WO2021227262A1 - Permanent magnet direct drive slurry pump having water cooling circulation structure - Google Patents

Permanent magnet direct drive slurry pump having water cooling circulation structure Download PDF

Info

Publication number
WO2021227262A1
WO2021227262A1 PCT/CN2020/106924 CN2020106924W WO2021227262A1 WO 2021227262 A1 WO2021227262 A1 WO 2021227262A1 CN 2020106924 W CN2020106924 W CN 2020106924W WO 2021227262 A1 WO2021227262 A1 WO 2021227262A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
water
cooling
slurry pump
water tank
Prior art date
Application number
PCT/CN2020/106924
Other languages
French (fr)
Chinese (zh)
Inventor
方树鹏
谢方伟
李洪磊
田祖织
朱真才
吕科延
徐纯洁
邵焕
Original Assignee
山东省章丘鼓风机股份有限公司
中国矿业大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 山东省章丘鼓风机股份有限公司, 中国矿业大学 filed Critical 山东省章丘鼓风机股份有限公司
Publication of WO2021227262A1 publication Critical patent/WO2021227262A1/en

Links

Images

Classifications

    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • 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
    • F04D29/58—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
    • 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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the invention relates to the technical field of slurry pumps, in particular to a permanent magnet direct-drive slurry pump with a water-cooled circulation structure.
  • slurry pumps are widely used in coal mines, petrochemicals, electric power, metallurgy, and building materials industries.
  • the commonly used slurry pumps are driven by intermediate transmission devices such as motors, couplings or pulleys, which have the disadvantages of complex structure, large volume, low efficiency, and high energy consumption.
  • the permanent magnet synchronous motor is used to directly drive the load, which avoids the shortcomings of traditional driving methods and greatly improves the efficiency of mechanical transmission.
  • the permanent magnet direct drive system is mainly used in technical fields such as wind power generation and mining material transportation, and it is rarely applied in the field of slurry pump technology.
  • the driving motor is affected by factors such as time, power, load, etc., which will generate heat during the operation. A large amount of heat will cause magnetic degradation of the permanent magnets inside the motor, which will affect the drive performance of the motor. Therefore, it is necessary to design a cooling structure to cool the motor.
  • the Chinese patent with publication number CN206917864U discloses a slurry pump and its motor cooling device.
  • the motor is air-cooled by a blower connected to a cooling cover. This method increases the working space and energy consumption of the slurry pump.
  • the Chinese patent with publication number CN209228641U discloses a slurry pump that is easy to dissipate heat. It adopts a multi-stage transmission structure and uses a fan to cool the cooling water to realize the heat dissipation of the overall structure of the slurry pump.
  • the slurry pump has many parts, complex structure, and This method can only achieve partial heat dissipation of the motor and the bearing box, and the cooling effect is not good.
  • the present invention provides a permanent magnet direct drive slurry pump with a water-cooled circulation structure.
  • the disadvantages of the existing slurry pump, such as complex structure, low transmission efficiency, and high energy consumption, are solved, and the purpose of the water cooling cycle of the driving motor is realized, and the structure has the function of assisting in offsetting the axial force.
  • the permanent magnet direct-drive slurry pump with a water-cooled circulation structure includes a pump body, a permanent magnet synchronous motor, and a cooling water tank.
  • the pump body is synchronized with the permanent magnet.
  • the motor is directly installed and connected, sharing a single shaft;
  • the permanent magnet synchronous motor also includes a built-in coolant drive device, the built-in coolant drive device is installed in the motor housing of the permanent magnet synchronous motor, the cooling water tank and the built-in coolant drive device,
  • the cooling liquid channel provided in the motor housing forms a cooling circulation channel.
  • the motor housing is provided with a water inlet, a spiral water channel and a water outlet.
  • the spiral water channel is spirally arranged in the motor housing, and the water inlet, the spiral water channel and the water outlet form a coolant channel.
  • the built-in cooling liquid driving device includes: a cavity cover and an embedded cavity; the embedded cavity is connected internally; The cavities are connected, and the water outlet pipe is connected out of the water outlet hole and leads into the cooling water tank.
  • the upper end of the embedded cavity is provided with a small hole, the small hole and the water inlet hole are equal in diameter and communicate with the inside of the embedded cavity and the spiral water channel.
  • the built-in coolant driving device further includes a small impeller, and a small impeller is arranged in the embedded cavity, and the small impeller is connected to the end of the shaft through a flat key.
  • a partition plate I and a partition plate II are arranged inside the cooling water tank, and the partition plate I and the partition plate II are arranged staggered up and down, and two sets of fans are arranged at the rear end of the cooling water tank.
  • the cooling water tank is provided with a temperature sensor for monitoring and feeding back the water temperature of the water inlet pipe, and intelligently controlling the start and stop of the two sets of fans.
  • the permanent magnet synchronous motor and the slurry pump are an integrated structure, and the two share the same shaft, eliminating the need for coupling and reducer, so as to avoid the adverse effects of high temperature on the coupling and bearing box during continuous operation. Greatly improve the transmission efficiency and reduce the failure rate.
  • the fan at the rear of the cooling water tank can cool down the coolant, improve the efficiency of coolant circulation, and effectively save resources.
  • Figure 1 is a schematic structural view of a permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to the present invention
  • Figure 2 is a three-dimensional half-sectional view of the motor housing of the present invention.
  • Figure 3 is a three-dimensional half-sectional view of the embedded cavity of the present invention.
  • Fig. 4 is a three-dimensional package cross-sectional view of the embedded cavity of the present invention from another angle;
  • Figure 5 is a schematic diagram of the three-dimensional structure of the cooling water tank of the present invention.
  • Fig. 6 is a schematic diagram of the three-dimensional structure of the cooling water tank of the present invention from another angle.
  • a permanent magnet direct-drive slurry pump with a water-cooled circulation structure includes a pump body, a permanent magnet synchronous motor, a water inlet pipe 17, a water outlet pipe 18, a base 28 and a cooling water tank 29.
  • the pump body and the permanent magnet synchronous motor are connected through the shaft 8 and fixedly installed on the base 28.
  • the permanent magnet synchronous motor and the slurry pump are an integrated structure, and the two share the same shaft, eliminating the need for coupling and reducer, thus avoiding the adverse effects of high temperature on the coupling and bearing box during continuous operation, and greatly improving the transmission Efficiency reduces the failure rate.
  • the pump body includes a pump casing 1, a front guard plate 2, an impeller 3, a rear guard plate 4 and a volute 5.
  • a volute 5 is provided inside the pump housing 1, and an impeller 3 is provided inside the volute 5.
  • the front and rear sides of the impeller 3 are respectively provided with a front guard plate 2 and a rear guard plate 4.
  • the permanent magnet synchronous motor includes a front cover 6, a motor housing 7, a shaft 8, a built-in coolant driving device, and a rear cover 13.
  • the motor housing 7 and the pump housing 1 are firmly connected by bolts.
  • the left end of the motor housing 7 is provided with a front end cover 6, and the front end cover 6 is connected and fixed with the motor housing 7 by screws.
  • a front end cover sealing ring 19 is provided between the front end cover 6 and the pump housing for sealing.
  • the left end of the shaft 8 is installed in the front end cover 6 through a bearing I22, and a felt sealing ring I20 and a shaft end sealing ring I21 are arranged between the shaft 8 and the front end cover 6.
  • the right end of the shaft 8 is installed in the motor housing 7 through a bearing II23.
  • a felt sealing ring I20 and a shaft end sealing ring I21 are arranged between the shaft 8 and the motor housing 7.
  • the leftmost end of the shaft 8 is connected with the impeller 3 through a spline to transmit torque.
  • the shaft 8 is provided with a rotor core 9 and a permanent magnet 10.
  • a stator core 11 is provided on the periphery of the permanent magnet 10.
  • the permanent magnet 10 is provided with a stator core 11 and windings 12 on the periphery, and is fixedly installed inside the motor housing 7.
  • the motor housing 7 is provided with a water inlet 7-1, a spiral water channel 7-2 and a water outlet 7-3.
  • a built-in cooling liquid driving device is embedded and installed in the motor housing 7, including a cavity cover 14, an embedded cavity 15 and a small impeller 16. By embedding the coolant driving device into the motor housing 7, the use of additional driving devices is avoided.
  • the embedded cavity 15 and the cavity cover 14 are connected and fixed by screws, and the cavity cover 14 is connected and fixed with the motor housing 7 by screws.
  • the embedded cavity 15 is provided with a small impeller 16 which is connected to the rightmost end of the shaft 8 through a flat key to transmit torque.
  • the small impeller in the built-in coolant drive device can offset the axial force in the slurry working process to a certain extent and reduce the adverse effects caused by the axial force.
  • the upper end of the embedded cavity 15 is provided with a small hole 15-1, and the small hole 15-1 communicates with the water inlet hole 7-1 and is equal in diameter.
  • the small hole 15-1 and the water inlet hole 7-1 communicate with the spiral water channel 7-2 and the inside of the embedded cavity 15.
  • the right end of the cavity cover 14 is provided with a back end cover 13, and the back end cover 13 and the motor housing 7 are fixedly connected by screws.
  • a two-stage sealing ring is arranged between the cavity cover 14 and the back end cover 13, including a back end cover sealing ring I and a back end cover sealing ring II.
  • the water inlet pipe 17 is connected from the left end of the cooling water tank 29, passes through the rear end cover 13 and the cavity cover 14, and communicates with the inside of the embedded cavity 15.
  • the inlet pipe 17 is provided with a temperature sensor at the mouth of the pipe.
  • the water inlet pipe 18 is connected out of the water outlet hole 7-3 on the motor housing 7, and is connected to the cooling water tank 29 from the upper end.
  • the cooling water tank 29 is provided with a partition plate I 29-2 and a partition plate II 29-3 inside.
  • the partition plate I 29-2 and the partition plate II 29-3 separate the outflow end and the inflow end of the cooling water in the cooling water tank 29.
  • Two sets of fans 29-1 are provided at the rear end of the cooling water tank 29, and the fans 29-1 can cool down the cooling water at the end of the water outlet pipe.
  • the fan at the rear of the cooling water tank can cool down the coolant, improve the efficiency of coolant circulation, and effectively save resources.
  • the cooling water with lower temperature is sucked out from the left end of the cooling water tank 29, flows into the embedded cavity 15 through the water inlet pipe 17, and then enters the motor through the small holes 15-1 and the water inlet 7-1
  • the spiral water channel 7-2 in the housing 7 flows into the water outlet pipe 18 from the water outlet hole 7-3, and finally flows into the right end of the cooling water tank 29, completing the entire cooling water circulation.
  • the temperature sensor detects that the water temperature is too high, the two sets of fans 29-1 at the rear of the cooling water tank 29 will intelligently start or stop according to the temperature level to achieve the best cooling effect.

Landscapes

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

Abstract

A permanent magnet direct drive slurry pump having a water cooling circulation structure, comprising a pump body and a permanent magnet synchronous motor, and further comprising a cooling water tank (29). The pump body and the permanent magnet synchronous motor are directly mounted and connected, and share one axis (8); the permanent magnet synchronous motor further comprises a built-in cooling liquid drive device; the built-in cooling liquid drive device is mounted in a motor housing (7) of the permanent magnet synchronous motor; the cooling water tank (29), the built-in cooling liquid drive device, and a cooling liquid channel formed in the motor housing (7) form a cooling circulation channel. The structure can improve the transmission efficiency, reduce a failure rate, and improve the recycling efficiency of cooling liquid, and can also offset the axial force generated during the working process of the slurry pump.

Description

一种具有水冷循环结构的永磁直驱渣浆泵Permanent magnet direct-drive slurry pump with water-cooled circulation structure 技术领域Technical field
本发明涉及渣浆泵技术领域，特别涉及一种具有水冷循环结构的永磁直驱渣浆泵。The invention relates to the technical field of slurry pumps, in particular to a permanent magnet direct-drive slurry pump with a water-cooled circulation structure.
背景技术Background technique
渣浆泵作为一种运输固液混合物的特殊离心泵，在煤矿、石化、电力、冶金以及建材等行业领域应用广泛。目前，常用的渣浆泵是通过电机、联轴器或者皮带轮等中间传动装置进行驱动，具有结构复杂、体积庞大、效率低、能耗高等缺点。采用永磁同步电机直接驱动负载，避免了传统驱动方式的缺点，大幅提高了机械传动效率。目前，永磁直驱***主要于风力发电、矿山物料运输等技术领域，在渣浆泵技术领域鲜有应用。在渣浆泵的运转过程中，驱动电机受时间、功率、负载等因素的影响，会在工作过程中产生热量。大量热量会导致电机内部永磁体产生磁衰退，进而影响电机驱动性能。因此，需要设计一种冷却结构对电机进行降温。As a special centrifugal pump for transporting solid-liquid mixtures, slurry pumps are widely used in coal mines, petrochemicals, electric power, metallurgy, and building materials industries. At present, the commonly used slurry pumps are driven by intermediate transmission devices such as motors, couplings or pulleys, which have the disadvantages of complex structure, large volume, low efficiency, and high energy consumption. The permanent magnet synchronous motor is used to directly drive the load, which avoids the shortcomings of traditional driving methods and greatly improves the efficiency of mechanical transmission. At present, the permanent magnet direct drive system is mainly used in technical fields such as wind power generation and mining material transportation, and it is rarely applied in the field of slurry pump technology. During the operation of the slurry pump, the driving motor is affected by factors such as time, power, load, etc., which will generate heat during the operation. A large amount of heat will cause magnetic degradation of the permanent magnets inside the motor, which will affect the drive performance of the motor. Therefore, it is necessary to design a cooling structure to cool the motor.
公开号为CN206917864U的中国专利公开了一种渣浆泵及其电机冷却装置，采用鼓风机连接冷却罩的方式对电机进行风冷，该方式增大了渣浆泵所需的工作空间和工作能耗。公开号为CN209228641U的中国专利公开了一种便于散热的渣浆泵，采用多级传动结构，利用风扇对冷却水降温，实现渣浆泵整体结构散热；该渣浆泵零件众多、结构复杂，且该方式只能实现电机和轴承箱的局部散热，冷却效果不佳。The Chinese patent with publication number CN206917864U discloses a slurry pump and its motor cooling device. The motor is air-cooled by a blower connected to a cooling cover. This method increases the working space and energy consumption of the slurry pump. . The Chinese patent with publication number CN209228641U discloses a slurry pump that is easy to dissipate heat. It adopts a multi-stage transmission structure and uses a fan to cool the cooling water to realize the heat dissipation of the overall structure of the slurry pump. The slurry pump has many parts, complex structure, and This method can only achieve partial heat dissipation of the motor and the bearing box, and the cooling effect is not good.
除此之外，渣浆泵在工作过程中叶轮两侧压力不等，会产生一定的轴向力。 由于不平衡力的存在，渣浆泵的转轴会发生窜动，进而会对轴的支承部件与泵的密封部件产生不利影响，降低工作效率，严重时甚至影响渣浆泵的正常工作。In addition, the pressure on both sides of the impeller of the slurry pump is not equal during the working process, which will generate a certain axial force. Due to the existence of the unbalanced force, the shaft of the slurry pump will move, which will adversely affect the shaft supporting parts and the sealing parts of the pump, reduce work efficiency, and even affect the normal operation of the slurry pump in severe cases.
发明内容Summary of the invention
为克服现有技术中存在的问题，本发明提供了一种具有水冷循环结构的永磁直驱渣浆泵。解决了现有渣浆泵结构复杂、传动效率低、能耗大等缺点，实现了驱动电机水冷循环的目的，且该结构具有辅助抵消轴向力的作用。In order to overcome the problems in the prior art, the present invention provides a permanent magnet direct drive slurry pump with a water-cooled circulation structure. The disadvantages of the existing slurry pump, such as complex structure, low transmission efficiency, and high energy consumption, are solved, and the purpose of the water cooling cycle of the driving motor is realized, and the structure has the function of assisting in offsetting the axial force.
本发明解决其技术问题所采取的技术方案是：该种具有水冷循环结构的永磁直驱渣浆泵，包括泵体、永磁同步电机，还包括冷却水箱，所述泵体与永磁同步电机直接安装连接，共用一根轴；永磁同步电机还包括内置冷却液驱动装置，所述内置冷却液驱动装置安装在永磁同步电机的电机壳体内，冷却水箱与内置冷却液驱动装置、电机壳体设有的冷却液通道形成冷却循环通道。The technical solution adopted by the present invention to solve its technical problems is: the permanent magnet direct-drive slurry pump with a water-cooled circulation structure includes a pump body, a permanent magnet synchronous motor, and a cooling water tank. The pump body is synchronized with the permanent magnet. The motor is directly installed and connected, sharing a single shaft; the permanent magnet synchronous motor also includes a built-in coolant drive device, the built-in coolant drive device is installed in the motor housing of the permanent magnet synchronous motor, the cooling water tank and the built-in coolant drive device, The cooling liquid channel provided in the motor housing forms a cooling circulation channel.
进一步地，所述电机壳体设有进水孔、螺旋水道和出水孔，螺旋水道在电机壳体内周向螺旋布置，进水孔与螺旋水道和出水孔形成冷却液通道。Further, the motor housing is provided with a water inlet, a spiral water channel and a water outlet. The spiral water channel is spirally arranged in the motor housing, and the water inlet, the spiral water channel and the water outlet form a coolant channel.
进一步地，内置冷却液驱动装置包括：腔体封盖和嵌入式腔体；所述嵌入式腔体内部连通；进水管由冷却水箱接出，并穿过后端盖和腔体封盖后与嵌入式腔体连通，所述出水管由出水孔接出，并通入冷却水箱内。Further, the built-in cooling liquid driving device includes: a cavity cover and an embedded cavity; the embedded cavity is connected internally; The cavities are connected, and the water outlet pipe is connected out of the water outlet hole and leads into the cooling water tank.
进一步地，所述所述嵌入式腔体上端设有小孔，所述小孔与进水孔等径同轴，共同连通嵌入式腔体内部和螺旋水道。Further, the upper end of the embedded cavity is provided with a small hole, the small hole and the water inlet hole are equal in diameter and communicate with the inside of the embedded cavity and the spiral water channel.
进一步地，内置冷却液驱动装置还包括小叶轮，嵌入式腔体内部设有小叶轮，所述小叶轮通过平键与轴的端部连接。Further, the built-in coolant driving device further includes a small impeller, and a small impeller is arranged in the embedded cavity, and the small impeller is connected to the end of the shaft through a flat key.
进一步地，所述冷却水箱内部设有分隔板Ⅰ和分隔板Ⅱ，分隔板Ⅰ与分隔板Ⅱ上下交错布置，所述冷却水箱后端设有两组风扇。Further, a partition plate I and a partition plate II are arranged inside the cooling water tank, and the partition plate I and the partition plate II are arranged staggered up and down, and two sets of fans are arranged at the rear end of the cooling water tank.
进一步地，所述冷却水箱内设有用于监测和反馈进水管口的水温、智能控制两组风扇的启动与停止的温度传感器。Further, the cooling water tank is provided with a temperature sensor for monitoring and feeding back the water temperature of the water inlet pipe, and intelligently controlling the start and stop of the two sets of fans.
综上，本发明的上述技术方案的有益效果如下：In summary, the beneficial effects of the above technical solutions of the present invention are as follows:
(1)永磁同步电机与渣浆泵为一体式结构，两者共用一根轴，省去了联轴器和减速器，从而避免连续工作时高温对联轴器、轴承箱造成的不良影响，大幅提高传动效率，降低了故障率。(1) The permanent magnet synchronous motor and the slurry pump are an integrated structure, and the two share the same shaft, eliminating the need for coupling and reducer, so as to avoid the adverse effects of high temperature on the coupling and bearing box during continuous operation. Greatly improve the transmission efficiency and reduce the failure rate.
(2)通过将冷却液驱动装置嵌入到电机壳体内部，避免了使用额外驱动装置；内置冷却液驱动装置中的小叶轮能够在一定程度上抵消渣浆工作过程中的轴向力，降低因轴向力造成的不利影响。(2) By embedding the coolant driving device into the motor housing, the use of additional driving devices is avoided; the small impeller in the built-in coolant driving device can offset the axial force in the slurry working process to a certain extent and reduce The adverse effect caused by the axial force.
(3)冷却水箱后端风扇可以对冷却液进行降温，提高冷却液循环使用效率，有效节约资源。(3) The fan at the rear of the cooling water tank can cool down the coolant, improve the efficiency of coolant circulation, and effectively save resources.
附图说明Description of the drawings
图1是本发明一种具有水冷循环结构的永磁直驱渣浆泵的结构示意图；Figure 1 is a schematic structural view of a permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to the present invention;
图2是本发明电机壳体的三维半剖图；Figure 2 is a three-dimensional half-sectional view of the motor housing of the present invention;
图3是本发明嵌入式腔体的三维半剖图；Figure 3 is a three-dimensional half-sectional view of the embedded cavity of the present invention;
图4为本发明嵌入式腔体另一角度的三维包剖图；Fig. 4 is a three-dimensional package cross-sectional view of the embedded cavity of the present invention from another angle;
图5是本发明冷却水箱的三维结构示意图；Figure 5 is a schematic diagram of the three-dimensional structure of the cooling water tank of the present invention;
图6为本发明冷却水箱另一角度的三维结构示意图。Fig. 6 is a schematic diagram of the three-dimensional structure of the cooling water tank of the present invention from another angle.
图中：In the picture:
1—泵壳、2—前护板、3—叶轮、4—后护板、5—蜗壳、6—前端盖、7—电机壳体、7-1—进水孔、7-2—螺旋水道、7-3—出水孔、8—轴、9—转子铁芯、10—永磁体、11—定子铁芯、12—绕组、13—后端盖、14—腔体封盖、15—嵌 入式腔体、15-1—小孔、16—小叶轮、17—进水管、18—出水管、19—前端盖密封圈、20—毛毡密封圈Ⅰ、21—轴端密封圈Ⅰ、22—轴承Ⅰ、23—轴承Ⅱ、24—轴端密封圈Ⅱ、25—毛毡密封圈Ⅱ、26—后端盖密封圈Ⅰ、27—后端盖密封圈Ⅱ、28—底座、29—冷却水箱、29-1—风扇、29-2—分隔板Ⅰ、29-3—分隔板Ⅱ。1—Pump casing, 2—Front guard plate, 3—Impeller, 4—Rear guard plate, 5—Volute casing, 6—Front end cover, 7—Motor housing, 7-1—Water inlet, 7-2— Spiral water channel, 7-3—water outlet, 8-axis, 9—rotor core, 10-permanent magnet, 11—stator core, 12—winding, 13—back end cover, 14—cavity cover, 15— Embedded cavity, 15-1—small hole, 16—small impeller, 17—water inlet pipe, 18—water outlet pipe, 19—front end cover seal ring, 20—felt seal ring I, 21—shaft end seal ring I, 22 —Bearing I, 23—Bearing II, 24—Shaft end seal II, 25—Felt seal II, 26—Back end cover seal I, 27—Back end cover seal II, 28—Base, 29—Cooling water tank , 29-1—fan, 29-2—partition plate I, 29-3—partition plate II.
具体实施方式Detailed ways
以下结合附图对本发明的特征和原理进行详细说明，所举实施例仅用于解释本发明，并非以此限定本发明的保护范围。The features and principles of the present invention will be described in detail below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and are not intended to limit the protection scope of the present invention.
如图1至图6所示，一种具有水冷循环结构的永磁直驱渣浆泵，包括泵体、永磁同步电机、进水管17、出水管18、底座28和冷却水箱29。As shown in Figs. 1 to 6, a permanent magnet direct-drive slurry pump with a water-cooled circulation structure includes a pump body, a permanent magnet synchronous motor, a water inlet pipe 17, a water outlet pipe 18, a base 28 and a cooling water tank 29.
如图1所示，其中，泵体和永磁同步电机通过轴8连接，并固定安装在底座28上。永磁同步电机与渣浆泵为一体式结构，两者共用一根轴，省去了联轴器和减速器，从而避免连续工作时高温对联轴器、轴承箱造成的不良影响，大幅提高传动效率，降低了故障率。As shown in FIG. 1, the pump body and the permanent magnet synchronous motor are connected through the shaft 8 and fixedly installed on the base 28. The permanent magnet synchronous motor and the slurry pump are an integrated structure, and the two share the same shaft, eliminating the need for coupling and reducer, thus avoiding the adverse effects of high temperature on the coupling and bearing box during continuous operation, and greatly improving the transmission Efficiency reduces the failure rate.
泵体包括泵壳1、前护板2、叶轮3、后护板4和蜗壳5。泵壳1内部设有蜗壳5，所述蜗壳5内部设有叶轮3。叶轮3前后两侧分别设有前护板2和后护板4。The pump body includes a pump casing 1, a front guard plate 2, an impeller 3, a rear guard plate 4 and a volute 5. A volute 5 is provided inside the pump housing 1, and an impeller 3 is provided inside the volute 5. The front and rear sides of the impeller 3 are respectively provided with a front guard plate 2 and a rear guard plate 4.
永磁同步电机包括前端盖6、电机壳体7、轴8、内置冷却液驱动装置和后端盖13。电机壳体7与泵壳1通过螺栓紧固连接。电机壳体7左端设有前端盖6，前端盖6通过螺钉与电机壳体7连接固定。前端盖6与泵壳之间设有前端盖密封圈19进行密封。轴8的左端通过轴承Ⅰ22安装在前端盖6内，轴8与前端盖6之间设有毛毡密封圈Ⅰ20和轴端密封圈Ⅰ21。轴8的右端通过轴承Ⅱ23安 装在电机壳体7内，轴8与电机壳体7之间设有毛毡密封圈Ⅰ20和轴端密封圈Ⅰ21。轴8的最左端通过花键与叶轮3连接，以传递扭矩。轴8上设置有转子铁芯9和永磁体10。永磁体10的***设有定子铁芯11。永磁体10***设置有定子铁芯11及绕组12，并固定安装在电机壳体7内部。The permanent magnet synchronous motor includes a front cover 6, a motor housing 7, a shaft 8, a built-in coolant driving device, and a rear cover 13. The motor housing 7 and the pump housing 1 are firmly connected by bolts. The left end of the motor housing 7 is provided with a front end cover 6, and the front end cover 6 is connected and fixed with the motor housing 7 by screws. A front end cover sealing ring 19 is provided between the front end cover 6 and the pump housing for sealing. The left end of the shaft 8 is installed in the front end cover 6 through a bearing I22, and a felt sealing ring I20 and a shaft end sealing ring I21 are arranged between the shaft 8 and the front end cover 6. The right end of the shaft 8 is installed in the motor housing 7 through a bearing II23. A felt sealing ring I20 and a shaft end sealing ring I21 are arranged between the shaft 8 and the motor housing 7. The leftmost end of the shaft 8 is connected with the impeller 3 through a spline to transmit torque. The shaft 8 is provided with a rotor core 9 and a permanent magnet 10. A stator core 11 is provided on the periphery of the permanent magnet 10. The permanent magnet 10 is provided with a stator core 11 and windings 12 on the periphery, and is fixedly installed inside the motor housing 7.
如图2所示，电机壳体7内设有进水孔7-1、螺旋水道7-2以及出水孔7-3。电机壳体7内嵌入安装有内置冷却液驱动装置，包括腔体封盖14、嵌入式腔体15和小叶轮16。通过将冷却液驱动装置嵌入到电机壳体7是内部，避免了使用额外驱动装置。As shown in Figure 2, the motor housing 7 is provided with a water inlet 7-1, a spiral water channel 7-2 and a water outlet 7-3. A built-in cooling liquid driving device is embedded and installed in the motor housing 7, including a cavity cover 14, an embedded cavity 15 and a small impeller 16. By embedding the coolant driving device into the motor housing 7, the use of additional driving devices is avoided.
嵌入式腔体15与腔体封盖14通过螺钉连接固定，腔体封盖14通过螺钉与电机壳体7连接固定。嵌入式腔体15内部设有小叶轮16，所述小叶轮16通过平键与轴8的最右端连接，以传递扭矩。内置冷却液驱动装置中的小叶轮能够在一定程度上抵消渣浆工作过程中的轴向力，降低因轴向力造成的不利影响。The embedded cavity 15 and the cavity cover 14 are connected and fixed by screws, and the cavity cover 14 is connected and fixed with the motor housing 7 by screws. The embedded cavity 15 is provided with a small impeller 16 which is connected to the rightmost end of the shaft 8 through a flat key to transmit torque. The small impeller in the built-in coolant drive device can offset the axial force in the slurry working process to a certain extent and reduce the adverse effects caused by the axial force.
如图3、图4所示，嵌入式腔体15上端设置有小孔15-1，小孔15-1与进水孔7-1连通并且等径同轴。小孔15-1与进水孔7-1连通螺旋水道7-2和嵌入式腔体15内部。腔体封盖14右端设有后端盖13，后端盖13与电机壳体7通过螺钉固定连接。腔体封盖14与后端盖13之间设有两级密封圈，包括后端盖密封圈Ⅰ和后端盖密封圈Ⅱ。As shown in FIGS. 3 and 4, the upper end of the embedded cavity 15 is provided with a small hole 15-1, and the small hole 15-1 communicates with the water inlet hole 7-1 and is equal in diameter. The small hole 15-1 and the water inlet hole 7-1 communicate with the spiral water channel 7-2 and the inside of the embedded cavity 15. The right end of the cavity cover 14 is provided with a back end cover 13, and the back end cover 13 and the motor housing 7 are fixedly connected by screws. A two-stage sealing ring is arranged between the cavity cover 14 and the back end cover 13, including a back end cover sealing ring I and a back end cover sealing ring II.
进水管17由冷却水箱29左端接出，并穿过后端盖13和腔体封盖14，与嵌入式腔体15内部连通。进水管17在管口处设有温度传感器。进水管18由电机壳体7上出水孔7-3接出，并由上端接入冷却水箱29内。The water inlet pipe 17 is connected from the left end of the cooling water tank 29, passes through the rear end cover 13 and the cavity cover 14, and communicates with the inside of the embedded cavity 15. The inlet pipe 17 is provided with a temperature sensor at the mouth of the pipe. The water inlet pipe 18 is connected out of the water outlet hole 7-3 on the motor housing 7, and is connected to the cooling water tank 29 from the upper end.
如图5、图6所示，冷却水箱29内部设有分隔板Ⅰ29-2和分隔板Ⅱ29-3。分隔板Ⅰ29-2和分隔板Ⅱ29-3将冷却水箱29中冷却水流出端和流入端分隔开。 冷却水箱29后端设有设置有两组风扇29-1，所述风扇29-1能够实现对出水管端的冷却水进行降温。冷却水箱后端风扇可以对冷却液进行降温，提高冷却液循环使用效率，有效节约资源。As shown in Figures 5 and 6, the cooling water tank 29 is provided with a partition plate I 29-2 and a partition plate II 29-3 inside. The partition plate I 29-2 and the partition plate II 29-3 separate the outflow end and the inflow end of the cooling water in the cooling water tank 29. Two sets of fans 29-1 are provided at the rear end of the cooling water tank 29, and the fans 29-1 can cool down the cooling water at the end of the water outlet pipe. The fan at the rear of the cooling water tank can cool down the coolant, improve the efficiency of coolant circulation, and effectively save resources.
在渣浆泵工作过程中，温度较低的冷却水从冷却水箱29左端吸出，经进水管17流入嵌入式腔体15内部，再经过小孔15-1和进水孔7-1进入电机壳体7内的螺旋水道7-2，从出水孔7-3流入出水管18，最终流入冷却水箱29右端，完成整个冷却水的循环。当温度传感器检测到水温度过高时，冷却水箱29后端的两组风扇29-1会根据温度等级智能开启或停止，实现最佳冷却效果。During the operation of the slurry pump, the cooling water with lower temperature is sucked out from the left end of the cooling water tank 29, flows into the embedded cavity 15 through the water inlet pipe 17, and then enters the motor through the small holes 15-1 and the water inlet 7-1 The spiral water channel 7-2 in the housing 7 flows into the water outlet pipe 18 from the water outlet hole 7-3, and finally flows into the right end of the cooling water tank 29, completing the entire cooling water circulation. When the temperature sensor detects that the water temperature is too high, the two sets of fans 29-1 at the rear of the cooling water tank 29 will intelligently start or stop according to the temperature level to achieve the best cooling effect.
上述实施例仅仅是对本发明的优选实施方式进行的描述，并非对本发明的范围进行限定，在不脱离本发明设计精神的前提下，本领域相关技术人员对本发明的各种变形和改进，均应扩入本发明权利要求书所确定的保护范围内。The above-mentioned embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, those skilled in the art shall apply various modifications and improvements to the present invention. Expanded into the scope of protection determined by the claims of the present invention.

Claims (7)

  1. 一种具有水冷循环结构的永磁直驱渣浆泵，包括泵体、永磁同步电机，其特征在于，还包括冷却水箱(29)，所述泵体与永磁同步电机直接安装连接，共用一根轴(8)；永磁同步电机还包括内置冷却液驱动装置，所述内置冷却液驱动装置安装在永磁同步电机的电机壳体(7)内，冷却水箱(29)与内置冷却液驱动装置、电机壳体(7)设有的冷却液通道形成冷却循环通道。A permanent magnet direct-drive slurry pump with a water-cooled circulation structure includes a pump body and a permanent magnet synchronous motor, and is characterized in that it also includes a cooling water tank (29). The pump body is directly connected to the permanent magnet synchronous motor and shared One shaft (8); the permanent magnet synchronous motor also includes a built-in coolant drive device installed in the motor housing (7) of the permanent magnet synchronous motor, a cooling water tank (29) and built-in cooling The cooling liquid channel provided in the liquid driving device and the motor housing (7) forms a cooling circulation channel.
  2. 根据权利要求1所述的一种具有水冷循环结构的永磁直驱渣浆泵，其特征在于，所述电机壳体(7)设有进水孔(7-1)、螺旋水道(7-2)和出水孔(7-3)，螺旋水道(7-2)在电机壳体(7)内周向螺旋布置，进水孔(7-1)与螺旋水道(7-2)和出水孔(7-3)形成冷却液通道。A permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to claim 1, wherein the motor housing (7) is provided with a water inlet (7-1) and a spiral water channel (7). -2) and the water outlet (7-3), the spiral water channel (7-2) is spirally arranged in the motor housing (7), and the water inlet (7-1) and the spiral water channel (7-2) and The water outlet hole (7-3) forms a cooling liquid channel.
  3. 根据权利要求2所述的一种具有水冷循环结构的永磁直驱渣浆泵，其特征在于，内置冷却液驱动装置包括：腔体封盖(14)和嵌入式腔体(15)；所述嵌入式腔体(15)内部连通；进水管(17)由冷却水箱(29)接出，并穿过后端盖(13)和腔体封盖(14)后与嵌入式腔体(15)连通，所述出水管(18)由出水孔(7-3)接出，并通入冷却水箱(29)内。The permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to claim 2, characterized in that the built-in coolant driving device comprises: a cavity cover (14) and an embedded cavity (15); The embedded cavity (15) is internally connected; the water inlet pipe (17) is connected by the cooling water tank (29), passes through the back end cover (13) and the cavity cover (14), and then connects with the embedded cavity (15) Connected, the water outlet pipe (18) is connected out of the water outlet hole (7-3) and leads into the cooling water tank (29).
  4. 根据权利要求3所述的一种具有水冷循环结构的永磁直驱渣浆泵，其特征在于，所述所述嵌入式腔体(15)上端设有小孔(15-1)，所述小孔(15-1)与进水孔(7-1)等径同轴，共同连通嵌入式腔体(15)内部和螺旋水道(7-2)。A permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to claim 3, characterized in that the upper end of the embedded cavity (15) is provided with a small hole (15-1), and the The small hole (15-1) and the water inlet hole (7-1) are of equal diameter and are coaxially connected to the inside of the embedded cavity (15) and the spiral water channel (7-2).
  5. 根据权利要求3所述的一种具有水冷循环结构的永磁直驱渣浆泵，其特征在于，内置冷却液驱动装置还包括小叶轮(16)，嵌入式腔体(15)内部设有小叶轮(16)，所述小叶轮(16)通过平键与轴(8)的端部连接。A permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to claim 3, characterized in that the built-in coolant driving device further includes a small impeller (16), and the embedded cavity (15) is provided with a small An impeller (16), the small impeller (16) is connected to the end of the shaft (8) through a flat key.
  6. 根据权利要求1所述的一种具有水冷循环结构的永磁直驱渣浆泵，其特征在于，所述冷却水箱(29)内部设有分隔板Ⅰ(29-2)和分隔板Ⅱ(29-3)， 分隔板Ⅰ(29-2)与分隔板Ⅱ(29-3)上下交错布置，所述冷却水箱(29)后端设有两组风扇(29-1)。The permanent magnet direct-drive slurry pump with a water-cooled circulation structure according to claim 1, wherein the cooling water tank (29) is provided with a partition plate I (29-2) and a partition plate II. (29-3), the partition plate I (29-2) and the partition plate II (29-3) are arranged staggered up and down, and the rear end of the cooling water tank (29) is provided with two sets of fans (29-1).
  7. 根据权利要求1或6所述的一种具有水冷循环结构的永磁直驱渣浆泵，其特征在于，所述冷却水箱(29)内设有用于监测和反馈进水管口的水温、智能控制两组风扇的启动与停止的温度传感器。A permanent magnet direct-drive slurry pump with a water-cooling circulation structure according to claim 1 or 6, characterized in that, the cooling water tank (29) is provided with water temperature and intelligent control for monitoring and feedback of the water inlet pipe. Two temperature sensors for the start and stop of the fans.
PCT/CN2020/106924 2020-05-11 2020-08-05 Permanent magnet direct drive slurry pump having water cooling circulation structure WO2021227262A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010392407.9 2020-05-11
CN202010392407.9A CN111561453B (en) 2020-05-11 2020-05-11 Permanent magnet direct-drive slurry pump with water-cooling circulation structure

Publications (1)

Publication Number Publication Date
WO2021227262A1 true WO2021227262A1 (en) 2021-11-18

Family

ID=72070887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/106924 WO2021227262A1 (en) 2020-05-11 2020-08-05 Permanent magnet direct drive slurry pump having water cooling circulation structure

Country Status (2)

Country Link
CN (1) CN111561453B (en)
WO (1) WO2021227262A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115822999A (en) * 2022-12-17 2023-03-21 大庆特博科技发展有限公司 Sealed cooling structure of high-speed turbine aeration fan
CN117013744A (en) * 2023-08-17 2023-11-07 常州宝马前杨电机电器有限公司 Strong heat dissipation reluctance type stepping motor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114567115B (en) * 2022-03-16 2024-04-19 河南科技大学 Hydraulic motor pump with forced flow heat dissipation function
CN114909299A (en) * 2022-05-07 2022-08-16 安徽南方化工泵业有限公司 Stainless steel high-temperature magnetic pump

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251991A (en) * 2011-08-19 2011-11-23 江苏大学 Axial force balance device and method for shield pump
CN204046357U (en) * 2014-07-19 2014-12-24 李东文 A kind of electric automobile water-cooled machine
DE102014106456A1 (en) * 2014-05-08 2015-11-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Electric machine for use in the automotive sector with a cylindrical housing arrangement
CN105351212A (en) * 2015-10-30 2016-02-24 耐驰泵阀科技（天津）有限公司 Water pump with cooling function
CN105909532A (en) * 2016-07-12 2016-08-31 合肥新沪屏蔽泵有限公司 Water-cooled shield pump
CN206917863U (en) * 2017-07-26 2018-01-23 刘国云 A kind of horizontal pipeline centrifugal pump
FR3060896A1 (en) * 2016-12-20 2018-06-22 Valeo Systemes De Controle Moteur ELECTRIC COMPRESSOR WITH COOLING CIRCUIT
CN108518347A (en) * 2018-06-11 2018-09-11 杭州大路实业有限公司 A kind of integral shaft synchronizes canned motor pump to suspension permanent magnet
US20190291570A1 (en) * 2018-03-23 2019-09-26 Sf Motors, Inc. Dual loop liquid cooling of integrated electric drivetrain

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2713186Y (en) * 2004-06-26 2005-07-27 中国矿业大学 Dreg slurry pump
CN204419677U (en) * 2015-01-21 2015-06-24 徐州长龙能源科技有限公司 A kind of Pulp pump sealing box structure
CN204961410U (en) * 2015-09-17 2016-01-13 四川达竹煤电（集团）有限责任公司石板选煤发电厂 Sediment stuff pump with cooling water is from circulating device
CN109026719A (en) * 2018-07-24 2018-12-18 高邮市高农机械配件有限公司 A kind of electronic water pump for automobile
CN109812422B (en) * 2019-01-11 2020-09-04 江苏泰丰泵业有限公司 Horizontal cold water pump
CN110725802A (en) * 2019-11-20 2020-01-24 上海佰诺泵阀有限公司 Integrated magnetic pump in impeller

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251991A (en) * 2011-08-19 2011-11-23 江苏大学 Axial force balance device and method for shield pump
DE102014106456A1 (en) * 2014-05-08 2015-11-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Electric machine for use in the automotive sector with a cylindrical housing arrangement
CN204046357U (en) * 2014-07-19 2014-12-24 李东文 A kind of electric automobile water-cooled machine
CN105351212A (en) * 2015-10-30 2016-02-24 耐驰泵阀科技（天津）有限公司 Water pump with cooling function
CN105909532A (en) * 2016-07-12 2016-08-31 合肥新沪屏蔽泵有限公司 Water-cooled shield pump
FR3060896A1 (en) * 2016-12-20 2018-06-22 Valeo Systemes De Controle Moteur ELECTRIC COMPRESSOR WITH COOLING CIRCUIT
CN206917863U (en) * 2017-07-26 2018-01-23 刘国云 A kind of horizontal pipeline centrifugal pump
US20190291570A1 (en) * 2018-03-23 2019-09-26 Sf Motors, Inc. Dual loop liquid cooling of integrated electric drivetrain
CN108518347A (en) * 2018-06-11 2018-09-11 杭州大路实业有限公司 A kind of integral shaft synchronizes canned motor pump to suspension permanent magnet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115822999A (en) * 2022-12-17 2023-03-21 大庆特博科技发展有限公司 Sealed cooling structure of high-speed turbine aeration fan
CN117013744A (en) * 2023-08-17 2023-11-07 常州宝马前杨电机电器有限公司 Strong heat dissipation reluctance type stepping motor

Also Published As

Publication number Publication date
CN111561453B (en) 2022-05-27
CN111561453A (en) 2020-08-21

Similar Documents

Publication Publication Date Title
WO2021227262A1 (en) Permanent magnet direct drive slurry pump having water cooling circulation structure
WO2021052013A1 (en) High-efficiency, low-noise automobile electronic water pump
CN107905995A (en) A kind of water-cooled brushless electric machine pump unit and high-pressure cleaning device
CN111969736A (en) High-efficient water-cooling hydroelectric generator structure
WO2022166226A1 (en) Phase-change cooling type permanent magnet direct-drive blower
CN110718992B (en) Motor iron core
CN203879750U (en) Shield pump conveying high temperature liquid
CN103762780B (en) A kind of AC servo direct-driving type three screw rod electricity liquid pump
CN211183643U (en) Main shaft motor casing with water-cooling channel
CN101651375B (en) Brushless ironless direct-current energy-saving motor of permanent magnetic module type
CN109962593A (en) A kind of bimorph transducer formula rare-earth permanent magnet motor
CN113217402A (en) Water-cooling intelligent pump
CN113107863A (en) Water-cooling efficient multistage pump
CN101651377B (en) Brushless ironless energy-saving direct-current motor of permanent-magnetic outer rotor module type
WO2022252436A1 (en) Composite material permanent magnet synchronous electric motor
CN102324796B (en) Liquid-cooled radiating external rotor motor
CN113482939B (en) High-efficiency water-cooling outer rotor type permanent magnet intelligent water pump with integrated controller
CN201478947U (en) Low-noise water-cooled motor for water pumps
CN114552852B (en) Large-scale internal-external mixed double-air-cooling and water-cooling permanent magnet synchronous motor
CN220470246U (en) Impeller built-in bidirectional full-through-flow submersible electric pump
CN207638504U (en) A kind of pump motor
CN213937617U (en) Double-speed lifting brake motor convenient for heat dissipation
CN101651374A (en) Self-cooling direct-current energy-saving motor of permanent magnetic module type
CN221074714U (en) Motor shaft for water pump motor
CN211525110U (en) Booster pump

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20935073

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20935073

Country of ref document: EP

Kind code of ref document: A1