WO2021184592A1 - 一种永磁直驱式气膜减阻渣浆泵 - Google Patents

一种永磁直驱式气膜减阻渣浆泵 Download PDF

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Publication number
WO2021184592A1
WO2021184592A1 PCT/CN2020/099861 CN2020099861W WO2021184592A1 WO 2021184592 A1 WO2021184592 A1 WO 2021184592A1 CN 2020099861 W CN2020099861 W CN 2020099861W WO 2021184592 A1 WO2021184592 A1 WO 2021184592A1
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WIPO (PCT)
Prior art keywords
permanent magnet
main shaft
blade
motor
gas film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/099861
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English (en)
French (fr)
Inventor
谢方伟
方树鹏
田祖织
沈刚
朱真才
张海防
李洪磊
徐纯洁
周万才
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Shandong Zhangqiu Blower Co Ltd
Original Assignee
China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
Shandong Zhangqiu Blower Co Ltd
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Publication date
Application filed by China University of Mining and Technology CUMT, China University of Mining and Technology Beijing CUMTB, Shandong Zhangqiu Blower Co Ltd filed Critical China University of Mining and Technology CUMT
Priority to US17/425,334 priority Critical patent/US11371522B2/en
Priority to CA3125071A priority patent/CA3125071C/en
Priority to AU2020426866A priority patent/AU2020426866B2/en
Publication of WO2021184592A1 publication Critical patent/WO2021184592A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2294—Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0613—Special connection between the rotor compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0646—Units comprising pumps and their driving means the pump being electrically driven the hollow pump or motor shaft being the conduit for the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • 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
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
    • F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
    • 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
    • F04D29/20—Mounting rotors on shafts
    • 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
    • F04D29/2205—Conventional flow pattern
    • 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
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F04D29/245—Geometry, shape for special effects
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F04D29/286—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors multi-stage rotors
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/688—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers 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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters

Definitions

  • the invention relates to the field of slurry pumps, in particular to a permanent magnet direct-drive gas film drag reduction slurry pump.
  • Slurry pump is a kind of impurity pump that conveys solid-liquid two-phase flow. Due to the existence of solid particles, its efficiency is generally lower than that of clean water pumps, especially when conveying high-concentration particles and corrosive slurry. High-speed rotation, solid particles impact the blades with high frequency, and the slurry washes and corrodes the walls of the flow-through components, causing the impeller to wear, reduce efficiency, and even fail.
  • the gas film drag reduction theory by changing the flow field on the wall, forms a gas film-water mixed layer on the wall, which greatly reduces the fluid resistance, and the existence of the film reduces the height of solid particles. Frequent impact, as well as corrosion and wear of the slurry.
  • Chinese patent application CN109185223A published "a bionic design method for centrifugal pumps with drag reduction and noise reduction performance”. A number of shark-like V-shaped grooves and V-shaped groove structures are set on the blade working surface of the impeller near the blade exit. The design can effectively reduce the working resistance of the impeller and improve the working efficiency of the centrifugal pump; Chinese patent application CN103195744A published "a low specific speed impeller with groove drag reduction” manufactured on the pressure surface and suction surface of the blade by machining or casting methods A series of grooves to reduce the loss of turbulent kinetic energy on the surface of the impeller.
  • the purpose of the present invention is to provide a permanent magnet direct-drive gas film drag reduction slurry pump, which is small in size, high in efficiency, and strong in abrasion resistance.
  • the present invention adopts the following technical solutions:
  • the present invention provides a permanent magnet direct-drive gas film drag reduction slurry pump, which includes a motor housing with a motor front cover and a motor rear cover at the front and rear ends, respectively, and the front end of the motor housing is also fixed with a pump body and A pressurized water chamber is formed between the pump body and the motor front cover, a rotatable main shaft is arranged between the motor front cover and the motor rear cover, and the main shaft is provided with a front and back through air flow channel, and the outer wall of the middle end is from A rotor iron core and a permanent magnet are nested from the inside to the outside.
  • the inner wall of the motor housing is provided with a stator iron core corresponding to the rotor iron core.
  • Both ends of the stator iron core are respectively provided with stator windings.
  • the front end extends into the pressurized water chamber and is screw-fixed with the impeller of the pump body.
  • the rear end surface of the main shaft extends out of the rear cover of the motor.
  • the inner thread of the threaded hole is fixed with a valve block that divides it into a first air chamber and a second air chamber.
  • a number of uniformly distributed blades are provided on the side of the rear cover plate close to the main shaft, and the blades are provided with mutual communication
  • the rear The cover plate is also provided with a plurality of third exhaust holes penetrating the blade air inlet and the first air chamber, and the pump body and the rear end of the motor housing are both fixed on the frame.
  • the valve block includes a block body with a T-shaped through hole penetrating back and forth in the middle of the block body, and a three-way pipe adapted and slidable is provided in the T-shaped through hole.
  • a spring support is fixed at the front port of the through hole, a spring is fixedly connected between the spring support and the three-way pipe, and a valve port is opened in the middle of the spring support.
  • the back end of the T-shaped through hole is also provided with a slidable valve core.
  • the arc-shaped cap that covers the port of the airflow channel in the spindle.
  • the front end of the main shaft is rotatably connected to the front cover of the motor through a first sleeve and a first bearing
  • the rear end of the main shaft is rotatably connected to the rear cover of the motor through a first sleeve and the first bearing.
  • an insert rod is threadedly fixed at one end of the blade air inlet close to the rear cover, the insert rod is provided with a hollow insert rod air passage, and the end of the insert rod away from the blade air inlet is covered with a rubber sleeve and is embedded corresponding to it. In the third vent hole.
  • the first exhaust port and the second exhaust port are arranged at the positions of the front edges of two adjacent blades.
  • the blade exhaust passage is arranged at the front edge of the pressure of the blade, and a plurality of rows of hemispherical pits are provided from the middle section to the trailing edge of the blade.
  • a plurality of blade jet ports are provided on the exhaust duct.
  • the bottom end surface of the blade is provided with a boss
  • the rear cover plate is provided with a T-shaped groove adapted to the boss
  • the rear cover plate is also provided with a plurality of blades for axially fixing the blades. Mounting holes.
  • the number of blades in question is 5-8.
  • the air outlets of the first exhaust port and the second exhaust port are both arranged at the hub of the cover plate and arranged in two layers inside and outside. The flow path between the blades.
  • the permanent magnet motor and the slurry pump are coaxially designed, which reduces the size of the whole machine, simplifies the structure, and reduces energy consumption.
  • Figure 1 is a two-dimensional diagram of a permanent magnet direct-drive gas film drag reduction slurry pump according to an embodiment of the present invention
  • FIG. 2 is a partial enlarged view of the end of the main shaft according to the embodiment of the present invention.
  • Figure 3 is a partial enlarged view of the valve block of the embodiment of the present invention.
  • Figure 4 is a half-sectional view of the impeller of the embodiment of the present invention.
  • Figure 5 is a partial enlarged view of the plunger of the embodiment of the present invention.
  • Figure 6 is a three-dimensional top view of the rear cover of the embodiment of the present invention.
  • Fig. 7 is a three-dimensional view of a blade according to an embodiment of the present invention.
  • Fig. 8 is a three-dimensional view of an impeller according to an embodiment of the present invention.
  • a permanent magnet direct-drive gas film drag reduction slurry pump includes a motor housing 3 with a motor front cover 14 and a motor rear cover 10 at the front and rear ends, respectively.
  • the motor housing The front end of 3 is also fixed with a pump body 1 and a pressurized water chamber is formed between the pump body 1 and the motor front cover 14, and a rotatable spindle 9 is provided between the motor front cover 14 and the motor rear cover 10, so
  • the main shaft 9 is provided with an airflow channel 8 that penetrates back and forth, and a rotor core 7 and a permanent magnet 6 are successively nested on the outer wall of its end from the inside to the outside.
  • the inner wall of the motor housing 3 is provided with a corresponding rotor core 7
  • the stator core 5 is provided with stator windings 4 at both ends of the stator core 5, and the front end of the main shaft 9 extends into the pressurized water chamber and is screwed to the impeller 2 of the pump body 1.
  • the end surface protrudes out of the motor rear cover 10, and the rear end of the air flow channel 8 is used as the air inlet 11.
  • the rear cover 13 of the impeller 2 is provided with a threaded hole that is threadedly matched with the front end of the main shaft 9, and the threaded hole is fixed with internal threads.
  • the rear cover 13 is provided with five uniformly distributed blades 2-1 on the side close to the main shaft 9.
  • the blades 2- 1 is provided with a blade inlet 36 and a plurality of blade exhaust channels 37 communicating with each other, and a plurality of first air outlets respectively penetrating through the first air chamber 22 and the pressurized water chamber are opened in the rear cover plate 13 20 and the second exhaust port 21, the rear cover plate 13 is also provided with a number of third exhaust holes 32 penetrating the blade inlet 36 and the first air chamber 22, the pump body 1 and the motor
  • the rear end of the housing 3 is fixed on the frame 17.
  • the front cover plate 12 and the rear cover plate 13 are cast, and the front cover plate 12 is welded to the blade 2-1 by welding to ensure the overall structural stability of the impeller 2.
  • the valve block 23 includes a block body with a T-shaped through hole penetrating forward and backward in the middle of the block body.
  • a spring support 29 is fixed at the port in front of the hole, a spring 25 is fixedly connected between the spring support 29 and the tee 30, and a valve port 24 is opened in the middle.
  • the end of the valve core 31 away from the tee 30 is provided with an arc-shaped cap that can cover the port of the airflow channel 8 in the main shaft 9; the arc-shaped cap pushes the tee 30 and compresses the spring 25 under the action of the gas pressure in the airflow channel 8 , So as to connect the three air holes 26 with the L-shaped air passage 27, and then connect the first air reservoir 22 and the second air reservoir 28; this structure can effectively control the discharge of gas and prevent the liquid from entering the shaft.
  • the front end of the main shaft 9 is rotatably connected to the motor front cover 14 through a first shaft sleeve 16 and a first bearing 15, and the rear end of the main shaft 9 is rotatably connected to the motor rear cover 10 through a first shaft sleeve 18 and a first bearing 19.
  • the plunger 34 is provided with a hollow plunger air channel 35 and its end far away from the blade air inlet 36 is covered with a rubber sleeve 33. And embedded in the corresponding third exhaust hole 32, the blade 2-1 is tightly connected to the rear cover 13 through the rubber sleeve 33, and the plunger air passage 35 can connect the blade air inlet 36 with the first air chamber I 22
  • the plunger 34 effectively ensures that the gas can fully enter the blade exhaust passage, and the installation is simple.
  • the first exhaust port 20 and the second exhaust port 21 are arranged at the positions of the front edges of two adjacent blades.
  • the blade exhaust passage 37 is set at the front edge of the pressure of the blade 2-1, and the middle section to the trailing edge of the blade 2-1 is provided with a plurality of rows of hemispherical pits 39.
  • the pressure effect helps to further reduce the resistance of the blade 2-1.
  • the exhaust duct 37 is provided with a plurality of blade jet ports 38, which can ensure the coverage of the gas on the blade 2-1 and make the gas more uniformly covered on the blade 2-1.
  • the bottom end of the blade 2-1 is provided with a boss 42, the rear cover plate 13 is provided with a T-shaped groove 40 adapted to the boss 42, and the rear cover plate 13 is also provided with a number of The mounting hole 41 of the blade 2-1 is fixed in the axial direction.
  • the slurry When working, under the action of centrifugal force, the slurry fills the entire flow passage and is continuously thrown out. At this time, the gas is respectively discharged from the first exhaust port 20 and the second exhaust port 21 and covers the rear cover 13 close to the flow passage. On the side wall surface, gas is ejected from the multiple blade jet ports 38 and covers the pressure surface of the blade 2-1 to form a layer of gas film. Due to the existence of the gas film, the slurry is isolated from the wall surface and the flow field near the wall is changed. In turn, the viscous resistance of the fluid is reduced, the friction and wear of the blade 2-1 are reduced, and the slurry conveying efficiency is improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种永磁直驱式气膜减阻渣浆泵，包括永磁电机、主轴（9）、叶轮（2）、阀块（23）；其中，永磁电机包括电机外壳（3）、定子铁芯（5）、定子绕组（4）、转子铁芯（7）和永磁铁（6），转子铁芯（7）和叶轮（2）共用主轴（9），主轴（9）内设有气流通道（8）；叶轮（2）包括前盖板（12）、后盖板（13）、叶片（2-1），叶片（2-1）为模块化制造，并在压力面设有叶片喷气口（38）和半球体凹坑（39），主轴（9）内的气流通道（8）与叶片喷气口（38）相连通，并在主轴（9）末端位置设置阀块（23），以控制气体排出和防止液体进入主轴（9）内；体积小、效率高，抗磨性强。

Description

一种永磁直驱式气膜减阻渣浆泵 技术领域
本发明涉及浆泵领域，具体涉及一种永磁直驱式气膜减阻渣浆泵。
背景技术
中国是渣浆泵生产和消耗大国，渣浆泵的工作环境导致其过流部件损耗严重，并且国产渣浆泵效率普遍低于国外产品，每年造成了大量经济损失和能源损耗。因此，为了改善这一状况，有必要提出一种新的解决方案。
渣浆泵是输送固液两相流的一种杂质泵，因固体颗粒的存在，相对于清水泵来说效率普遍较低，尤其在输送高浓度颗粒及含有腐蚀性浆体时，随着叶轮高速旋转，固体颗粒对叶片进行着高频冲击，浆体对过流部件壁面进行冲刷、腐蚀，造成叶轮的磨损、效率降低，甚至失效。而气膜减阻理论，通过改变壁面的流场，在壁面形成一层气膜—水的混合层，极大的减小了流体阻力，并且因膜层的存在，减小了固体颗粒的高频冲击，以及浆体的腐蚀磨损。中国专利申请CN109185223A公布了“一种使离心泵具有减阻降噪性能的仿生设计方法”，在叶轮的叶片工作面上靠近叶片出口处设置多个类鲨鱼表皮的V型槽,V型槽结构设计能够有效降低叶轮工作阻力,提高离心泵工作效率；中国专利申请CN103195744A公布了“一种具有沟槽减阻的低比转数叶轮”通过加工或者铸造的方法在叶片压力面、吸力面上制造一系列的沟槽，从而减少叶轮表面的湍动能损失。上述两种方案均能够减少叶轮的工作阻力，但是伴随渣浆泵工况的变化，沟槽位置、大小等参数无法随时适应变化的工况，造成其在叶轮减阻增效上有很大的局限性，并且不具备抗浆体腐蚀功能。
发明内容
针对上述存在的技术不足，本发明的目的是提供一种永磁直驱式气膜减阻渣浆泵，其体积小、效率高，抗磨性强。
为解决上述技术问题，本发明采用如下技术方案：
本发明提供一种永磁直驱式气膜减阻渣浆泵，包括前端和后端分别设有电机前盖和电机后盖的电机外壳，所述电机外壳的前端还固定有泵体并且所述泵体与电机前盖之间形成有压水室，所述电机前盖与电机后盖之间设置有能够转动的主轴，所述主轴内部开有前后贯通的气流通道并且其中端外壁上从内到外依次嵌套有转子铁芯和永磁铁，所述电机外壳的内壁上设有与转子铁芯对应的定子铁芯，所述定子铁芯两端分别设有定子绕组,所述主轴的前端伸入压水室内并与所述泵体的叶轮螺纹固定，所述主轴后端面伸出电机后盖外，所述叶轮的后盖板上开有与主轴前端螺纹配合的螺纹孔，所述螺纹孔内螺纹固定有将其分为第一气仓和第二气仓的阀块，所述后盖板靠近主轴的侧面上设有若干个均布的叶片，所述叶片上设有相互连通的叶片进气道和若干个叶片排气道，所述后盖板内还开有若干个分别贯通第一气仓和压水室的第一排气口和第二排气口，所述后盖板上还开有若干个贯通叶片进气道和第一气仓的第三排气孔，所述泵体与所述电机外壳的后端均固定在机架上。
优选地，所述阀块包括块体，所述块体中部开有前后贯通的T型通孔，所述T型通孔内设有与其适配并且能够滑动的三通管，所述T型通孔前端口固定有弹簧支座，所述弹簧支座与三通管之间固定连接有弹簧并且其中部开有阀口，所述三通管内开有三通气孔，所述块体内开有两个上下对称并分别连通三通气孔与第二气仓的L型气道，所述T型通孔后端还设有能够滑动的阀芯，所述阀芯远离三通管的一端设有能够盖住主轴内气流通道端口的弧形帽。
优选地，所述主轴前端通过第一轴套、第一轴承与电机前盖转动连接，所述主轴后端通过第一轴套、第一轴承与电机后盖转动连接。
优选地，所述叶片进气道靠近后盖板的一端螺纹固定有插杆，所述插杆内设中空的插杆气道并且其远离叶片进气道的一端套有橡胶套并嵌入与其对应的第三排气孔内。
优选地，所述第一排气口、第二排气口设在相邻两叶片前缘位置。
优选地，所述叶片排气道设置在叶片压力面前缘位置，所述叶片中段至尾缘设有若干列半球体凹坑。
优选地，所述排气道上设有若干个叶片喷气口。
优选地，所述叶片底端面设有凸台，所述后盖板上设有与所述凸台适配的T型槽，所述后盖板上还开有若干个用于轴向固定叶片的安装孔。
优选地，所诉叶片的数量为5-8个。
优选地，所述第一排气口和所述第二排气口的出气口均设在盖板轮毂处并呈内外两层布置，两层出气口周向均布在轮毂上并正对相邻两叶片之间的流道。
本发明的有益效果在于：
1将永磁电机与渣浆泵共轴设计，缩小了整机的尺寸，简化了结构，降低了能耗。
2采用组装式叶轮，对叶片进行模块化设计制造，更有利于叶轮的拆卸维修，也利于叶片气流通道的合理布设。
3将气膜减阻理论应用到渣浆泵的减阻增效和减磨防腐上，对渣浆泵的性能和寿命有极大的提升。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例的一种永磁直驱式气膜减阻渣浆泵二维图；
图2为本发明实施例的主轴末端局部放大图；
图3为本发明实施例的阀块局部放大图；
图4为本发明实施例的叶轮半剖图；
图5为本发明实施例的插杆局部放大图；
图6为本发明实施例的后盖板三维俯视图；
图7为本发明实施例的叶片三维视图；
图8为本发明实施例的叶轮三维视图。
附图标记说明：
1—泵体，2—叶轮，2-1-叶轮，3—电机外壳，4—定子绕组，5—定子铁芯，6—永磁铁，7—转子铁芯，8—气流通道，9—主轴，10—电机后盖，11—进气口，12—前盖板，13—后盖板，14—电机前盖，15—第一轴承，16—第一轴套，17—机架，18—第二轴套，19—第二轴承，20—第一排气口，21—第二排气口，22—第一气仓，23—阀块，24—阀口，25—弹簧，26—三通气孔，27—L型气道，28—第二气仓，29—弹簧支座，30—三通管，31—阀芯，32—第三排气孔，33—橡胶套，34—插杆，35—插杆气道，36—叶片进气道，37—叶片排气道，38—叶片喷气口，39—半球体凹坑，40—T型槽，41—安装孔，42—凸台。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1至图8所示，一种永磁直驱式气膜减阻渣浆泵，包括前端和后端分别设有电机前盖14和电机后盖10的电机外壳3，所述电机外壳3的前端还固定有泵体1并且所述泵体1与电机前盖14之间形成有压水室，所述电机前盖14与电机后盖10之间设置有能够转动的主轴9，所述主轴9内部开有前后贯通的气流通道8并且其中端外壁上从内到外依次嵌套有转子铁芯7和永磁铁6，所述电机外壳3的内壁上设有与转子铁芯7对应的定子铁芯5，所述定子铁芯5两端分别设有定子绕组4,所述主轴9的前端伸入压水室内并与所述泵体1的叶轮2螺纹固定，所述主轴9后端面伸出电机后盖10外，将气流通道8最后端作为进气口11，所述叶轮2的后盖板13上开有与主轴9前端螺纹配合的螺纹孔，所述螺纹孔内螺纹固定有将其分为第一气仓22和第二气仓28的阀块23，所述后盖板13靠近主轴9的侧面上设有5个均布的叶片2-1，所述叶片2-1上设有相互连通的叶片进气道36和若干个叶片排气道37，所述后盖板13内还开有若干个分别贯通第一气仓22和压水室的第一排气口20和第二排气口21，所述后盖板13上还开有若干个贯通叶片进气道36和第一气仓22的第三排气孔32，所述泵体1与所述电机外壳3的后端均固定在机架17上。所述前盖板12与后盖板13铸造而成，并将前盖板12采用焊接的方式焊接在叶片2-1上，确保叶轮2整体的结构稳定性。
所述阀块23包括块体，所述块体中部开有前后贯通的T型通孔，所述T型通孔内设有与其适配并且能够滑动的三通管30，所述T型通孔前端口固定有弹簧支座29，所述弹簧支座29与三通管30之间固定连接有弹簧25并且其中部开有阀口24，所述三通管30内开有三通气孔26，所述块体内开有两个上下对称并分别连通三通气孔26与第二气仓28的L型气道27，所述T型通孔后端还设有能够滑动的阀芯31，所述阀芯31远离三通管30的一端设有能够盖住主轴9内气流通道8端口的弧形帽；弧形帽在气流通道8内的气体压力作用下，推动三通管30并压缩弹簧25，从而将三通气孔26与L型气道27连通，进而将第一气仓22和第二气仓28连通；通过这种结构能够有效控制气体的排出和防止液体进入轴内。
所述主轴9前端通过第一轴套16、第一轴承15与电机前盖14转动连接，所述主轴9后端通过第一轴套18、第一轴承19与电机后盖10转动连接。
所述叶片进气道36靠近后盖板13的一端螺纹固定有插杆34，所述插杆34内设中空 的插杆气道35并且其远离叶片进气道36的一端套有橡胶套33并嵌入与其对应的第三排气孔32内，通过橡胶套33将叶片2-1紧密连接在后盖板13上，插杆气道35能够将叶片进气道36与第一气仓Ⅰ22连通；插杆34有效保证了气体能够充分进入叶片排气道内，并且安装简单。
所述第一排气口20、第二排气口21设在相邻两叶片前缘位置。
所述叶片排气道37设置在叶片2-1压力面前缘位置，所述叶片2-1中段至尾缘设有多列半球体凹坑39，气膜流经半球体凹坑39时产生动压效果，有助于进一步减小叶片2-1阻力。
所述排气道37上设有多个叶片喷气口38，可以确保气体在叶片2-1上的覆盖范围以及使气体更加均匀的覆盖在叶片2-1上。
所述叶片2-1底端面设有凸台42，所述后盖板13上设有与所述凸台42适配的T型槽40，所述后盖板13上还开有若干个用于轴向固定叶片2-1的安装孔41。
工作时，在离心力的作用下，浆体充满整个流道并不断被甩出，此时，气体分别从第一排气口20、第二排气口21排出并覆盖后盖板13靠近流道侧壁面，气体从多个叶片喷气口38喷出并覆盖在叶片2-1压力面上并形成一层气膜，因气膜的存在，使浆体与壁面隔绝，改变了近壁面流场，进而降低了流体的粘性阻力，减小了叶片2-1的摩擦磨损，提高了浆体输送效率。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (10)

  1. 一种永磁直驱式气膜减阻渣浆泵，其特征在于，包括前端和后端分别设有电机前盖(14)和电机后盖(10)的电机外壳(3)，所述电机外壳(3)的前端还固定有泵体(1)并且所述泵体(1)与电机前盖(14)之间形成有压水室，所述电机前盖(14)与电机后盖(10)之间设置有能够转动的主轴(9)，所述主轴(9)内部开有前后贯通的气流通道(8)并且其中端外壁上从内到外依次嵌套有转子铁芯(7)和永磁铁(6)，所述电机外壳(3)的内壁上设有与转子铁芯(7)对应的定子铁芯(5)，所述定子铁芯(5)两端分别设有定子绕组(4),所述主轴(9)的前端伸入压水室内并与所述泵体(1)的叶轮(2)螺纹固定，所述主轴(9)后端面伸出电机后盖(10)外，所述叶轮(2)的后盖板(13)上开有与主轴(9)前端螺纹配合的螺纹孔，所述螺纹孔内螺纹固定有将其分为第一气仓(22)和第二气仓(28)的阀块(23)，所述后盖板(13)靠近主轴(9)的侧面上设有若干个均布的叶片(2-1)，所述叶片(2-1)上设有相互连通的叶片进气道(36)和若干个叶片排气道(37)，所述后盖板(13)内还开有若干个分别贯通第一气仓(22)和压水室的第一排气口(20)和第二排气口(21)，所述后盖板(13)上还开有若干个贯通叶片进气道(36)和第一气仓(22)的第三排气孔(32)，所述泵体(1)与所述电机外壳(3)的后端均固定在机架(17)上。
  2. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述阀块(23)包括块体，所述块体中部开有前后贯通的T型通孔，所述T型通孔内设有与其适配并且能够滑动的三通管(30)，所述T型通孔前端口固定有弹簧支座(29)，所述弹簧支座(29)与三通管(30)之间固定连接有弹簧(25)并且其中部开有阀口(24)，所述三通管(30)内开有三通气孔(26)，所述块体内开有两个上下对称并分别连通三通气孔(26)与第二气仓(28)的L型气道(27)，所述T型通孔后端还设有能够滑动的阀芯(31)，所述阀芯(31)远离三通管(30)的一端设有能够盖住主轴(9)内气流通道(8)端口的弧形帽。
  3. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述主轴(9)前端通过第一轴套(16)、第一轴承(15)与电机前盖(14)转动连接，所述主轴(9)后端通过第一轴套(18)、第一轴承(19)与电机后盖(10)转动连接。
  4. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述叶片进气道(36)靠近后盖板(13)的一端螺纹固定有插杆(34)，所述插杆(34)内设中空的插杆气道(35)并且其远离叶片进气道(36)的一端套有橡胶套(33)并嵌入与其对应的第三排气孔(32)内。
  5. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述第一排气口(20)、第二排气口(21)设在相邻两叶片前缘位置。
  6. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述叶片排气道(37)设置在叶片(2-1)压力面前缘位置，所述叶片(2-1)中段至尾缘设有若干列半球体凹坑(39)。
  7. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述排气道(37)上设有若干个叶片喷气口(38)。
  8. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述叶片(2-1)底端面设有凸台(42)，所述后盖板(13)上设有与所述凸台(42)适配的T型槽(40)，所述后盖板(13)上还开有若干个用于轴向固定叶片(2-1)的安装孔(41)。
  9. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述叶片(2-1)的数量为5-8个。
  10. 如权利要求1所述的一种永磁直驱式气膜减阻渣浆泵，其特征在于，所述第一排气口(20)和所述第二排气口(21)的出气口均设在盖板13轮毂处并呈内外两层布置，两层出气口周向均布在轮毂上并正对相邻两叶片(2-1)之间的流道。
PCT/CN2020/099861 2020-03-20 2020-07-02 一种永磁直驱式气膜减阻渣浆泵 Ceased WO2021184592A1 (zh)

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