WO2020111186A1 - 水中ポンプ - Google Patents

水中ポンプ Download PDF

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Publication number
WO2020111186A1
WO2020111186A1 PCT/JP2019/046595 JP2019046595W WO2020111186A1 WO 2020111186 A1 WO2020111186 A1 WO 2020111186A1 JP 2019046595 W JP2019046595 W JP 2019046595W WO 2020111186 A1 WO2020111186 A1 WO 2020111186A1
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WO
WIPO (PCT)
Prior art keywords
chamber
motor
heat exchange
cooling liquid
flow path
Prior art date
Application number
PCT/JP2019/046595
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
智矢 金子
慎吾 吉田
秀典 鶴田
Original Assignee
株式会社鶴見製作所
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 株式会社鶴見製作所 filed Critical 株式会社鶴見製作所
Priority to KR1020207036765A priority Critical patent/KR102515508B1/ko
Priority to SG11202012607XA priority patent/SG11202012607XA/en
Priority to CN201980053523.3A priority patent/CN112567137A/zh
Publication of WO2020111186A1 publication Critical patent/WO2020111186A1/ja

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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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • 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
    • F04D29/08—Sealings
    • 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
    • F04D29/083—Sealings especially adapted for elastic fluid 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
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/11—Kind or type liquid, i.e. incompressible

Definitions

  • the present invention relates to a submersible pump.
  • Japanese Patent No. 5552402 discloses a submersible pump including a motor, a cooling liquid circulation passage for cooling liquid for cooling the motor, and a mechanical seal provided on the cooling liquid circulation passage.
  • the submersible pump is also configured to use the motor cooling liquid as a lubricating liquid for the mechanical seal.
  • the present invention has been made to solve the above problems, and one object of the present invention is to select optimum liquids for cooling a motor and lubricating a mechanical seal. And to provide a submersible pump capable of suppressing contamination of the cooling liquid.
  • a submersible pump includes a motor including a drive shaft, a pump chamber in which an impeller driven by the motor is arranged, a suction port and a discharge port, and a mechanical seal having a sliding portion.
  • An oil chamber that is provided between the motor and the pump chamber, a motor cooling chamber that is disposed adjacent to the motor and cools the motor with the cooling liquid, and a pump cooling chamber that is disposed adjacent to the pump chamber.
  • a heat exchange chamber that exchanges heat between the cooling liquid and the liquid in the pump chamber by flowing it, and is provided outside the oil chamber in the radial direction of the drive shaft to connect the heat exchange chamber and the motor cooling chamber.
  • a second flow path that allows the cooling liquid to flow in the opposite direction to the flow path is provided.
  • the optimum liquids can be selected as the liquids for cooling the motor and lubricating the mechanical seal. Further, even when the liquid in the pump chamber enters through the mechanical seal, the liquid (oil) in the oil chamber can be contaminated first, so that the contamination of the cooling liquid can be prevented. As described above, the optimum liquids can be selected as the liquids for cooling the motor and lubricating the mechanical seals, and the contamination of the cooling liquid can be suppressed.
  • the heat exchange chamber is provided with a watertight seal structure for the outside.
  • the seal structure can effectively prevent infiltration of liquid or air into the heat exchange chamber from the outside of the heat exchange chamber such as the pump chamber side, the atmosphere side, and the oil chamber side. As a result, it is possible to further suppress the contamination of the cooling liquid.
  • a cooling liquid circulation impeller of a cooling liquid driven by a motor is arranged, and the cooling liquid circulation pump is provided in the second flow path between the motor and the oil chamber.
  • a room is further provided.
  • the cooling liquid circulation pump chamber can be arranged along the drive shaft at a position farther than the oil chamber with respect to the pump chamber. It can be an oil chamber. As a result, it is possible to further suppress the contamination of the cooling liquid.
  • the first flow path and the second flow path extend in the axial direction of the drive shaft along the outer periphery of the oil chamber on the outer side in the radial direction of the drive shaft of the oil chamber. ing.
  • the first flow passage and the second flow passage are provided in comparison with the case where the first flow passage and the second flow passage extend in the direction intersecting the axial direction of the drive shaft around the oil chamber. Since the flow path length can be shortened, energy loss in the flow path can be reduced and the motor can be cooled efficiently.
  • At least one of the first flow path and the second flow path is preferably formed so as to surround substantially the entire circumference of the oil chamber.
  • the cooling liquid can flow into the heat exchange chamber from substantially the entire circumference of the oil chamber, so that a large heat transfer area between the cooling liquid in the heat exchange chamber and the liquid in the pump chamber can be secured. it can. As a result, heat exchange between the cooling liquid and the liquid in the pump chamber can be effectively performed.
  • the second flow passage is arranged on the inner side in the radial direction of the drive shaft of the first flow passage, and the cooling liquid circulation impeller separates the heat exchange chamber from the heat exchange chamber.
  • the cooling liquid is made to flow into the cooling liquid circulation pump chamber, and the cooling liquid made to flow out from the cooling liquid circulation pump chamber is made to flow to the motor cooling chamber.
  • the cooling liquid cooled in the heat exchange chamber can be made to flow in the second flow passage that is closer to the motor than the first flow passage in the radial direction of the drive shaft, so that it is effective.
  • the motor can be cooled.
  • the second flow passage is arranged on the inner side in the radial direction of the drive shaft of the first flow passage, and the cooling liquid circulation impeller is used to separate the cooling liquid circulation pump chamber from the motor cooling chamber.
  • the cooling liquid is made to flow into the cooling liquid circulation pump chamber, and the cooling liquid made to flow out from the cooling liquid circulation pump chamber is made to flow to the heat exchange chamber.
  • the cooling liquid circulation impeller allows the cooling liquid to flow toward the heat exchange chamber side opposite to the motor (excluding the drive shaft), so that the motor side has a negative pressure. Therefore, it is possible to effectively suppress the water from entering the motor.
  • the submersible pump according to the above aspect preferably further includes one first housing portion including an oil exchange hole that communicates the atmosphere with the oil chamber and having the oil chamber. According to this structure, it is possible to save the labor of assembling the plurality of casing parts, as compared with the case where the oil exchange hole is provided over the plurality of casing parts. Further, the number of seal members required to prevent oil leakage can be reduced.
  • the first housing portion is configured such that the oil exchange hole and the first flow path and the second flow path provided in the first housing portion do not overlap each other in a plan view. .. According to this structure, it is possible to prevent the flow of the cooling liquid in the first flow path and the second flow path from being obstructed by the oil exchange hole, and to prevent the structure of the first housing section from becoming complicated. be able to.
  • At least one first flow path is provided, and the first flow path is disposed outside the drive shaft in the radial direction of the second flow path, and is an arc surrounding the drive shaft in plan view. It is formed in a shape.
  • the shape of the first flow path can be a shape along the outer circumference of the motor.
  • the heat exchange chamber side is opened, and the first casing part in which the oil chamber is provided and the first casing part side are opened.
  • a partition member that is arranged between the first housing portion and the second housing portion and that partitions the oil chamber and the heat exchange chamber. 1 includes a seal member which is provided between the housing portion and the partition member and seals the oil chamber and the heat exchange chamber in a watertight manner. According to this structure, the seal member seals the space between the oil chamber and the heat exchange chamber in a watertight manner, and prevents the coolant from being contaminated by the oil.
  • the heat exchange chamber side is opened, and the first casing part in which the oil chamber is provided and the first casing part side are opened.
  • a partition member that is arranged between the first housing portion and the second housing portion and that partitions the oil chamber and the heat exchange chamber. It includes an integrated structure in which the two housing parts and the partition member are integrally formed. According to this structure, it is possible to improve the water tightness of the heat exchange chamber by reducing the number of places where sealing is required. As a result, the device configuration can be further simplified.
  • the first casing portion provided with the oil chamber, the second casing portion provided with the heat exchange chamber, and the cooling liquid circulation pump chamber be provided.
  • a fourth housing portion provided between the third housing portion and the motor, wherein the first flow passage and the second flow passage are provided with respect to the pump chamber.
  • the first casing part, the second casing part, the third casing part and the fourth casing part are arranged in the order of the second casing part, the first casing part, the third casing part and the fourth casing part. It is formed by stacking. According to this structure, the first housing portion, the second housing portion, the third housing portion, and the fourth housing portion, the second housing portion, the first housing portion, the third housing portion, and The pump main body can be easily assembled simply by stacking the fourth housing portion in this order.
  • the fourth housing portion includes a motor-side first opening that connects the first flow path to the motor cooling chamber, and a motor-side second opening that connects the second flow path to the motor cooling chamber.
  • the motor-side first opening and the motor-side second opening are provided at positions displaced from each other in the circumferential direction of the drive shaft. According to this structure, the motor-side first opening and the motor-side second opening can be used as an opening for flowing the cooling liquid to the motor cooling chamber and an opening for flowing the cooling liquid to the heat exchange chamber.
  • the fourth casing part preferably extends along the lower surface of the motor
  • the second flow path extends in the radial direction of the drive shaft along the lower surface of the motor between the third casing part and the fourth casing part, and has one end and the other end respectively of the cooling liquid circulation pump chamber and It includes a motor lower flow path connected to the motor cooling chamber.
  • the motor can be cooled from the lower side by the cooling liquid flowing in the motor lower flow path.
  • the second housing portion is preferably the heat exchange chamber in the axial direction of the drive shaft.
  • the position is formed so as to overlap the position of the oil chamber in the axial direction of the drive shaft.
  • the heat exchange chamber and the oil chamber do not overlap each other in the axial direction of the drive shaft, and the heat exchange chamber and the oil chamber are arranged along the drive shaft as compared with the case where the heat exchange chamber and the oil chamber are arranged along the drive shaft.
  • the length can be shortened. That is, the device can be downsized in the axial direction.
  • the heat exchange chamber restricts the flow of the cooling liquid that has flowed in from the outside in the radial direction of the drive shaft to flow along the drive shaft, and causes the coolant to flow out from the outside in the radial direction.
  • the guide member restricts the flow of the cooling liquid so that the cooling liquid flows along the drive shaft (the circumferential direction of the drive shaft) during driving, and the cooling liquid can flow along the pump chamber. The flow of the cooling liquid in the heat exchange chamber can be rectified.
  • the guide member includes a plurality of rib portions radially extending in the radial direction, having a gap at a radially inner end of the drive shaft, which serves as a part of the flow path of the cooling liquid.
  • the flow path of the cooling liquid in the heat exchange chamber can be made into a shape including the folded portion by the rib portion, so that the flow path of the cooling liquid in the heat exchange chamber can be lengthened and The heat exchange with the liquid in the pump chamber can be performed more effectively.
  • a storage chamber arranged between the motor and the oil chamber, and a liquid level sensor for detecting a predetermined liquid level of the liquid stored in the storage chamber.
  • the heat exchange chamber is preferably provided on the outer side in the radial direction of the pump chamber. According to this structure, a large heat transfer area between the heat exchange chamber and the pump chamber can be secured by using substantially the entire outer circumference of the pump casing, so that heat can be effectively exchanged. In addition, heat can be effectively exchanged between the coolant in the heat exchange chamber and the fluid outside the submersible pump. Further, even in the case of a vertical submersible pump, the heat exchange chamber can be arranged at a relatively low position, so even if the water level outside the submersible pump is lower, the cooling liquid in the heat exchange chamber and the submersible pump can be It is possible to more effectively exchange heat with the external fluid.
  • the length of the drive shaft is shortened as compared with the case where the heat exchange chamber and the pump chamber are arranged along the drive shaft without the heat exchange chamber and the pump chamber overlapping in the axial direction of the drive shaft. be able to. That is, the device can be downsized in the axial direction.
  • a submersible pump can be provided.
  • FIG. 1 is a schematic view showing a submersible pump according to a first embodiment of the present invention.
  • FIG. 3 is an exploded perspective view showing a cross section of the casing of the submersible pump according to the first embodiment of the present invention.
  • FIG. 3 is a side view showing the oil housing of the submersible pump according to the first embodiment of the present invention.
  • FIG. 4 is a sectional view taken along the line 1000-1000 in FIG. 3.
  • FIG. 3 is a plan view showing the cooling casing of the submersible pump according to the first embodiment of the present invention. It is the schematic which showed the submersible pump by 2nd Embodiment of this invention. It is the schematic which showed the submersible pump by 3rd Embodiment of this invention.
  • FIG. 8 is a schematic view showing a submersible pump according to a fifth embodiment of the present invention.
  • FIG. 11 is a schematic partially enlarged view showing a submersible pump according to a sixth embodiment of the present invention.
  • FIG. 9 is a schematic view showing a submersible pump according to a seventh embodiment of the present invention. It is a top view of the cooling casing of the submersible pump by a 7th embodiment of the present invention, and is a figure corresponding to Drawing 5.
  • FIG. 8 is a schematic view showing a submersible pump according to a fifth embodiment of the present invention.
  • FIG. 11 is a schematic partially enlarged view showing a submersible pump according to a sixth embodiment of the present invention.
  • FIG. 9 is a schematic view showing a submersible pump according to a seventh embodiment of the present invention. It is a top view of the cooling casing of the submersible pump by a 7th embodiment of the present invention, and is a figure corresponding to Drawing 5.
  • FIG. 8 is
  • FIG. 9 is a schematic view showing a submersible pump according to an eighth embodiment of the present invention. It is a top view of the cooling casing of the submersible pump by an 8th embodiment of the present invention, and is a figure corresponding to Drawing 5.
  • FIG. 9 is a schematic view showing a submersible pump according to a ninth embodiment of the present invention.
  • FIG. 17 is a sectional view taken along the line 1100-1100 of FIG. 16.
  • FIG. 17 is a sectional view taken along the line 1200-1200 in FIG. 16.
  • the submersible pump 100 includes a motor 10, a head cover 11, a pump chamber 12, a pump casing 13, an impeller 14, an oil chamber 15, and a housing 2.
  • a cooling liquid circulation unit 3 provided in the housing unit 2 and a seal member 4 are provided.
  • the seal member 4 is provided in the heat exchange chamber 31 of the cooling liquid circulation unit 3 which will be described later.
  • the seal member 4 has a watertight structure with respect to the outside and prevents liquid from entering from the pump chamber 12 side. That is, the seal member 4 prevents the cooling liquid from being contaminated by the water infiltrated from the pump chamber 12 side.
  • Submersible pump 100 is an internal cooling type pump. Specifically, the submersible pump 100 is configured to cool the motor 10 with the cooling liquid circulated by the cooling liquid circulation unit 3. The submersible pump 100 is configured to perform heat exchange between the cooling liquid and the liquid in the pump chamber 12 in the heat exchange chamber 31. That is, the submersible pump 100 is configured to cool the cooling liquid in the heat exchange chamber 31.
  • the cooling liquid is water to which glycol is added, for example.
  • the submersible pump 100 can be used even in an environment in which the water level of the liquid around the submersible pump 100 is lowered depending on the situation and the submersible pump 100 is exposed.
  • the submersible pump 100 can be used even in the same environment as a land pump that is always exposed.
  • the submersible pump 100 is a vertical pump in which the drive shaft 10a of the motor 10 extends in the vertical direction.
  • the axial direction of the drive shaft 10a of the motor 10 is the Z direction (vertical direction). Of the Z directions, the upper side is the Z1 direction and the lower side is the Z2 direction. Further, the radial direction of the drive shaft 10a is defined as the A direction. Of the A directions, the direction facing the outside in the radial direction of the drive shaft 10a is the A1 direction, and the direction opposite to the A1 direction is the A2 direction.
  • the motor 10 is sealed so that liquid from the outside does not enter.
  • the motor 10 includes a drive shaft 10a, a stator 10b, a rotor 10c, and a motor frame 10d.
  • the motor 10 is configured to rotationally drive the impeller 14 connected to the drive shaft 10a via the drive shaft 10a.
  • the motor 10 is an inner rotor motor in which the stator 10b is arranged on the outer side (A1 direction side) in the radial direction of the rotor 10c and is attached to the inner side of the motor frame 10d.
  • the rotor 10c is attached to the drive shaft 10a, and is configured to rotate together with the drive shaft 10a by the magnetic field from the stator 10b.
  • the rotor 10c is configured to drive the impeller 14 to rotate via the drive shaft 10a.
  • the drive shaft 10a is rotatably supported by bearings 16a and 16b.
  • the bearing 16a is supported on the Z1 direction side of the motor 10 by a head cover 11 of the housing 2 described later.
  • the bearing 16b is supported on the Z2 direction side of the motor 10 by a bearing cover 21 of the housing 2 which will be described later.
  • the motor 10 from the Z1 direction side along the drive shaft 10a (Z direction), the motor 10, the cooling liquid circulation pump chamber 34 of the cooling liquid circulation unit 3 described later, the oil chamber 15, the heat exchange chamber 31, and the pump chamber 12 are They are arranged in order.
  • An impeller 14 driven by the motor 10 is arranged in the pump chamber 12.
  • the pump chamber 12 is provided in the pump casing 13.
  • the pump casing 13 is provided with a suction port 13a for liquid (such as dirty water) and a discharge port 13b.
  • the pump casing 13 is arranged below the housing 2 (Z2 direction side).
  • the impeller 14 When the impeller 14 rotates, the impeller 14 sucks the water in the drainage area in which the submersible pump 100 is arranged from the suction port 13a into the pump casing 13 (the pump chamber 12), and sucks the sucked water in the discharge port 13b (generally A1. Direction).
  • the oil chamber 15 is arranged between the motor 10 and the pump chamber 12, and is filled with oil.
  • the oil chamber 15 includes a mechanical seal 15a and an electrode sensor 15b.
  • the mechanical seal 15a has a sliding portion on each of the load side (the pump chamber 12 side, that is, the Z2 direction side) and the anti-load side (the opposite side to the pump chamber 12, that is, the Z1 direction side).
  • the load side sliding portion has a function of suppressing the pressure water in the pump chamber 12 from flowing into the oil chamber 15.
  • the anti-load side sliding portion has a function of suppressing the liquid containing the oil in the oil chamber 15 from flowing into the cooling liquid circulation pump chamber 34.
  • the sliding portion is lubricated by the oil filled in the oil chamber 15 and cooled so as not to burn.
  • the mechanical seal 15a Since the mechanical seal 15a has a small gap between the fixed ring and the rotary ring forming the mechanical seal 15a, even if the mechanical seal 15a is functioning normally, the mechanical seal 15a is pumped into the oil chamber 15 slightly. Liquid penetrates from the chamber 12.
  • the electrode type sensor 15b is configured to be able to detect the infiltration of liquid from the pump chamber 12 into the oil chamber 15.
  • the electrode type sensor 15b is configured to detect the infiltration of the liquid by energizing the oil housing 23 with the oil housing 23 due to the infiltration of the liquid into the oil chamber 15.
  • the cooling liquid circulating unit 3 is configured to circulate the cooling liquid in the pump body between the pump chamber 12 and the head cover 11 in order to cool the motor 10.
  • the cooling liquid circulation unit 3 is configured so that the oil in the oil chamber 15 does not mix with the cooling liquid.
  • the cooling liquid circulation unit 3 is provided in the motor cooling chamber 30, the heat exchange chamber 31 (the space in which the cooling liquid is cooled), the first flow passage 32, the second flow passage 33, and the second flow passage 33.
  • a cooling liquid circulation pump chamber 34 is provided.
  • the cooling liquid circulation unit 3 includes a cooling liquid circulation pump chamber 34, a downstream flow passage of the cooling liquid circulation pump chamber 34 of the second flow passage 33 (a motor lower flow passage 33b described later), a motor cooling chamber 30, a
  • the cooling liquid is circulated in the order of the first flow path 32, the heat exchange chamber 31, and the upstream flow path (flow path 33a described later) of the cooling liquid circulation pump chamber 34 of the second flow path 33, and again for cooling liquid circulation. It is configured to return to the pump chamber 34.
  • the casing 2 includes a water jacket 20, a bearing cover 21, a cooling housing 22, an oil housing 23, an oil casing 24, and a cooling casing 25.
  • the bearing cover 21 is an example of the “fourth housing part” in the claims.
  • the cooling housing 22 is an example of the “third housing part” in the claims.
  • the oil casing 24 is an example of the "partitioning member” in the claims.
  • the oil housing 23 is an example of the "first housing portion" in the claims.
  • the cooling casing 25 is an example of the “second casing part” in the claims.
  • the first flow path 32 and the second flow path 33 have a bearing cover 21, a cooling housing 22, an oil housing 23, an oil casing 24, and a cooling casing 25 with respect to the pump chamber 12 (pump casing 13).
  • the cooling casing 25, the oil casing 24, the oil housing 23, the cooling housing 22, and the bearing cover 21 are stacked in this order from the Z2 direction side toward the Z1 direction side.
  • the casing 2 is provided with a seal member (for example, an O-ring) at each portion so that the cooling liquid, the oil in the oil chamber 15, the atmosphere, and the liquid in the pump chamber 12 do not mix with each other. Has been.
  • the respective parts (water jacket 20, bearing cover 21, cooling housing 22, oil housing 23, cooling casing 25) constituting the housing part 2 excluding the oil casing 24 generally have substantially outer diameters (sizes in the A direction) with each other. They are formed to be the same.
  • the bearing cover 21 extends in the radial direction (direction A) of the drive shaft 10a along the lower surface of the motor 10 (excluding the drive shaft 10a).
  • the heat exchange chamber 31 side (Z2 direction side) of the oil housing 23 is open, and the oil chamber 15 is provided.
  • the cooling casing 25 is open on the oil housing 23 side (Z1 direction side) and is provided with a heat exchange chamber 31.
  • the oil casing 24 is arranged between the oil housing 23 and the cooling casing 25, and partitions the oil housing 23 and the cooling casing 25. That is, the oil casing 24 prevents the oil in the oil chamber 15 and the cooling liquid in the heat exchange chamber 31 from being mixed with each other.
  • the motor cooling chamber 30 is provided in the water jacket 20, and is arranged adjacent to the motor 10 so as to cover the motor 10 from the outer peripheral side (A1 direction side). That is, the motor cooling chamber 30 is a cylindrical space portion.
  • the motor cooling chamber 30 includes a partition wall 30a, an inner cooling chamber 30b, and an outer cooling chamber 30c.
  • the partition wall 30a has a cylindrical shape extending upward from the lower end (Z2 direction side end), and is a plate-shaped wall that partitions the motor cooling chamber 30 into an inner cooling chamber 30b and an outer cooling chamber 30c.
  • the partition wall portion 30a has a gap at the upper end (Z1 direction side end portion).
  • the inner cooling chamber 30b is arranged inside the partition wall portion 30a (A2 direction side).
  • the outer cooling chamber 30c is arranged outside the partition wall portion 30a (on the A1 direction side).
  • the inner cooling chamber 30b and the outer cooling chamber 30c communicate with each other through a gap at the upper end of the partition wall portion 30a.
  • the upper end of the partition wall portion 30a is located on the Z1 direction side with respect to the stator 10b and the rotor 10c of the motor 10.
  • the inner cooling chamber 30b is in communication with the second flow path 33 (motor lower flow path 33b described later) (inflow port 21a described later provided in the bearing cover 21) at the lower end (Z2 direction side end portion). Therefore, the inner cooling chamber 30b is configured to effectively cool the motor 10 by causing the cooling liquid from the heat exchange chamber 31 to flow along the motor 10.
  • the outer cooling chamber 30c is in communication with the first flow path 32 (outflow port 21b, which will be described later, provided in the bearing cover 21) at the lower end. Therefore, the outer cooling chamber 30c is configured to be able to effectively cool the heated cooling liquid by drawing heat from the motor 10 to the liquid surrounding the submersible pump 100 or the atmosphere before sending it to the heat exchange chamber 31.
  • a plurality of (three) inflow ports 21a and a plurality (three) of outflow ports 21b are provided in the bearing cover 21 arranged adjacent to the Z2 direction side of the water jacket 20.
  • the inlet 21a is an example of the "motor-side first opening” in the claims.
  • the outlet 21b is an example of the "motor-side second opening” in the claims.
  • the inflow port 21a connects the second flow path 33 to the motor cooling chamber 30 (inner cooling chamber 30b) so that the cooling liquid flows from the second flow path 33 into the motor cooling chamber 30 (inner cooling chamber 30b). It is configured.
  • the outlet 21b connects the first flow passage 32 to the motor cooling chamber 30 (outer cooling chamber 30c) so that the cooling liquid flows out from the motor cooling chamber 30 (outer cooling chamber 30c) to the first flow passage 32. It is configured.
  • the inflow port 21a and the outflow port 21b have an arc shape and are arranged at positions displaced from each other in the A direction. That is, the inflow port 21a is arranged closer to the A2 direction side than the outflow port 21b.
  • the plurality of inflow ports 21a and the plurality of outflow ports 21b are arranged alternately in the circumferential direction of the drive shaft 10a (see FIG. 1) at substantially equal angular intervals while being offset from each other in the A direction. That is, the motor cooling chamber 30 (see FIG. 1) causes the motor 10 (see FIG.
  • FIG. 2 shows only one side configuration of the vertical cross-sectional shape of the cooling liquid circulation unit 3 and the casing unit 2, the other side configuration of the vertical cross-sectional shape not shown has the same shape as the one-side configuration ( The shape is symmetrical with respect to the cross section).
  • the heat exchange chamber 31 is provided in the cooling casing 25.
  • the heat exchange chamber 31 is arranged adjacent to the Z1 direction side of the pump chamber 12.
  • the heat exchange chamber 31 is arranged adjacent to the Z2 direction side of the oil chamber 15.
  • the heat exchange chamber 31 is configured to exchange heat between the cooling liquid and the liquid in the pump chamber 12 by flowing the cooling liquid.
  • the oil housing 23 is provided with a plurality (three) of inlets 23a and a plurality (three) of outlets 23b.
  • the inflow port 23a is configured to connect the first flow path 32 to the heat exchange chamber 31 and allow the cooling liquid to flow from the first flow path 32 into the heat exchange chamber 31 (see FIG. 1).
  • the outlet 23b is configured to communicate the second flow path 33 with the heat exchange chamber 31 and allow the cooling liquid to flow from the heat exchange chamber 31 to the second flow path 33.
  • the inflow port 23a and the outflow port 23b have an arc shape, and are arranged at positions corresponding to each other in the A direction without being displaced from each other in the A direction.
  • the inflow port 23a and the outflow port 23b are arranged near the outer end of the heat exchange chamber 31 in the A1 direction.
  • the plurality of inflow ports 23a and the plurality of outflow ports 23b are arranged alternately in the circumferential direction of the drive shaft 10a at substantially equal angular intervals.
  • the heat exchange chamber 31 includes a plurality of rib portions 31a.
  • the plurality of rib portions 31a regulate the flow of the cooling liquid that has flowed in from the outer inflow port 23a in the radial direction (direction A) to flow along the drive shaft 10a (circumferential direction of the drive shaft 10a), and also in It is configured to flow out from the outer outlet 23b.
  • the plurality of ribs 31a have radial gaps at the inner ends in the radial direction that are a part of the flow path in the heat exchange chamber 31 for the cooling liquid. That is, the plurality of ribs 31a partition the heat exchange chamber 31 into a plurality of spaces arranged in the circumferential direction so as to have a fan shape in a plan view.
  • the cooling liquid that has flowed into the heat exchange chamber 31 from the inflow port 23a (first flow path 32) flows through the fan-shaped space toward the inner side in the radial direction (A2 direction side) and also inside the rib portion 31a.
  • the plurality of ribs 31 a can circulate the cooling liquid efficiently by regulating (regulating) the flow of the cooling liquid. As a result, the heat exchange chamber 31 can effectively cool the cooling liquid.
  • a plurality of (three) first flow paths 32 are provided outside the oil chamber 15 in the radial direction (direction A) of the drive shaft 10a (see FIG. 1).
  • the first flow path 32 connects the heat exchange chamber 31 and the motor cooling chamber 30 (see FIG. 1).
  • one end (Z2 direction side end) of the first flow path 32 communicates with the heat exchange chamber 31 via the inflow port 23a, and the other end (Z1 direction side end) via the outflow port 21b. It communicates with the motor cooling chamber 30.
  • the first flow path 32 is configured to flow the cooling liquid from the motor cooling chamber 30 to the heat exchange chamber 31.
  • the first flow path 32 extends in the axial direction (Z direction) of the drive shaft 10 a along the outer periphery of the oil chamber 15 on the outer side in the radial direction of the oil chamber 15.
  • the first flow path 32 is provided across the bearing cover 21, the cooling housing 22, and the oil housing 23.
  • the first flow path 32 extends linearly along the axial direction (Z direction) of the drive shaft 10a.
  • first flow path 32, the outlet 21b, and the inlet 23a are arranged at positions corresponding to each other in a plan view.
  • the plurality of first flow paths 32 are arranged near the outer ends of the bearing cover 21, the cooling housing 22, and the oil housing 23 in the A1 direction, and are arranged at substantially equal angular intervals in the circumferential direction of the drive shaft 10a. They are arranged side by side.
  • a plurality of (three) second flow paths 33 are provided outside the oil chamber 15 in the radial direction (direction A) of the drive shaft 10a (see FIG. 4).
  • the second flow path 33 is arranged inside the first flow path 32 in the radial direction (direction A).
  • the second flow path 33 connects the heat exchange chamber 31 and the motor cooling chamber 30.
  • one end (Z2 direction side end) of the second flow path 33 communicates with the heat exchange chamber 31 via the outflow port 23b, and the other end (Z1 direction side end) via the inflow port 21a. It communicates with the motor cooling chamber 30.
  • the second flow passage 33 is configured to flow the cooling liquid in the direction opposite to the first flow passage 32 (from the heat exchange chamber 31 to the motor cooling chamber 30).
  • the second flow path 33 is, similarly to the first flow path 32, on the outer side (A1 direction side) in the radial direction of the oil chamber 15 along the outer circumference of the oil chamber 15 in the axial direction (Z direction) of the drive shaft 10a. It is extended.
  • a cooling liquid circulation pump chamber 34 in which a cooling liquid circulation impeller 34a that generates a flow of the cooling liquid in the cooling liquid circulation unit 3 is arranged is provided in the middle of the flow passage.
  • the cooling liquid circulation impeller 34a is attached to the drive shaft 10a of the motor 10 (see FIG. 1) and is configured to be driven (rotated) by the motor 10.
  • the cooling liquid circulation impeller 34a is configured to generate a flow in the Z1 direction along the drive shaft 10a when driven.
  • the cooling liquid circulation pump chamber 34 (cooling liquid circulation impeller 34 a) is arranged between the motor 10 (excluding the drive shaft 10 a) and the oil chamber 15.
  • the cooling liquid circulation impeller 34a is an axial flow impeller that allows the cooling liquid to flow in and out along the axial direction (Z direction) of the drive shaft 10a.
  • the second flow path 33 includes a flow path 33 a provided upstream of the cooling liquid circulation pump chamber 34 and a motor lower flow path provided downstream of the cooling liquid circulation pump chamber 34. 33b and.
  • the cooling liquid is sent from the heat exchange chamber 31 to the motor cooling chamber 30 by causing the cooling liquid to flow in the order of the flow passage 33a, the cooling liquid circulation pump chamber 34, and the motor lower flow passage 33b. It is configured.
  • the flow path 33a includes a first portion 133a extending in the axial direction (Z direction) of the drive shaft 10a and a first portion 133a extending inward in the radial direction (A2 direction side) of the drive shaft 10a from the Z1 direction side end portion of the first portion 133a. It has two parts 133b.
  • the first portion 133a is provided in the oil housing 23 in the shape of a through hole.
  • the second portion 133b is provided between the oil housing 23 and the cooling housing 22.
  • the motor lower flow path 33b extends along the lower surface of the motor 10 (a portion excluding the drive shaft 10a) to the outer side (A1 direction side) in the radial direction of the drive shaft 10a.
  • the motor lower flow path 33b is provided between the bearing cover 21 and the cooling housing 22.
  • One end on the upstream side of the motor lower flow path 33b is connected to the coolant circulation pump chamber 34.
  • the other end on the downstream side of the motor lower flow path 33b is connected to the motor cooling chamber 30 (inner cooling chamber 30b).
  • the second flow path 33 allows the cooling liquid from the heat exchange chamber 31 to flow inside the drive shaft 10a in the radial direction (A2 direction side) along the oil chamber 15 (the upper portion of the oil chamber 15) by the second portion 133b. It is configured to flow into the cooling liquid circulation pump chamber 34. Further, the second flow path 33 drives the cooling liquid flowing out from the cooling liquid circulation pump chamber 34 by the cooling liquid circulation impeller 34a along the lower surface of the motor 10 (a portion excluding the drive shaft 10a). It is configured to flow to the outside (A1 direction side) in the radial direction of the shaft 10a.
  • the cooling liquid flows into the motor cooling chamber 30. That is, the second flow path 33 is configured to flow the cooling liquid in opposite directions in the radial direction (direction A) on the upstream side and the downstream side of the cooling liquid circulation impeller 34a.
  • the oil housing 23 includes an oil exchange hole 23c for exchanging oil.
  • the oil exchange hole 23c communicates the atmosphere (outside the submersible pump 100) with the oil chamber 15. Specifically, in the oil housing 23, the oil exchange hole 23c and the first flow path 32 and the second flow path 33 provided in the oil housing 23 do not overlap each other in a plan view (when viewed from the Z direction). It is configured.
  • the oil exchange hole 23c extends in a direction (direction A) orthogonal to the axial direction of the drive shaft 10a.
  • the oil exchange hole 23c is arranged at a substantially intermediate position of the oil housing 23 in the Z direction.
  • One oil exchange hole 23c is provided on each side of the drive shaft 10a with the drive shaft 10a interposed therebetween.
  • the oil casing 24 includes a cylindrical convex portion 24a protruding in the Z2 direction along the drive shaft 10a (see FIG. 1).
  • the convex portion 24a is formed with an annular groove portion 24b which is recessed inward in the radial direction (A2 direction side) and surrounds the periphery of the drive shaft 10a.
  • the seal member 4 is attached to the groove 24b.
  • a heat exchange chamber 31 (cooling liquid) is arranged on one side of the seal member 4, and a pump chamber 12 (liquid such as dirty water) is arranged on the other side of the seal member 4.
  • the seal member 4 is composed of, for example, an O-ring.
  • the cooling casing 25 includes an annular recess 25a that surrounds the drive shaft 10a that engages with the protrusion 24a of the oil casing 24 from the Z2 direction side.
  • the seal member 4 seals between the pump chamber 12 and the heat exchange chamber 31 in a watertight manner by being in contact with the inner surface of the convex portion 24a while being attached to the groove portion 24b.
  • seal member 4 Since the seal member 4 is provided between the cooling casing 25 and the oil casing 24, which are stationary with respect to each other, unlike the mechanical seal 15a provided on the rotationally driven drive shaft 10a, heat It is possible to almost certainly prevent the liquid from entering the exchange chamber 31 from the pump chamber 12.
  • a seal member 4a is provided between the oil housing 23 and the oil casing 24.
  • the seal member 4a provides a watertight seal between the oil chamber 15 and the heat exchange chamber 31. As a result, the seal member 4a prevents the oil in the oil chamber 15 from entering the heat exchange chamber 31.
  • the seal member 4a is composed of, for example, an O-ring.
  • the seal member 4a is an example of the "seal structure" in the claims.
  • a seal member 4b is provided between the oil housing 23 and the cooling casing 25.
  • the seal member 4b makes a watertight seal between the atmosphere and the heat exchange chamber 31.
  • the seal member 4b is composed of, for example, an O-ring.
  • the seal member 4b is an example of the "seal structure" in the claims.
  • An oil seal (not shown) may be provided on the top of the pump chamber 12 in the Z1 direction along the lower surface of the drive shaft 10a and the cooling casing 25 in the Z2 direction. The oil seal can prevent the liquid from rising from the pump chamber 12 to the Z1 direction side.
  • the optimum liquid can be selected as each liquid for cooling the motor 10 and lubricating the mechanical seal 15a. .. Further, even when the liquid in the pump chamber 12 enters through the mechanical seal 15a, the liquid (oil) in the oil chamber 15 can be contaminated first, so that the contamination of the cooling liquid can be prevented. As described above, the optimum liquids can be selected as the liquids for cooling the motor 10 and for lubricating the mechanical seal 15a, and the contamination of the cooling liquid can be suppressed.
  • the heat exchange chamber 31 is provided with the watertight sealing structure (sealing members 4, 4a, 4b) with respect to the outside.
  • the seal structure effectively prevents the liquid or air from entering the heat exchange chamber 31 from the outside of the heat exchange chamber 31 such as the pump chamber 12 side, the atmosphere side, and the oil chamber 15 side. Can be prevented. As a result, it is possible to further suppress the contamination of the cooling liquid.
  • the cooling liquid circulation impeller 34a for the cooling liquid driven by the motor 10 is arranged, and cooling provided in the second flow path 33 between the motor 10 and the oil chamber 15 is performed.
  • a liquid circulation pump chamber 34 is further provided.
  • the cooling liquid circulation pump chamber 34 can be arranged at a position farther than the oil chamber 15 with respect to the pump chamber 12 along the drive shaft 10a. It can be the oil chamber 15. As a result, it is possible to further suppress the contamination of the cooling liquid.
  • the first flow path 32 and the second flow path 33 are located outside the drive shaft 10a of the oil chamber 15 in the radial direction and along the outer periphery of the oil chamber 15 along the drive shaft 10a. Extends in the axial direction.
  • the first flow passage 32 and the second flow passage 32 are compared with the case where the first flow passage 32 and the second flow passage 33 extend in the direction intersecting the axial direction of the drive shaft 10a around the oil chamber 15. Since the length of the flow path with the motor 33 can be shortened, the loss of energy in the flow path can be reduced and the motor 10 can be cooled efficiently.
  • the second flow path 33 is arranged inside the first flow path 32 in the radial direction of the drive shaft 10a, and the cooling liquid circulation impeller 34a allows the second flow path 33 to move from the heat exchange chamber 31.
  • the cooling liquid of (1) is made to flow into the cooling liquid circulation pump chamber 34, and the cooling liquid made to flow out of the cooling liquid circulation pump chamber 34 is made to flow to the motor cooling chamber 30.
  • the cooling liquid cooled in the heat exchange chamber 31 can be made to flow in the second flow passage 33 that is closer to the motor 10 than the first flow passage 32 in the radial direction of the drive shaft 10a, which is effective. Therefore, the motor 10 can be cooled.
  • one oil housing 23 including the oil exchange hole 23c that communicates the atmosphere with the oil chamber 15 and the oil chamber 15 is further provided.
  • the labor for assembling the plurality of casing parts can be saved as compared with the case where the oil exchange holes are provided over the plurality of casing parts. Further, the number of seal members required to prevent oil leakage can be reduced.
  • the oil exchange hole 23c and the first flow path 32 and the second flow path 33 provided in the oil housing 23 do not overlap each other in plan view. It is configured. As a result, it is possible to prevent the flow of the cooling liquid in the first flow path 32 and the second flow path 33 from being obstructed by the oil exchange hole 23c, and it is possible to prevent the structure of the oil housing 23 from becoming complicated. ..
  • At least one first flow path 32 is provided, is arranged on the outer side of the drive shaft 10a in the second flow path 33 in the radial direction, and surrounds the drive shaft 10a in a plan view. Is formed in an arc shape surrounding the. As a result, the shape of the first flow path 32 can be made a shape along the outer periphery of the motor 10.
  • the heat exchange chamber 31 side is opened and the oil housing 23 in which the oil chamber 15 is provided, and the cooling casing 25 in which the oil housing 23 side is opened and the heat exchange chamber 31 is provided are provided. Further provided is an oil casing 24 arranged between the oil housing 23 and the cooling casing 25 and separating the oil chamber 15 and the heat exchange chamber 31, and the seal structure is provided between the oil casing 24 and the oil housing 23. And a seal member 4a for water-tightly sealing the space between the pump chamber 12 and the heat exchange chamber 31. This makes it possible to seal the space between the oil chamber 15 and the heat exchange chamber 31 in a watertight manner by the seal member 4a and prevent the coolant from being contaminated by the oil.
  • a bearing cover 21 provided between the cooling housing 22 and the motor 10, and the first flow path 32 and the second flow path 33 are provided in the oil chamber 23 and the cooling casing 25 with respect to the pump chamber 12.
  • the cooling housing 22 and the bearing cover 21 are formed by stacking the cooling casing 25, the oil housing 23 to which the oil casing 24 is attached, the cooling housing 22 and the bearing cover 21 in this order.
  • the pump main body can be easily assembled simply by stacking the oil housing 23, the cooling casing 25, the cooling housing 22 and the bearing cover 21 in this order on the cooling casing 25, the oil housing 23, the cooling housing 22 and the bearing cover 21. ..
  • the bearing cover 21 has the inlet 21a that communicates the second flow path 33 with the motor cooling chamber 30, and the outlet 21b that communicates the first flow path 32 with the motor cooling chamber 30.
  • the inflow port 21a and the outflow port 21b are provided at positions displaced from each other in the circumferential direction of the drive shaft 10a. Thereby, the inflow port 21a and the outflow port 21b can be used as an opening for flowing the cooling liquid to the motor cooling chamber 30 and an opening for flowing the cooling liquid to the heat exchange chamber 31.
  • the bearing cover 21 extends along the lower surface of the motor 10, and the second flow path 33 forms the lower surface of the motor 10 between the cooling housing 22 and the bearing cover 21.
  • a motor lower flow path 33b that extends in the radial direction of the drive shaft 10a and has one end and the other end connected to the cooling liquid circulation pump chamber 34 and the motor cooling chamber 30, respectively. Thereby, the motor 10 can be cooled from the lower side by the cooling liquid flowing through the motor lower flow path 33b.
  • the heat exchange chamber 31 restricts the flow of the cooling liquid that has flowed in from the outer side in the radial direction of the drive shaft 10a to flow along the drive shaft 10a, and from the outer side in the radial direction. It includes a rib portion 31a to be discharged.
  • the rib portion 31a restricts the flow of the cooling liquid and allows the cooling liquid to flow along the driving shaft 10a (in the circumferential direction of the driving shaft 10a) during driving, and allows the cooling liquid to flow along the pump chamber 12. Therefore, the heat exchange chamber The flow of the cooling liquid in 31 can be rectified.
  • the plurality of rib portions 31a that radially extend in the radial direction are provided at the radially inner end of the drive shaft 10a, with a gap that is a part of the flow path of the cooling liquid. .. Since the rib portion 31a allows the flow path of the cooling liquid in the heat exchange chamber 31 to have a shape including folding, the flow path of the cooling liquid in the heat exchange chamber 31 is lengthened, and the cooling liquid and the pump chamber 12 are provided. The heat exchange with the liquid can be performed more effectively.
  • the submersible pump 200 includes a storage chamber 51 and a liquid level sensor 52 provided in the storage chamber 51.
  • the storage chamber 51 is arranged between the motor 10 (excluding the drive shaft 10a) and the oil chamber 15. Specifically, the storage chamber 51 is arranged between the coolant circulation pump chamber 34 and the oil chamber 15.
  • the submersible pump 200 includes a lid member 53 that is attached to the oil housing 23 from above to form the storage chamber 51.
  • the liquid level sensor 52 is a float type sensor, and is configured to detect a predetermined liquid level of the liquid (oil and liquid from the pump chamber 12) that has flown into the storage chamber 51 and is stored therein.
  • the second portion 133b of the flow path 33a of the second flow path 33 is disposed adjacent to the Z1 direction side of the storage chamber 51.
  • the submersible pump 200 is configured to be able to stop the motor 10 and notify the user when the liquid level sensor 52 detects a predetermined liquid level in the storage chamber 51. As a result, the submersible pump 200 can suppress mixing of other liquids with the cooling liquid in the cooling liquid circulating unit 3.
  • the storage chamber 51 disposed between the motor 10 and the oil chamber 15, and the liquid level sensor that detects the predetermined liquid level of the liquid that has flowed into and stored in the storage chamber 51. 52 is further provided. This makes it possible to prevent the liquid from rising to the motor 10 side by the storage chamber 51. Further, the liquid level sensor 52 can detect oil rising and water ingress into the storage chamber 51. As a result, it is possible to reliably perform the maintenance work before oil rises or water ingress to the motor 10. Further, by providing the liquid level sensor 52 on the upper side of the oil chamber 15, not only the water immersion from the pump chamber 12 to the oil chamber 15 but also the oil rising from the oil chamber 15 to the upper portion can be detected early.
  • the submersible pump 300 includes a storage chamber 351 and a liquid level sensor 352 provided in the storage chamber 351.
  • the storage chamber 351 is arranged between the motor 10 (excluding the drive shaft 10a) and the oil chamber 15. Specifically, the storage chamber 351 is arranged between the motor 10 (excluding the drive shaft 10a) and the cooling liquid circulation pump chamber 34.
  • the submersible pump 300 includes a lid member 353 attached to the bearing cover 21 from below to form a storage chamber 351.
  • the liquid level sensor 352 is a float type sensor, and is configured to detect a predetermined liquid level of the liquid (the cooling liquid, the oil, and the liquid from the pump chamber 12) that has flowed into and stored in the storage chamber 351. There is. On the Z2 direction side of the storage chamber 351, the motor lower side flow passage 33b of the second flow passage 33 is arranged adjacently.
  • the submersible pump 300 is configured to be able to stop the motor 10 and notify the user when the liquid level sensor 352 detects a predetermined liquid level in the storage chamber 351. As a result, the submersible pump 300 can suppress liquid from entering the motor 10 (inside the motor frame 10d).
  • the storage chamber 351 and the liquid level sensor 352 are provided immediately below the motor 10 (excluding the drive shaft 10a). This makes it possible to detect the most important oil rise and water ingress to the motor 10 immediately before.
  • the submersible pump 400 includes one first flow path 432, one second flow path 433, a heat exchange chamber 431, and an oil housing 423.
  • the first flow path 432 is arranged outside the drive shaft 10a of the second flow path 433 in the radial direction (A1 direction side).
  • the first flow path 432 is formed in an arc shape (C-shape) surrounding the periphery of the drive shaft 10a in a plan view (as viewed from the Z1 direction side) (see FIG. 9).
  • An oil exchange hole 23c is arranged in the C-shaped open portion of the first flow path 432.
  • the second flow path 433 is also formed in an arc shape (C-shape) similar to that of the first flow path 432 in plan view (as viewed from the Z1 direction side) (see FIG. 9 ). Therefore, the first flow path 432 and the second flow path 433 are formed so as to surround substantially the entire circumference of the oil chamber 15.
  • the heat exchange chamber 431 includes a flat plate-shaped horizontal rib portion 431a extending in a direction (horizontal direction) intersecting the axial direction (Z direction) of the drive shaft 10a.
  • the horizontal rib portion 431a has a gap at the end on the A2 direction side, and forms a flow path of the cooling liquid that is folded back in the vertical direction at the end on the A2 direction side.
  • the horizontal rib portion 431a is an example of the "guide member" in the claims.
  • the first flow path 432 and the second flow path 433 are formed so as to surround substantially the entire circumference of the oil chamber 15. This allows the cooling liquid to flow into the heat exchange chamber 431 from substantially the entire circumference of the oil chamber 15, so that a large heat transfer area between the cooling liquid in the heat exchange chamber 431 and the liquid in the pump chamber 12 can be secured. it can. As a result, heat exchange between the cooling liquid and the liquid in the pump chamber 12 can be effectively performed.
  • At least one first flow path 432 is provided, is arranged on the outer side of the second flow path 433 in the radial direction of the drive shaft 10a, and surrounds the drive shaft 10a in a plan view. Is formed in an arc shape (C-shape) surrounding the. Thereby, the configuration of the first flow path 432 can be simplified.
  • the oil casing 24 and the cooling casing 25 are separately provided one by one (that is, the oil casing 24 and the cooling casing 25 are separate bodies), which is different from the first embodiment described above.
  • An example in which the cooling casing 25 and the cooling casing 25 are integrally formed will be described.
  • the same components as those in the above-described first embodiment are designated by the same reference numerals as those in the first embodiment, are shown in the drawings, and their description is omitted.
  • the submersible pump 500 includes a casing 525 configured by integrally forming (the portion of) the oil casing 24 and (the portion of) the cooling casing 25. ..
  • the casing 525 is an example of the “seal structure” and the “integral structure” in the claims.
  • the submersible pump 500 has no gap between (the part of) the oil casing 24 and (the part of) the cooling casing 25, and unlike the submersible pump 100 of the first embodiment, the seal member 4 is not provided.
  • the heat exchange chamber 31 side is opened and the oil housing 23 in which the oil chamber 15 is provided, and the cooling casing 25 in which the oil housing 23 side is opened and the heat exchange chamber 31 is provided are provided. Further provided is an oil casing 24 arranged between the oil housing 23 and the cooling casing 25 and partitioning the oil chamber 15 and the heat exchange chamber 31, and the sealing structure integrally includes the cooling casing 25 and the oil casing 24. Includes formed casing 525. This can improve the water tightness of the heat exchange chamber 31 by reducing the number of places where sealing is required. As a result, the device configuration can be further simplified.
  • the submersible pump 600 includes a cooling fluid circulation impeller 634a.
  • the cooling fluid circulation impeller 634a is attached to the drive shaft 10a of the motor 10 and is configured to be driven (rotated) by the motor 10.
  • the cooling liquid circulation impeller 634a has the same shape as the cooling liquid circulation impeller 34a (see FIG. 1) of the first embodiment and is arranged at the same position. Is attached to the drive shaft 10a in the upside down direction. Therefore, the cooling fluid circulation impeller 634a is configured to generate a flow in the Z2 direction (oil chamber 15) along the drive shaft 10a when driven.
  • the second flow path 33 is arranged inside the first flow path 32 in the radial direction of the drive shaft 10a, and is separated from the motor cooling chamber 30 by the cooling liquid circulation impeller 634a.
  • the cooling liquid of (1) is made to flow into the cooling liquid circulation pump chamber 34, and the cooling liquid made to flow out of the cooling liquid circulation pump chamber 34 is made to flow to the heat exchange chamber 31.
  • the cooling liquid circulation impeller 634a allows the cooling liquid to flow toward the heat exchange chamber 31 side opposite to the motor 10 (excluding the drive shaft 10a), so that the motor 10 side has a negative pressure. As a result, it is possible to effectively prevent water from entering the motor 10.
  • the seventh embodiment differs from the first embodiment in which the oil chamber 15 and the heat exchange chamber 31 are arranged side by side in the axial direction (Z direction) of the drive shaft 10a, and the oil chamber 15 and the heat exchange chamber 731 are separated from each other.
  • An example in which the drive shafts 10a are arranged side by side in the radial direction (direction A) will be described.
  • the same components as those in the above-described first embodiment are designated by the same reference numerals as those in the first embodiment, are shown in the drawings, and their description is omitted.
  • the submersible pump 700 includes a cooling casing 725 and a heat exchange chamber 731.
  • the cooling casing 725 has a circular opening 725a inside the drive shaft 10a in the radial direction (A2 direction side), and the oil casing 24 is fitted into the opening. Therefore, the heat exchange chamber 731 is arranged on the outer side (A1 direction side) in the radial direction of the drive shaft 10a.
  • the cooling casing 725 is formed such that the position of the heat exchange chamber 731 in the axial direction (Z direction) of the drive shaft 10a overlaps the position of the oil chamber 15 in the axial direction of the drive shaft 10a. That is, the heat exchange chamber 731 and the oil chamber 15 are arranged side by side.
  • the cooling casing 725 is formed so that the position of the heat exchange chamber 731 in the axial direction overlaps with the position of the oil chamber 15 in the axial direction.
  • the heat exchange chamber 731 and the oil chamber 15 do not overlap with each other in the axial direction of the drive shaft 10a, and compared with the case where the heat exchange chamber 731 and the oil chamber 15 are arranged along the drive shaft 10a.
  • the length of the shaft 10a can be shortened. That is, the device can be downsized in the axial direction.
  • FIGS. 14 and 15 an eighth embodiment will be described with reference to FIGS. 14 and 15.
  • the eighth embodiment is different from the seventh embodiment and will be described as an example in which one first flow path 832 is provided as in the fourth embodiment.
  • the same components as those of the above-described seventh embodiment are designated by the same reference numerals as those of the seventh embodiment, are shown in the drawings, and their description is omitted.
  • the submersible pump 800 includes one first flow path 832, a heat exchange chamber 831, and a cooling casing 825.
  • the first flow path 832 is arranged outside the drive shaft 10a of the second flow path 833 in the radial direction (A1 direction side).
  • the first flow path 832 is formed in an arc shape (C shape) surrounding the periphery of the drive shaft 10a in a plan view (as viewed from the Z1 direction side) (see FIG. 9 ).
  • An oil exchange hole 23c is arranged in the C-shaped open portion of the first flow path 832.
  • the heat exchange chamber 831 includes a flat plate-shaped horizontal rib portion 831a extending in a direction (horizontal direction) intersecting the axial direction (Z direction) of the drive shaft 10a.
  • the horizontal rib portion 831a has a gap at the end on the A2 direction side, and forms a flow path of the cooling liquid that is folded back in the vertical direction at the end on the A2 direction side.
  • the horizontal rib portion 831a is an example of the "guide member" in the claims.
  • a plurality of (six) openings 825a connected in the circumferential direction of the drive shaft 10a and connected to the first flow path 832 are provided in the upper portion of the cooling casing 825. Further, by combining the cooling casing 825 and the oil casing 24, inside the opening 825a in the radial direction (A2 direction side), in the upper part of the cooling casing 825, the drive shaft 10a is arranged in the circumferential direction, and the second flow A plurality of (six) openings 826 connected to the passage 833 are formed. In addition, an opening 825b that is arranged on the downstream side of the opening 825a and communicates with the opening 825a is provided in the middle of the flow path forming the heat exchange chamber 831.
  • the ninth embodiment is different from the first embodiment in which the heat exchange chamber 31 is arranged between the pump chamber 12 and the oil chamber 15 in the Z direction, and is different from the radial outside of the pump chamber 12 (A1 direction side).
  • An example of arranging the heat exchange chamber 931 will be described.
  • the same components as those in the above-described first embodiment are designated by the same reference numerals as those in the first embodiment, are shown in the drawings, and their description is omitted.
  • the submersible pump 900 includes a cooling casing 925, a heat exchange chamber 931 and a pump casing 913.
  • the cooling casing 925 includes an upper cooling casing 925a and a lower cooling casing 925b.
  • the upper cooling casing 925a is arranged on the outer side (A1 direction side) in the radial direction of the pump casing 913 and surrounds the upper portion of the pump casing 913.
  • the lower cooling casing 925b is arranged on the outer side (A1 direction side) in the radial direction of the pump casing 913 and surrounds the lower portion of the pump casing 913.
  • the pump casing 913 is composed of two members, a main body member 913a that surrounds the impeller 14 and a pipe member 913b that forms a liquid discharge channel.
  • the heat exchange chamber 931 is provided outside the pump chamber 12 in the radial direction (A1 direction side) so as to surround substantially the entire circumference of the pump chamber 12. Specifically, the heat exchange chamber 931 is provided between the pump casing 913 and the cooling casing 925. Note that the impeller 14 is not shown in FIG.
  • the heat exchange chamber 931 has a plurality of rib portions 931a extending radially in a plan view and a plurality of (six) regions arranged in the circumferential direction.
  • the heat exchange chamber 931 includes a plurality (three) areas 931b and a plurality (three) areas 931c.
  • the rib portion 931a is an example of the "guide member" in the claims.
  • the area 931b is configured so that the cooling liquid flows from the first flow path 32 and flows downward (Z2 direction).
  • the region 931c is configured such that the cooling liquid flows in from the region 931b at the end in the Z2 direction, flows upward (in the Z1 direction), and flows out to the second flow path 33.
  • the area 931b and the area 931c are partitioned by the rib portion 931a and are arranged alternately in the circumferential direction.
  • the rib portion 931a is provided on the outer circumference of each of the pump casing 913 and the oil casing 24.
  • seal member 4c As shown in FIG. 16, a plurality (two) of seal members 4c are provided between the pump casing 913 and the cooling casing 925.
  • the seal member 4c makes a watertight seal between the atmosphere and the heat exchange chamber 931.
  • the seal member 4c is composed of, for example, an O-ring.
  • the seal member 4c is an example of the "seal structure" in the claims.
  • a seal member 4d is provided between the pump casing 913 and the oil casing 24.
  • the seal member 4d makes a watertight seal between the pump chamber 12 and the heat exchange chamber 931.
  • the seal member 4d is composed of, for example, an O-ring.
  • the seal member 4d is an example of the "seal structure" in the claims.
  • a seal member 4e is provided between the main body member 913a and the pipe member 913b.
  • the seal member 4e seals between the pump chamber 12 and the heat exchange chamber 931 in a watertight manner.
  • the seal member 4e is composed of, for example, an O-ring.
  • the seal member 4e is an example of the "seal structure" in the claims.
  • a seal member 4f is provided between the upper cooling casing 925a and the lower cooling casing 925b.
  • the seal member 4f seals the atmosphere and the heat exchange chamber 931 in a watertight manner.
  • the seal member 4f is made of packing, for example.
  • the seal member 4f is an example of the "seal structure" in the claims.
  • the heat exchange chamber 931 is provided outside the pump chamber 12 in the radial direction (A1 direction side) so as to surround the pump chamber 12. This makes it possible to secure a large heat transfer area between the heat exchange chamber 931 and the pump chamber 12 by using substantially the entire outer circumference of the pump casing 913, so that heat can be effectively exchanged. Further, heat can be effectively exchanged between the cooling liquid in the heat exchange chamber 931 and the fluid outside the submersible pump 900. Further, since the heat exchange chamber 931 can be arranged at a relatively low position, even if the water level outside the submersible pump 900 is lower, the cooling liquid between the heat exchange chamber 931 and the fluid outside the submersible pump 900 can be separated.
  • the heat exchange chamber 931 and the pump chamber 12 do not overlap each other in the axial direction of the drive shaft 10a, and the length of the drive shaft 10a is longer than that in the case where the heat exchange chamber and the pump chamber are arranged along the drive shaft.
  • the length can be shortened. That is, the device can be downsized in the axial direction.
  • the submersible pump is a vertical pump
  • the present invention is not limited to this.
  • the submersible pump may be a horizontal pump.
  • the number of the first flow paths (second flow paths) is one or three is shown, but the present invention is not limited to this. In the present invention, the number of first flow paths (second flow paths) may be two or four or more.
  • cooling liquid circulation pump chamber cooling liquid circulation impeller
  • the cooling liquid circulation pump chamber cooling liquid circulation impeller
  • the cooling liquid circulation pump chamber may be provided, for example, between the oil chamber and the pump chamber.
  • the present invention is not limited to this.
  • the first flow path may not be linearly extended in the axial direction of the drive shaft, but may be bent between the heat exchange chamber and the motor cooling chamber.
  • the cooling liquid is made to flow from the inside of the motor cooling chamber
  • the present invention is not limited to this.
  • the cooling liquid may be introduced from the outside of the motor cooling chamber.
  • first to eighth embodiments examples in which all the configurations corresponding to the first housing portion, the second housing portion, the third housing portion, and the fourth housing portion of the present invention are provided are shown.
  • the present invention is not limited to this.
  • the present invention may include only a part of the first housing portion, the second housing portion, the third housing portion, and the fourth housing portion of the present invention.
  • the present invention is not limited to this.
  • the electrode type sensor may not be provided in the oil chamber.
  • an electrode type sensor or a float type liquid level sensor may be provided in the motor to detect water immersion into the motor.
  • an axial flow type impeller is provided as the cooling liquid circulation impeller, but the present invention is not limited to this.
  • an impeller of a system different from the axial flow type such as a centrifugal type impeller may be provided as the cooling liquid circulation impeller.
  • the rib portion is radially formed in a plan view
  • the present invention is not limited to this.
  • the rib portion may be formed in a meandering shape or an arc shape in a plan view.
  • an example in which an O-ring is used as a seal member has been shown, but the present invention is not limited to this.
  • an elastic member other than the O-ring may be used as the seal member.
  • the heat exchange chamber is arranged above the pump chamber, and in the ninth embodiment, the heat exchange chamber is arranged outside the pump chamber in the radial direction.
  • the present invention is not limited to this.
  • the heat exchange chamber may be arranged both on the upper side of the pump chamber and on the outer side in the radial direction of the pump chamber.
  • the heat exchange chamber is provided around the entire outer circumference of the pump casing, but the present invention is not limited to this.
  • the heat exchange chamber may be provided so as to partially overlap the outer circumference of the pump casing.
  • the pump casing is composed of two members, a main body member that surrounds the impeller and a pipe member that forms a liquid discharge flow path, has been shown. It is not limited to this.
  • the main body member that surrounds the impeller and the pipe member that forms the liquid discharge channel may be integrally configured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2019/046595 2018-11-30 2019-11-28 水中ポンプ WO2020111186A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020207036765A KR102515508B1 (ko) 2018-11-30 2019-11-28 수중 펌프
SG11202012607XA SG11202012607XA (en) 2018-11-30 2019-11-28 Submersible Pump
CN201980053523.3A CN112567137A (zh) 2018-11-30 2019-11-28 潜水泵

Applications Claiming Priority (2)

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JP2018224639A JP7067443B2 (ja) 2018-11-30 2018-11-30 水中ポンプ
JP2018-224639 2018-11-30

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KR (1) KR102515508B1 (zh)
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SG (1) SG11202012607XA (zh)
TW (1) TWI785289B (zh)
WO (1) WO2020111186A1 (zh)

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TWI757908B (zh) * 2020-10-07 2022-03-11 祥昇機電工業有限公司 抽水機耐空轉構造
US20220109351A1 (en) * 2020-10-05 2022-04-07 Hyundai Motor Company Motor cover structure

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KR102308037B1 (ko) * 2020-12-30 2021-09-30 윤홍태 가스 누출 방지 기능을 갖는 펌프
KR102412538B1 (ko) * 2021-08-05 2022-06-23 김대운 오일 냉각장치 및 이를 이용한 질화로

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TWI757908B (zh) * 2020-10-07 2022-03-11 祥昇機電工業有限公司 抽水機耐空轉構造

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SG11202012607XA (en) 2021-02-25
TW202032013A (zh) 2020-09-01
JP2020084952A (ja) 2020-06-04
TWI785289B (zh) 2022-12-01
KR20210095560A (ko) 2021-08-02
CN112567137A (zh) 2021-03-26
KR102515508B1 (ko) 2023-03-29
JP7067443B2 (ja) 2022-05-16

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