of the front C-shaped section, so that the length of a runner is increased, the speed moment of an inlet and an outlet of the runner is changed sufficiently, the action moment of water flow on the runner is increased, the flow guiding function on fluid between blade paths is achieved, the backflow of a low-pressure surface and She Daoguo are reduced, the energy of the liquid flow is fully utilized, and the efficiency of a water turbine is improved. In one embodiment of the invention, the short blade length is no less than 0.4 times the impeller diameter, which does not result in insufficient speed moment change due to too short blades nor blockage of the outlet flow passage due to too long blades.
Referring to fig. 15 and 16, the water outlet channel is located in another radial plane parallel to the runner after the runner outlet, the liquid flow in the runner flows in the radial plane where the runner is located, the existing impeller type can generate larger impact loss when the liquid flow flows from the impeller outlet into the water outlet channel, and the bullet-shaped locking nut 21 and the concave conical hub 23 are arranged and are in tangent smooth connection with each other, so that the plane of the runner outlet is lifted, the normal outflow is realized as much as possible, even if the liquid flow flows out along the axis direction of the water outlet channel without rotary motion when leaving the runner, the impact loss of the runner outlet area is reduced, and the vortex phenomenon in the water outlet channel is also reduced.
Referring to fig. 13 and 14, compared with the existing C-shaped blade, the s-shaped long and short blades have obviously reduced circumferential speed extreme values, circumferential speed gradients and larger circumferential speed distribution ranges at the outlet section of the rotating wheel (namely the inlet section of the water outlet channel).
The reel type sprinkler has different types, different PE pipe specifications and different recovery speed ranges. When the sprinkling irrigation operation is carried out, a proper gear hole is needed to be selected through initial adjustment, and when the PE pipe interlayer changes to generate a speed error, a speed regulating handle is needed to be used for further adjustment. The recovery speed of the PE pipe can be measured manually by a stopwatch or a tape measure, or measured by a special linear speed instrument.
The speed regulating method of the integrated speed regulating water turbine of the reel type sprinkler comprises the following steps:
1) Before sprinkling irrigation, a gear hole 17 is initially selected on a fan-shaped speed regulator 16 and is locked by a gear control nut 18;
2) Adjusting the sprinkling irrigation operation, measuring the current recovery speed, and if the current recovery speed is inconsistent with the set recovery speed, stirring the speed regulating handle 19 for adjustment;
3) Repeating the steps until the current recovery speed reaches the set recovery speed, and selecting the current gear hole 17 to start sprinkling irrigation operation if the rotation amplitude of the speed regulating handle 19 is minimum;
4) When the PE pipe layer is changed after the sprinkling irrigation operation is started, if the recovery speed is inconsistent with the set speed, the speed regulating handle 19 is stirred for further adjustment, so that the recovery speed of the PE pipe is stabilized at the set speed value.
It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. The integrated speed-adjustable water turbine of the reel type sprinkler is characterized by comprising an integrated water inlet and outlet front cover plate structure (1), a water turbine (2) and a reduction gearbox shell (3);
the water inlet and outlet front cover plate structure (1) is provided with a fan-shaped speed regulator (16), and the fan-shaped speed regulator (16) is connected with the water inlet end of the water inlet and outlet front cover plate structure (1); the water inlet and outlet front cover plate structure (1) is rotationally connected with a water turbine (2), and the water turbine (2) is provided with S-shaped blades (22); the water turbine (2) is connected with a driving shaft (31), the driving shaft (31) is connected to the reduction gearbox shell (3), and the water inlet and outlet front cover plate structure (1) is connected with the reduction gearbox shell (3) in a sealing manner;
the water inlet end of the water inlet and outlet front cover plate structure (1) is provided with a first water inlet channel (11) and a second water inlet channel (12), the water outlet end of the water inlet and outlet front cover plate structure (1) is provided with a water outlet channel (14), the first water inlet channel (11) and the second water inlet channel (12) are positioned at the tangential position of the water turbine (2), the second water inlet channel (12) is connected with a nozzle (13), and the water outlet channel (14) is positioned at the axial position of the water turbine (2);
the utility model discloses a speed regulation device for a sprinkler, including a reel, a speed regulation handle, a speed regulation control nut, a connecting rod (111) and a tie rod (111), the water inlet channel one (11) is connected with circular concealed speed regulation board (15), circular concealed speed regulation board (15) includes the plectane, and the plectane is installed in the axis of rotation, and the one end and the fan-shaped speed regulator (16) of axis of rotation are connected, fan-shaped speed regulator (16) upper end is equipped with speed regulation handle (19), fan-shaped speed regulator (16) are equipped with a plurality of fender position holes (17), and fender position hole (17) are used for increasing the speed regulation precision, fender position hole (17) are used for connecting fender position control nut (18), fender position control nut (18) are connected with speed regulation pull rod (110), speed regulation pull rod (110) are connected with connecting rod (111), connecting rod (111) are connected with tensioning spring (112) one end, the tensioning spring (112) other end is used for connecting in the sprinkler frame, speed regulation pull rod (110) are connected with PE pipe perception horizontal pole (113), PE pipe perception horizontal pole number of piles (113) are used for compressing tightly on the reel outermost PE pipe.
2. The integrated speed-adjustable water turbine for the reel type sprinkler according to claim 1, wherein the water turbine (2) is an S-shaped long and short blade water turbine, an S-shaped blade (22) and a hub (23) are arranged, the S-shaped blade (22) is arranged on the hub (23), and the S-shaped blades (22) are cylindrical blades which are formed by alternately arranging S-shaped long blades and S-shaped short blades and uniformly distributed along the circumference.
3. The reel-type sprinkler integrated speed adjustable water turbine according to claim 2, wherein the radial clearance between the blades of the S-shaped long blades and the S-shaped short blades is less than 1.5% of the diameter of the water turbine; the S-shaped blades (22) are all of unequal heights, the heights of the S-shaped blades are continuously reduced from the center of the blades to the edges of the blades, so that the axial clearance between the tops of the S-shaped blades (22) and the water inlet and outlet front cover plate structure (1) is kept uniform, and the clearance height is less than 15% of the maximum blade height.
4. The integrated speed-adjustable water turbine for a reel-type sprinkler according to claim 2, wherein the reduction gearbox housing (3) is provided with a rear cover plate.
5. The integrated speed-adjustable water turbine for a reel type sprinkler according to claim 4, wherein the central area of the rear cover plate surface is a conical surface, the hub (23) is a concave conical surface, and the outlet end of the hub is connected with a bullet type locking nut (21); the water outlet channel (14) is a variable-section bent pipe water outlet channel, and the diameter of the water outlet channel (14) is gradually increased from the front end to the tail end and then is kept unchanged.
6. The integrated speed-adjustable water turbine for a reel type sprinkler according to claim 2, wherein the S-shaped blades (22) are S-shaped and comprise a front C-shaped section and a rear C-shaped section along the flow direction, the front C-shaped section and the rear C-shaped section are opposite in the direction of concave surfaces, the front C-shaped section is the same as the rotating wheel in the same rotation direction, and the rear C-shaped section and the rotating wheel are opposite in rotation direction; the blade profile curves of the S-shaped long blade and the S-shaped short blade are fitted under a rectangular coordinate system with an outlet point as an origin and a radius of an x axis, and the fitted expressions are respectively as follows:
long blade:
，
short leaves:
，
wherein ,L 1 、L 2 the projection lengths of the long-blade profile curve and the short-blade profile curve in the radial direction are respectively.
7. The integrated speed-adjustable water turbine for a reel type sprinkler according to claim 2, wherein the gear holes (17) of the fan-shaped speed regulator (16) are uniform in size and have diametersdThe gear hole (17) is pressednThe rows are distributed in a staggered manner,nmore than or equal to 2, each row is provided with a plurality of gear holes, and the intervals of the gear holes (17) in each row are alldColumn 1 to 1nThe radial distance from the first gear hole (17) of the row to the center point of the fan shape is reduced in sequence, namelyr 11 ＞r 21 ＞…＞r n1 And column 1nThe first gear holes (17) of the row are radially spaced apartdI.e.r 11 -r n1 =dThe adjacent two rows of first gear holes (17) are radially spaced apartd/(n-1), i.er n-1 -r n =d/(n-1), wherein,r 11 the radial distance between the 1 st row gear hole of the 1 st column and the center point of the fan shape is shown,r 21 represent 2 ndThe radial distance from the column 1 row gear hole to the fan-shaped center point;r n1 the radial distance between the nth row of 1 st gear holes and the center point of the fan shape is shown;r n、 r n-1 the radial distance between the gear holes in the nth row and the n-1 th row with the same line number and the center point of the fan shape is respectively shown.
8. A method for regulating the speed of an integrated speed-adjustable water turbine for a reel-type sprinkler according to any one of claims 1-7, comprising the steps of:
1) Before sprinkling irrigation operation, a gear hole (17) is initially selected on a fan-shaped speed regulator (16) and is locked by a gear control nut (18);
2) Adjusting the sprinkling irrigation operation, measuring the current recovery speed, and if the current recovery speed is inconsistent with the set recovery speed, stirring a speed regulating handle (19) for adjustment;
3) Repeating the steps until the current recovery speed reaches the set recovery speed, and selecting the current gear hole (17) to start sprinkling irrigation operation if the rotation amplitude of the speed regulating handle (19) is minimum;
4) When the PE pipe layer is changed after the spray irrigation operation is started, if the recovery speed is inconsistent with the set speed, the speed regulating handle (19) is stirred for further adjustment, so that the recovery speed of the PE pipe is stabilized at the set speed value.
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| CN216974931U (en) * | 2022-04-02 | 2022-07-15 | 罗伯特·博世有限公司 | Turbine blade, turbine and turbocharger for fuel cell system |
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| CN107853142A (en) * | 2017-11-30 | 2018-03-30 | 江苏华源节水股份有限公司 | A kind of eccentric swing stepping rollback type sprinkler with reel |
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| US3972478A (en) * | 1975-12-30 | 1976-08-03 | Heinzman Engineering, Inc. (Entire) | Hydraulic actuated load sensing governor |
| FR2359576A1 (en) * | 1976-07-28 | 1978-02-24 | Perrot Regnerbau Gmbh & Co | Irrigation system with movable sprinkler - has supply pipe coil wound in drum driven by water turbine with flow deflector (NL 31.1.78) |
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| CN116220987A (en) | 2023-06-06 |
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