CN117989136A - Disc tooth type composite centrifugal pump - Google Patents
Disc tooth type composite centrifugal pump Download PDFInfo
- Publication number
- CN117989136A CN117989136A CN202410408648.6A CN202410408648A CN117989136A CN 117989136 A CN117989136 A CN 117989136A CN 202410408648 A CN202410408648 A CN 202410408648A CN 117989136 A CN117989136 A CN 117989136A
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- pump
- water
- shell
- centrifugal pump
- tooth type
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- 239000002131 composite material Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 189
- 230000007246 mechanism Effects 0.000 claims abstract description 71
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 56
- 150000001875 compounds Chemical class 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 66
- 238000001914 filtration Methods 0.000 description 25
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a disc tooth type composite centrifugal pump, which relates to the technical field of centrifugal pumps and comprises a centrifugal pump body, a composite pump water mechanism and a pump water power mechanism, wherein the centrifugal pump body comprises a pump shell, longitudinal sections at the left end and the right end of the pump shell are of semicircular structures, a raised water outlet is formed in the middle of the upper side of the pump shell, a pump cover is fixedly connected with a front opening of the pump shell through a fixing screw, the composite pump water mechanism comprises a hollow disc, the left end and the right end of the rear side of the pump shell are respectively connected with two longitudinal rotating shafts through sealing bearings in a rotating mode, and the front ends of the two rotating shafts extend to the pump shell and are respectively and fixedly connected with the middle parts of the two hollow discs. The disc tooth type composite centrifugal pump combines the advantages of the centrifugal pump and the gear pump together, has large treatment capacity on liquid medium compared with the gear pump, has strong adaptability on viscous granular medium, and has good universality because the pump does not need to be replaced by filling water into a pump shell before starting.
Description
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to a disc tooth type composite centrifugal pump.
Background
At present, gear pumps and centrifugal pumps are two common pumps for conveying liquid media, the gear pumps are positive displacement rotary pumps, the treatment is small, the main part of the centrifugal pumps is a pump shell and an impeller in the shell, a machine shaft of the impeller is connected with a motor, water is filled in the pump shell before the water pump is started, so that air in the shell is discharged, the impeller is driven by the motor to rotate at a high speed after the water pump is started, the water in the pump shell also rotates at a high speed along with the impeller, the pressure around the impeller is greatly reduced due to the inertia of the water and the pressure around the impeller is increased, the atmospheric pressure pushes a bottom valve to enter the pump shell, and the centrifugal pump is generally used for conveying a large amount of liquid; and the centrifugal pump is more durable under the conditions of cleaner conveying and large flow, and the gear pump is more durable when conveying liquid which is denser, high in viscosity and contains particles, and the two pumps have pertinency to treatment media and poor universality.
Disclosure of Invention
The invention aims to overcome the existing defects, provides the disc tooth type composite centrifugal pump, combines the advantages of the centrifugal pump and the gear pump, has high processing capacity compared with the gear pump on liquid media, and can effectively solve the problems in the prior art because the pump shell is not filled with water before starting, is suitable for conveying clean and high-flow liquid media and dense and high-viscosity liquid media, has good universality because the pump type is not required to be replaced for liquid media with different properties.
In order to achieve the above purpose, the present invention provides the following technical solutions: a disk tooth type compound centrifugal pump comprising:
The centrifugal pump body comprises a pump shell, fixing screws, a pump cover and a water outlet, longitudinal sections at the left end and the right end of the pump shell are of semicircular structures, a raised water outlet is arranged in the middle of the upper side of the pump shell, and the front side opening of the pump shell is fixedly connected with the pump cover through the fixing screws;
The composite water pumping mechanism comprises a hollow disc, toothed blades, centrifugal water gaps, water inlet round holes, water inlet pipes, rotating shafts and sealing bearings, wherein the left end and the right end of the rear side of a pump shell are respectively connected with two longitudinal rotating shafts through the sealing bearings in a rotating mode, the front ends of the two rotating shafts extend to the pump shell and are respectively and fixedly connected with the middle parts of the two hollow discs, the annular arrays on the outer periphery of the hollow discs are provided with the toothed blades, the toothed blades of the two hollow discs, which are close to each other, are arranged in a staggered mode, extrusion gaps are reserved between the toothed blades of the two hollow discs, triangular cavities are formed in the toothed blades, the triangular cavities are communicated with the inside of the hollow discs, centrifugal water gaps are formed in one ends, far away from the hollow discs, of the hollow discs, water inlet round holes are formed in the middle parts of the front sides of the hollow discs, the two water inlet pipes are inserted in the pump cover, and the rear ends of the two water inlet pipes extend to the middle parts of the two water inlet round holes respectively;
And the pump water power mechanism is respectively connected with the rear ends of the two rotating shafts and drives the two rotating shafts to reversely rotate.
The liquid medium flows into the hollow disc from the water inlet pipe and the water inlet round hole, the pump hydrodynamic mechanism works to drive the two rotating shafts to rotate reversely, the rotating shafts on the left side rotate anticlockwise, the rotating shafts on the right side rotate clockwise, thereby driving the two hollow discs to rotate reversely, the liquid medium in the two hollow discs is thrown into the toothed blades through centrifugal force, then the liquid medium flows into the gap between the pump shell and the hollow discs through the centrifugal water gap until the pump shell is filled with water, the external liquid medium can continuously flow into the hollow discs due to the water level, and the external liquid medium is promoted to flow into the hollow discs faster due to pressure change in the hollow discs, and the two liquid media are collected at the water outlet due to centrifugal force brought by the toothed blades on the two hollow discs, the transverse forces of the two liquid media are mutually neutralized, the upward impact forces of the two liquid media are collected at the water outlet, the output liquid medium is discharged outwards, the lift is large, and the toothed blades on the two hollow discs are extruded, the output force of the liquid medium is increased, and the pump shell can be detached or installed through the fixing screws, so that the pump cover can be detached or installed conveniently or maintained.
Further, the composite pump water mechanism further comprises a water discharging circular cover, the rear ends of the two water inlet pipes are respectively and fixedly connected with the two water discharging circular covers, and the water discharging circular cover is rotatably connected with the inner wall of the corresponding water inlet circular hole.
The liquid medium flowing backwards in the water inlet pipe enters the hollow disc through the water discharging circular cover, so that the liquid medium flowing from the rear end of the water inlet pipe is prevented from directly overflowing from the water inlet circular hole to the position between the pump shell and the hollow disc, the liquid medium is ensured to be thrown out from the centrifugal water gap fully by centrifugal force, and the power loss of the pump is avoided.
Further, the compound pump mechanism still includes vortex blade, the front end of pivot extends to the interior rear side of hollow dish, and the front end portion of pivot is the toper structure, the front end periphery side of pivot passes through the vortex blade and the interior rear side fixed connection of hollow dish that annular array set up, and the interior front side wall of hollow dish is round the round hole of intaking also annular array fixedly connected with vortex blade.
The liquid medium flowing into the hollow disc is shunted after meeting the conical structure at the front end of the rotating shaft, the connection strength of the rotating shaft and the hollow disc can be improved by the turbulence blades, meanwhile, the liquid medium in the hollow disc can be stirred to move towards the edge, and the full utilization of the centrifugal force of the hollow disc to the liquid medium is improved.
Furthermore, the centrifugal pump body also comprises a water outlet pipeline and a one-way water outlet valve, the top of the water outlet is fixedly connected with the bottom end of the L-shaped water outlet pipeline, and the water outlet pipeline is connected with the one-way water outlet valve in series.
The liquid medium pumped out from the water outlet flows out from the water outlet pipeline, the liquid medium in the water outlet pipeline can only flow out by the unidirectional water outlet valve, and if the pump stops working, the liquid medium in the water outlet pipeline cannot flow back.
Further, the centrifugal pump body also comprises a guide block, and a triangular guide block is arranged at the center of the bottom in the pump shell.
The flow guiding block guides the liquid medium at the bottom in the pump shell, so that the liquid medium moves upwards along with the stirring of the toothed blades, and the flowing dead angle of the liquid medium is prevented from being formed at the center of the bottom in the pump shell.
Further, the device also comprises a water diversion mechanism, wherein two interfaces at the rear end of the water diversion mechanism are respectively connected with the front ends of the two water inlet pipes, and the water diversion mechanism divides the liquid medium needing to be pumped into two streams to enter the two water inlet pipes, so that the requirement of entering the liquid medium in the two hollow discs is met.
Further, the device also comprises a water filtering mechanism, wherein the rear end of the water filtering mechanism is fixedly connected with an interface at the front end of the water dividing mechanism, and the water filtering mechanism can be added according to the requirement to filter the liquid medium in advance.
Further, still include installation shell and pump body installation mechanism, the pump body installation mechanism fixed connection pump shell is passed through in the installation shell bottom, and the installation shell is used for installing pump body installation mechanism and compound pump water mechanism, because compound pump water mechanism and pump hydrodynamic mechanism have two sets of centrifugal parts, vibrations are bigger, adopts pump body installation mechanism to install the pump shell firmly, improves the stability of disc tooth type compound centrifugal pump operation.
Further, pump body installation mechanism includes fixing base, arc installation curb plate, locking bolt and locating component, fixed seat fixedly connected with in the installation shell bottom, the fixing base passes through the bottom joint of locating component and pump case, the bottom of two arc installation curb plates is connected through opposite displacement control assembly to the side of fixing base, and two arc installation curb plates are located the left and right sides of pump case respectively, and threaded connection has locking bolt in the top screw of two arc installation curb plates respectively.
The pump shell can be positioned after being placed in the installation shell through the positioning component, the opposite displacement control component can control the two arc installation side plates to be close to each other, the two arc installation side plates clamp the left side and the right side of the pump shell, and the pump shell can be locked after the locking bolts are screwed tightly, so that the pump shell is stably fixed between the two arc installation side plates.
Two clamping holes are respectively formed in two sides of the top of the pump shell, and the bottom ends of the two locking bolts are clamped into the two clamping holes, so that the pump shell is firmly fixed by the arc-shaped installation side plates.
Further, locating component includes recess, fixture block, locating piece and location draw-in groove, the recess has been seted up at the top of fixing base, the middle part is provided with the fixture block in the recess, the bottom center fixedly connected with locating piece of pump case, in the recess was gone into to the bottom card of locating piece, and the location draw-in groove with the fixture block joint has been seted up to the bottom of locating piece, the fixture block is with the location draw-in groove joint of locating piece bottom, can make pump case position installation accurate, then can be installed by arc installation curb plate stability.
Compared with the prior art, the invention has the beneficial effects that: the disc tooth type composite centrifugal pump has the following advantages:
1. The advantages of the centrifugal pump and the gear pump are combined together, compared with the gear pump, the processing capacity of the gear pump on the liquid medium is large, and meanwhile, the pump shell is not filled with water before starting.
2. The device is suitable for conveying clean liquid medium with large flow rate, is also suitable for conveying dense liquid medium with high viscosity, does not need to replace pumps aiming at liquid medium with different properties, and has good universality.
Drawings
FIG. 1 is a schematic diagram of a disk tooth type composite centrifugal pump according to the present invention;
FIG. 2 is a schematic view of the internal structure of the installation housing in the disk tooth type composite centrifugal pump of the present invention;
FIG. 3 is a schematic view showing a sectional structure of a rear end of a disk tooth type composite centrifugal pump mounting case of the present invention;
FIG. 4 is a schematic view of the internal structure of the disk tooth type composite centrifugal pump of the invention;
FIG. 5 is a schematic view of the bottom structure of the pump body mounting mechanism in the disk tooth type composite centrifugal pump of the present invention;
FIG. 6 is a schematic view of the internal structure of a pump casing in the disk tooth type composite centrifugal pump of the present invention;
FIG. 7 is a schematic cross-sectional view of a hollow disc in a disc-tooth type composite centrifugal pump according to the present invention;
fig. 8 is a schematic diagram of a cross-section of a hollow disc in a disc-tooth type composite centrifugal pump according to the present invention.
In the figure: 1 mounting shell, 2 tool holes, 3 centrifugal pump bodies, 31 pump shell, 32 fixing screws, 33 pump covers, 34 water outlets, 35 diversion blocks, 36 clamping holes, 37 water outlet pipelines, 38 one-way water outlet valves, 4 composite pump water mechanisms, 41 hollow discs, 42 toothed blades, 43 centrifugal water outlets, 44 water inlet round holes, 45 water inlet pipes, 46 water outlet round covers, 47 rotating shafts, 48 turbulence blades, 49 sealing bearings, 5 pump body mounting mechanisms, 51 fixing seats, 52 grooves, 53 clamping blocks, 54 positioning blocks, 55 positioning clamping grooves, 56 side connection blocks, 57 transverse screws, 58 transverse sliding columns, 59 connecting frames, 510 arc mounting side plates, 511 locking bolts, 6 pump water power mechanisms, 61 power motors, 62 driving gears, 63 driven gears, 64 motor sleeves, 65 electric fixing seats, 66 fixing bolts, 7 water distribution mechanisms, 71 main pipes, 72 branch pipes, 73 connecting rings, 8 water filtering mechanisms, 81 water filtering inlet pipes, 82 water filtering devices, 83 water filtering outlet pipes, 84 clamps, 9 top covers and 10 mounting screws.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
Referring to fig. 3 to 8, the present embodiment provides a technical solution: a disc tooth type composite centrifugal pump comprises a centrifugal pump body 3, a composite pump water mechanism 4 and a pump water power mechanism 6;
the centrifugal pump body 3 comprises a pump shell 31, a set screw 32, a pump cover 33 and a water outlet 34, wherein the longitudinal sections of the left end and the right end of the pump shell 31 are of semicircular structures, the middle part of the upper side of the pump shell 31 is provided with the raised water outlet 34, and the front opening of the pump shell 31 is fixedly connected with the pump cover 33 through the set screw 32;
The centrifugal pump body 3 also comprises a water outlet pipeline 37 and a one-way water outlet valve 38, the top of the water outlet 34 is fixedly connected with the bottom end of the L-shaped water outlet pipeline 37, and the water outlet pipeline 37 is connected with the one-way water outlet valve 38 in series.
The liquid medium pumped out from the water outlet 34 flows out from the water outlet pipeline 37, the liquid medium in the water outlet pipeline 37 can only flow out by means of the one-way water outlet valve 38, and if the pump stops working, the liquid medium in the water outlet pipeline 37 cannot flow back.
The centrifugal pump body 3 further comprises a guide block 35, and a triangular guide block 35 is arranged at the center of the bottom in the pump shell 31.
The flow guiding block 35 guides the liquid medium at the inner bottom of the pump shell 31, so that the liquid medium moves upwards along with the stirring of the toothed blades 42 in the compound pump mechanism 4, and the dead angle of the liquid medium flowing is avoided from forming at the inner bottom center of the pump shell 31.
The compound water pumping mechanism 4 comprises a hollow disc 41, toothed blades 42, centrifugal water gaps 43, water inlet round holes 44, water inlet pipes 45, rotating shafts 47 and sealing bearings 49, wherein the left end and the right end of the rear side of a pump shell 31 are respectively connected with two longitudinal rotating shafts 47 in a rotating way through the sealing bearings 49, the front ends of the two rotating shafts 47 extend to the pump shell 31 and are respectively and fixedly connected with the middle parts of the two hollow discs 41, the toothed blades 42 are arranged on the annular array on the outer periphery of the hollow discs 41, the toothed blades 42, which are mutually close, of the two hollow discs 41 are staggered, extrusion gaps are reserved between the toothed blades 42, which are mutually close, triangular cavities are arranged in the toothed blades 42, the triangular cavities are communicated with the inside of the hollow discs 41, one ends, which are far away from the hollow discs 41, of the toothed blades 42 are provided with the centrifugal water gaps 43, the middle parts of the front sides of the hollow discs 41 are provided with water inlet round holes 44, the rear ends of the two water inlet pipes 45 are respectively extended to the middle parts of the two water inlet round holes 44, and the pump cover 33 are alternately provided with two water inlet pipes 45;
The composite pump mechanism 4 further comprises a water discharging circular cover 46, the rear ends of the two water inlet pipes 45 are respectively and fixedly connected with the two water discharging circular covers 46, and the water discharging circular covers 46 are rotatably connected with the inner walls of the corresponding water inlet circular holes 44.
The liquid medium flowing backwards in the water inlet pipe 45 enters the hollow disc 41 through the water discharging circular cover 46, so that the liquid medium flowing from the rear end of the water inlet pipe 45 is prevented from directly overflowing from the water inlet circular hole 44 to the hollow disc 41 and entering between the pump shell 31 and the hollow disc 41, the liquid medium is ensured to be fully thrown out from the centrifugal water gap 43 by centrifugal force, and the power loss of the pump is avoided.
The compound pump mechanism 4 further comprises turbulence blades 48, the front end of the rotating shaft 47 extends to the inner rear side of the hollow disc 41, the front end of the rotating shaft 47 is of a conical structure, the outer peripheral side of the front end of the rotating shaft 47 is fixedly connected with the inner rear side of the hollow disc 41 through the turbulence blades 48 arranged in an annular array, the front side wall in the hollow disc 41 is fixedly connected with the turbulence blades 48 around the water inlet round hole 44 in an annular array, and a group of turbulence blades 48 on the inner front side of the hollow disc 41 and a group of turbulence blades 48 on the inner rear side of the hollow disc 41 jointly form a discontinuous turbulence blade group.
The liquid medium flowing into the hollow disc 41 is shunted after meeting the conical structure at the front end of the rotating shaft 47, the connecting strength of the rotating shaft 47 and the hollow disc 41 can be improved by the turbulence blades 48, meanwhile, the liquid medium in the hollow disc 41 can be stirred to move towards the edge, and the full utilization of the centrifugal force of the liquid medium by the hollow disc 41 is improved.
The pump hydrodynamic mechanism 6 is respectively connected with the rear ends of the two rotating shafts 47, and the pump hydrodynamic mechanism 6 drives the two rotating shafts 47 to reversely rotate.
The pump hydrodynamic mechanism 6 comprises a power motor 61, a driving gear 62, a driven gear 63, a motor sleeve 64, an electric fixing seat 65 and a fixing bolt 66, wherein the power motor 61 is installed in the motor sleeve 64, the bottom of the motor sleeve 64 is fixedly connected with the electric fixing seat 65, the fixing bolts 66 are respectively connected with screw holes at two ends of the electric fixing seat 65 in a threaded mode, the rear ends of the two rotating shafts 47 are respectively and fixedly connected with the two driven gears 63, the two driven gears 63 are meshed with each other, an output shaft of the power motor 61 is fixedly connected with the driving gear 62, the driving gear 62 is meshed with one of the driven gears 63, the power motor 61 adopts the prior art, a proper type can be selected according to requirements, and a speed regulating motor can be selected.
The motor sleeve 64, the electric fixing seat 65 and the fixing bolt 66 are fixed to the power motor 61, the power motor 61 works to drive the driving gear 62 to rotate, then the driven gear 63 is driven to rotate through meshing transmission, and the two rotating shafts 47 can be reversely rotated by meshing of the two driven gears 63.
When the centrifugal pump is used, liquid medium flows into the hollow disc 41 from the water inlet pipe 45 and the water inlet round hole 44, the pump hydrodynamic mechanism 6 works to drive the two rotating shafts 47 to rotate reversely, wherein the rotating shaft 47 on the left side rotates anticlockwise, the rotating shaft 47 on the right side rotates clockwise so as to drive the two hollow discs 41 to rotate reversely, the liquid medium in the two hollow discs 41 is thrown into the toothed blades 42 through centrifugal force, then the liquid medium flows into a gap between the pump shell 31 and the hollow discs 41 through the centrifugal water gap 43 until the pump shell 31 is filled with water, the external liquid medium can continuously flow into the hollow discs 41 due to the water level, and the pressure change in the hollow discs 41 causes the external liquid medium to flow into the hollow discs 41 more quickly;
And because the centrifugal force brought by the toothed blades 42 on the two hollow discs 41 causes two liquid media to be converged at the water outlet 34, the transverse forces of the two liquid media are mutually neutralized, the upward impact forces of the two liquid media are converged at the water outlet 34 and are discharged outwards, the output liquid media has high lift, and the toothed blades 42 on the two hollow discs 41 increase the output force of the liquid media through extrusion, the pump cover 33 can be detached or installed through the fixing screw 32, and the composite pump mechanism 4 in the pump shell 31 is convenient to install or maintain.
In a second embodiment, referring to fig. 2 and 4, the present embodiment provides a technical solution: the disk tooth type composite centrifugal pump of this embodiment has substantially the same structure as that of the first embodiment, except that:
The device also comprises a water diversion mechanism 7, wherein two interfaces at the rear end of the water diversion mechanism 7 are respectively connected with the front ends of the two water inlet pipes 45, and the water diversion mechanism 7 divides the liquid medium needing to be pumped into two streams to enter the two water inlet pipes 45, so that the requirement of entering the liquid medium in the two hollow discs 41 is met.
The water diversion mechanism 7 comprises a main pipe 71, branch pipes 72 and a connecting ring 73, the rear ends of the main pipe 71 are fixedly connected with the front ends of the two branch pipes 72, the rear ends of the two branch pipes 72 are respectively fixedly connected with the front ends of the two water inlet pipes 45 through the connecting ring 73, a liquid medium is divided into two branches from the rear end of the main pipe 71 and enters the two branch pipes 72, then enters the water inlet pipes 45 respectively, and the connecting ring 73 fixedly connects the rear ends of the branch pipes 72 with the front ends of the water inlet pipes 45, so that the disassembly is convenient.
Referring to fig. 1 to 2, the present embodiment provides a technical solution: the disc tooth type composite centrifugal pump has the same structure as the second embodiment, except that:
The filter also comprises a water filtering mechanism 8, the rear end of the water filtering mechanism 8 is fixedly connected with the interface of the front end of the water dividing mechanism 7, and the water filtering mechanism 8 can be added according to the requirement to filter the liquid medium in advance.
The water filtering mechanism 8 comprises a water filtering inlet pipe 81, a water filter 82, a water filtering outlet pipe 83 and a clamp 84, wherein the rear end of the water filtering inlet pipe 81 is fixedly connected with the front end inlet of the water filter 82, the rear end outlet of the water filter 82 is fixedly connected with the front end of the water filtering outlet pipe 83, the rear end of the water filtering outlet pipe 83 is fixedly sleeved with the front end of the main pipe 71, the outer side of the rear end of the water filtering outlet pipe 83 is fixed at the front end of the main pipe 71 through the clamp 84, if external liquid media are required to be filtered, after the water filtering mechanism 8 is added, the liquid media enter the water filter 82 through the water filtering inlet pipe 81, the liquid media are filtered and enter the main pipe 71 through the water filtering outlet pipe 83, and the clamp 84 ensures that the water filtering outlet pipe 83 and the main pipe 71 are stably connected, and the water filter 82 adopts the prior art, and different types can be replaced according to requirements.
In a fourth embodiment, referring to fig. 1 to 4, the present embodiment provides a technical solution: the disc tooth type composite centrifugal pump has the same structure as the third embodiment, except that:
Still include installation shell 1 and pump body installation mechanism 5, the pump shell 31 is passed through pump body installation mechanism 5 fixed connection in the installation shell 1, and installation shell 1 is used for installing pump body installation mechanism 5 and compound pump water mechanism 4, because compound pump water mechanism 4 and pump hydrodynamic mechanism 6 have two sets of centrifugal parts, vibrations are bigger, adopts pump body installation mechanism 5 to firmly install pump shell 31, improves the stability of disc tooth type compound centrifugal pump operation.
The bottom of the fixing bolt 66 is in threaded connection with a screw hole at the inner bottom of the installation shell 1, so that the power motor 61 is fixed to the inner bottom of the installation shell 1;
The water filtering inlet pipe 81 passes through a round hole at the front end of the installation shell 1, and the water filtering inlet pipe 81 can slide back and forth relative to the installation shell 1, so that the water filter 82, the water filtering outlet pipe 83 and the clamp 84 can be conveniently moved back and forth, and the water filtering outlet pipe 83 can be conveniently moved forward to be disconnected with the main pipe 71 when the water filter 82 is replaced.
Four corners of the top of the installation shell 1 are fixedly connected with four corners of the top cover 9 through four installation screws 10, the top opening of the installation shell 1 is closed by the top cover 9, the top cover 9 can be conveniently detached by means of the installation screws 10, maintenance is carried out on components in the installation shell 1, and a water outlet pipeline 37 penetrates through a through hole in the top cover 9.
The pump body installation mechanism 5 comprises a fixed seat 51, arc installation side plates 510, locking bolts 511 and a positioning component, the fixed seat 51 is fixedly connected to the inner bottom of the installation shell 1, the fixed seat 51 is connected with the bottom of the pump shell 31 in a clamping mode through the positioning component, the side faces of the fixed seat 51 are connected with the bottoms of the two arc installation side plates 510 through opposite displacement control components, the two arc installation side plates 510 are respectively located on the left side and the right side of the pump shell 31, and the locking bolts 511 are respectively connected in top end screw holes of the two arc installation side plates 510 in a threaded mode.
The opposite displacement control assembly comprises a side joint block 56, a transverse screw rod 57, a transverse slide column 58 and a connecting frame 59, wherein the side joint block 56 is fixedly connected to the front side of the fixed seat 51, the side joint block 56 is fixedly connected with the middle part of the transverse slide column 58, the side joint block 56 is further rotationally connected with the middle part of the transverse screw rod 57, the screw threads at two ends of the transverse screw rod 57 are opposite in direction, two ends of the transverse screw rod 57 are respectively in threaded connection with the screw threads at the bottom sides of the two connecting frames 59, sliding holes at the bottom sides of the two connecting frames 59 are respectively in sliding connection with the two ends of the transverse slide column 58, the tops of the two connecting frames 59 are respectively fixedly connected with the bottoms of the two arc-shaped mounting side plates 510, the end of the transverse screw rod 57 is twisted, the two connecting frames 59 can be driven to be mutually close to or mutually far away along the transverse slide column 58 under the action of the screw threads of the transverse screw rod 57, and the two arc-shaped mounting side plates 510 are driven to mutually close to the pump shell 31, and the fixing of the pump shell 31 is achieved.
The side of the installation shell 1 is provided with a tool hole 2 corresponding to the end head of the transverse screw rod 57, so that a matched tool is conveniently inserted into the installation shell 1 through the tool hole 2 to drive the transverse screw rod 57 to rotate.
The pump shell 31 can be positioned after being placed in the installation shell 1 through the positioning component, the opposite displacement control component can control the two arc-shaped installation side plates 510 to be close to each other, the two arc-shaped installation side plates 510 clamp the left side and the right side of the pump shell 31, and the pump shell 31 can be locked after the locking bolts 511 are twisted tightly, so that the pump shell 31 is stably fixed between the two arc-shaped installation side plates 510.
Two clamping holes 36 are respectively formed on two sides of the top of the pump shell 31, and the bottom ends of the two locking bolts 511 are clamped into the two clamping holes 36, so that the pump shell 31 is firmly fixed by the arc-shaped mounting side plates 510.
The locating component comprises a groove 52, a clamping block 53, a locating block 54 and a locating clamping groove 55, the groove 52 is formed in the top of the fixing seat 51, the clamping block 53 is arranged in the middle of the groove 52, the locating block 54 is fixedly connected to the bottom center of the pump shell 31, the bottom of the locating block 54 is clamped into the groove 52, the locating clamping groove 55 clamped with the clamping block 53 is formed in the bottom of the locating block 54, the clamping block 53 is clamped with the locating clamping groove 55 in the bottom of the locating block 54, the position of the pump shell 31 can be accurately installed, and then the pump shell can be stably installed by the arc-shaped installation side plate 510.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A disk tooth type compound centrifugal pump, comprising:
The centrifugal pump body (3) comprises a pump shell (31), fixing screws (32), a pump cover (33) and a water outlet (34), wherein longitudinal sections at the left end and the right end of the pump shell (31) are of semicircular structures, a raised water outlet (34) is arranged in the middle of the upper side of the pump shell (31), and the pump cover (33) is fixedly connected to a front opening of the pump shell (31) through the fixing screws (32);
The composite water pumping mechanism (4) comprises a hollow disc (41), toothed blades (42), centrifugal water gaps (43), water inlet holes (44), water inlet pipes (45), rotating shafts (47) and sealing bearings (49), wherein two longitudinal rotating shafts (47) are respectively connected at the left and right ends of the rear side of a pump shell (31) through the sealing bearings (49) in a rotating mode, the front ends of the two rotating shafts (47) extend to the middle parts of the pump shell (31) and are respectively and fixedly connected with the two hollow discs (41), the toothed blades (42) are arranged on the annular array on the outer periphery of the hollow discs (41), triangular cavities are formed in the toothed blades (42), the triangular cavities are communicated with the inside of the hollow discs (41), the water inlet holes (44) are formed in the middle parts of the front sides of the hollow discs (41), the two water inlet holes (45) are alternately arranged on the pump cover (33), and the rear ends of the two water inlet pipes (45) extend to the middle parts of the two water inlet holes (44) respectively;
And the pump water power mechanism (6) is respectively connected with the rear ends of the two rotating shafts (47), and the pump water power mechanism (6) drives the two rotating shafts (47) to reversely rotate.
2. The disk tooth type compound centrifugal pump as set forth in claim 1, wherein: the compound pump mechanism (4) further comprises a water discharging circular cover (46), the rear ends of the two water inlet pipes (45) are fixedly connected with the two water discharging circular covers (46) respectively, and the water discharging circular covers (46) are rotatably connected with the inner walls of the corresponding water inlet circular holes (44).
3. The disk tooth type compound centrifugal pump as set forth in claim 1, wherein: the compound pump mechanism (4) still includes vortex blade (48), the front end of pivot (47) extends to the interior rear side of hollow dish (41), and the front end of pivot (47) is the toper structure, the front end periphery side of pivot (47) is through the vortex blade (48) and the interior rear side fixed connection of hollow dish (41) that annular array set up, the interior front side wall of hollow dish (41) is around intaking round hole (44) also annular array fixedly connected with vortex blade (48).
4. The disk tooth type compound centrifugal pump as set forth in claim 1, wherein: the centrifugal pump body (3) further comprises a water outlet pipeline (37) and a one-way water outlet valve (38), the top of the water outlet (34) is fixedly connected with the bottom end of the L-shaped water outlet pipeline (37), and the water outlet pipeline (37) is connected with the one-way water outlet valve (38) in series.
5. The disk tooth type compound centrifugal pump as set forth in claim 1, wherein: the centrifugal pump body (3) further comprises a guide block (35), and the center of the inner bottom of the pump shell (31) is provided with a triangular guide block (35).
6. The disk tooth type compound centrifugal pump as set forth in claim 1, wherein: the water diversion device also comprises a water diversion mechanism (7), wherein two interfaces at the rear end of the water diversion mechanism (7) are respectively connected with the front ends of two water inlet pipes (45).
7. The disk tooth type compound centrifugal pump as set forth in claim 6, wherein: the water filter device also comprises a water filter mechanism (8), wherein the rear end of the water filter mechanism (8) is fixedly connected with an interface at the front end of the water distribution mechanism (7).
8. The disk tooth type compound centrifugal pump as set forth in claim 1, wherein: the novel pump further comprises a mounting shell (1) and a pump body mounting mechanism (5), wherein the inner bottom of the mounting shell (1) is fixedly connected with a pump shell (31) through the pump body mounting mechanism (5).
9. The disk tooth type compound centrifugal pump as set forth in claim 8, wherein: the pump body installation mechanism (5) comprises a fixed seat (51), arc installation side plates (510), locking bolts (511) and a positioning assembly, the fixed seat (51) is fixedly connected to the inner bottom of the installation shell (1), the fixed seat (51) is connected with the bottom of the pump shell (31) in a clamping mode through the positioning assembly, the side faces of the fixed seat (51) are connected with the bottoms of the two arc installation side plates (510) through opposite displacement control assemblies, the two arc installation side plates (510) are respectively located on the left side and the right side of the pump shell (31), and the locking bolts (511) are respectively connected in top screw holes of the two arc installation side plates (510) in a threaded mode.
10. The disk tooth type compound centrifugal pump as set forth in claim 9, wherein: the positioning assembly comprises a groove (52), a clamping block (53), a positioning block (54) and a positioning clamping groove (55), wherein the groove (52) is formed in the top of the fixing seat (51), the clamping block (53) is arranged in the middle of the groove (52), the positioning block (54) is fixedly connected to the center of the bottom of the pump shell (31), the bottom of the positioning block (54) is clamped into the groove (52), and the positioning clamping groove (55) connected with the clamping block (53) in a clamping mode is formed in the bottom of the positioning block (54).
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| CN202410408648.6A CN117989136B (en) | 2024-04-07 | 2024-04-07 | Disc tooth type composite centrifugal pump |
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| CN202410408648.6A CN117989136B (en) | 2024-04-07 | 2024-04-07 | Disc tooth type composite centrifugal pump |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE630647A (en) * | ||||
| GB262292A (en) * | 1926-01-25 | 1926-12-09 | Shosaku Morita | Improvements in gear pumps |
| FR1292057A (en) * | 1961-06-13 | 1962-04-27 | Plessey Co Ltd | Rotary pump |
| CH528018A (en) * | 1970-05-27 | 1972-09-15 | Masag Ag | centrifugal pump |
| US4815930A (en) * | 1988-04-22 | 1989-03-28 | Sundstrand Corporation | Cavitating centrifugal pump |
| JPH1061594A (en) * | 1996-08-14 | 1998-03-03 | Nishiei Tekkosho:Kk | Structure of impeller and pump |
| CN2395063Y (en) * | 1999-07-28 | 2000-09-06 | 方启华 | Composite screw pump |
| WO2005054680A1 (en) * | 2003-12-04 | 2005-06-16 | Beijing Benran S&T Co., Ltd. | Centrifugal pump |
| CN101235823A (en) * | 2007-12-21 | 2008-08-06 | 王波俊 | Centrifugal pump blade wheel-free hollow screw axis |
| US20150308446A1 (en) * | 2014-04-23 | 2015-10-29 | c/o Sulzer Management AG | Impeller for a centrifugal pump, a centrifugal pump and a use thereof |
| US20190350232A1 (en) * | 2016-06-03 | 2019-11-21 | Gea Tds Gmbh | Method and installation for the treatment of heat-sensitive food products, and centrifugal pump for an installationof said type |
| DE202019105788U1 (en) * | 2019-06-06 | 2019-11-21 | Suzhou He Er Bai Si Pump Co., Ltd. | Combined centrifugal impeller |
| CN111734602A (en) * | 2020-07-08 | 2020-10-02 | 河南工学院 | Self-priming centrifugal pump capable of treating gas-liquid mixed medium |
| CN217270848U (en) * | 2021-12-15 | 2022-08-23 | 武汉和安昌机械设备有限公司 | Axial self-balancing parallel multistage centrifugal pump |
| CN116892518A (en) * | 2023-09-08 | 2023-10-17 | 成都理工大学 | Multistage disc pump |
| CN117329127A (en) * | 2023-12-01 | 2024-01-02 | 成都理工大学 | Sliding vane type and centrifugal type combined compression machine |
-
2024
- 2024-04-07 CN CN202410408648.6A patent/CN117989136B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE630647A (en) * | ||||
| GB262292A (en) * | 1926-01-25 | 1926-12-09 | Shosaku Morita | Improvements in gear pumps |
| FR1292057A (en) * | 1961-06-13 | 1962-04-27 | Plessey Co Ltd | Rotary pump |
| CH528018A (en) * | 1970-05-27 | 1972-09-15 | Masag Ag | centrifugal pump |
| US4815930A (en) * | 1988-04-22 | 1989-03-28 | Sundstrand Corporation | Cavitating centrifugal pump |
| JPH1061594A (en) * | 1996-08-14 | 1998-03-03 | Nishiei Tekkosho:Kk | Structure of impeller and pump |
| CN2395063Y (en) * | 1999-07-28 | 2000-09-06 | 方启华 | Composite screw pump |
| WO2005054680A1 (en) * | 2003-12-04 | 2005-06-16 | Beijing Benran S&T Co., Ltd. | Centrifugal pump |
| CN101235823A (en) * | 2007-12-21 | 2008-08-06 | 王波俊 | Centrifugal pump blade wheel-free hollow screw axis |
| US20150308446A1 (en) * | 2014-04-23 | 2015-10-29 | c/o Sulzer Management AG | Impeller for a centrifugal pump, a centrifugal pump and a use thereof |
| US20190350232A1 (en) * | 2016-06-03 | 2019-11-21 | Gea Tds Gmbh | Method and installation for the treatment of heat-sensitive food products, and centrifugal pump for an installationof said type |
| DE202019105788U1 (en) * | 2019-06-06 | 2019-11-21 | Suzhou He Er Bai Si Pump Co., Ltd. | Combined centrifugal impeller |
| CN111734602A (en) * | 2020-07-08 | 2020-10-02 | 河南工学院 | Self-priming centrifugal pump capable of treating gas-liquid mixed medium |
| CN217270848U (en) * | 2021-12-15 | 2022-08-23 | 武汉和安昌机械设备有限公司 | Axial self-balancing parallel multistage centrifugal pump |
| CN116892518A (en) * | 2023-09-08 | 2023-10-17 | 成都理工大学 | Multistage disc pump |
| CN117329127A (en) * | 2023-12-01 | 2024-01-02 | 成都理工大学 | Sliding vane type and centrifugal type combined compression machine |
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| CN117989136B (en) | 2024-05-28 |
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