KR101862732B1 - Surface liquid recovery device - Google Patents

Surface liquid recovery device Download PDF

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Publication number
KR101862732B1
KR101862732B1 KR1020147023543A KR20147023543A KR101862732B1 KR 101862732 B1 KR101862732 B1 KR 101862732B1 KR 1020147023543 A KR1020147023543 A KR 1020147023543A KR 20147023543 A KR20147023543 A KR 20147023543A KR 101862732 B1 KR101862732 B1 KR 101862732B1
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South Korea
Prior art keywords
liquid
surface layer
impeller
drive shaft
rotary drive
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KR1020147023543A
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Korean (ko)
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KR20150016203A (en
Inventor
히데오 야마모토
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고와 엠텍 가부시키가이샤
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • 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
    • F04D13/066—Floating-units
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Removal Of Floating Material (AREA)

Abstract

A suction port portion configured to suck the surface layer liquid (surface layer liquid) of the liquid following the liquid level of the liquid in the liquid tank; and a suction portion for sucking the surface layer liquid flowing from the suction port portion, And a conveying pump for conveying the separated liquid to a separating unit for separating into a foreign substance, wherein the conveying pump includes a direct current brushless motor as a driving unit for driving the conveying pump.

Figure R1020147023543

Description

SURFACE LIQUID RECOVERY DEVICE

The present invention relates to a surface layer (surface layer liquid) collecting apparatus. The surface layer recovery apparatus is used to separate mechanical oil, foreign matter, and the like floating on the surface layer liquid of the cutting liquid from the surface layer liquid due to, for example, a difference in specific gravity between the liquid and a liquid such as a cutting liquid.

As such a surface layer liquid recovery apparatus of this kind, the techniques described in Patent Documents 1 and 2 have been proposed. These surface layer liquid recovery devices are used by being connected to a separation tank. The separation tank is for separating a machine oil or foreign matter (hereinafter, simply referred to as " foreign matter ") from a surface layer liquid such as a cutting liquid. The surface layer recovery device is connected to the separation tank so as to transfer (transfer) the surface layer liquid to the separation tank.

The surface layer recovery apparatus includes an inlet port portion adapted to suck the surface layer liquid of the liquid following the level of the liquid surface and a transfer pump for transferring the surface layer liquid introduced from the inlet port portion to the separation tank. As an electric motor for driving the feed pump, an AC induction voltage such as a capacitor-driven motor or a three-phase three-phase induction voltage generator is employed.

However, in recent years, a cutting liquid tank for a machine tool, which is one object using a surface layer liquid recovery apparatus of this kind, tends to be downsized or made low in water level. Therefore, with the miniaturization of the cutting fluid tank for a machine tool or the lowering of the water surface, the surface layer recovery apparatus is required to be downsized.

However, in general, an AC induced voltage generator is used for the surface layer recovery device, and the AC induced voltage generator is low efficiency. Therefore, in order to secure the efficiency required as the feed pump, the corresponding AC induced voltage is used. As a result, the AC induction voltage becomes larger and the AC induction voltage becomes larger. For this reason, it has been difficult to miniaturize the surface layer liquid collecting apparatus in the surface layer liquid collecting apparatus using the AC induced voltage unit.

Japanese Patent No. 4291873 Japanese Patent No. 4347409

Accordingly, it is an object of the present invention to provide a surface layer liquid recovering device capable of achieving downsizing.

The surface-layer-liquid recovery apparatus of the present invention comprises: a suction port section configured to follow a liquid level of a liquid surface in a liquid tank to suck a surface layer liquid of the liquid; and a surface layer liquid introduced from the suction port section, Which is an outer case for forming a driving section accommodating area for accommodating the driving section, and a transfer pump having an impeller for transferring the transfer section to a separating section for separating the driving section into foreign matters, A DC brushless motor serving as a driving unit for driving the feed pump, and a sealing device for suppressing the intrusion of foreign matter into the drive unit side, wherein the feed pump is provided with a partition wall And a rotary drive shaft through which a through hole is inserted, wherein the impeller is mounted on the rotary drive shaft, And an annular concave portion for inserting the corner portions is formed in the partition wall. The sealing device includes a disk-shaped seal body and an annular lip and a lip seal is formed on an inner side of the leg portion so as to surround an outer peripheral portion of the insertion hole in the radially outer side of the insertion hole Section).

As an aspect of the surface-layer-liquid recovery apparatus of the present invention, the DC brushless motor may have a rotary drive shaft, and the rotary drive shaft may be rotatably supported around the shaft center by a slide bearing .

As another aspect related to the surface layer-liquid recovery apparatus of the present invention, the structure in which the rotary drive shaft is formed of ceramic may be adopted.

According to another aspect of the present invention, the transfer pump is provided with an impeller, the impeller is connected to the rotary drive shaft so as to rotate around the rotary drive shaft, and the impeller is connected to the DC brushless motor A sealing device for suppressing the penetration of foreign matter in the impeller can be adopted between the impeller and the rotary drive shaft.

According to another aspect of the present invention, there is provided a surface-layer-liquid recovery apparatus, comprising: an end side portion having the impeller therein; a side end portion having the DC brushless motor therein; Wherein the impeller is mounted on the one end of the rotary drive shaft having one end and the other end, and the one end of the rotary drive shaft is disposed within the one end side of the rotary drive shaft, Is inserted into the insertion hole of the partition so that the other end of the partition is disposed in the other end side portion, and the sealing device is provided between the impeller and the partition.

According to another aspect of the surface-layer-liquid recovery apparatus of the present invention, the impeller has a side surface and an insertion concave portion formed on the side surface, and the sealing device is mounted in the insertion concave portion.

According to another aspect of the present invention, the sealing apparatus includes a disk-shaped seal body and an annular lip seal protruding from a side surface of the seal body, Wherein the impeller has a side surface and an insertion concave portion formed in the side surface, the chamber body is accommodated in the insertion concave portion, and the lip chamber has an outer periphery of the insertion hole of the partition wall, (Outer circumferential portion) of the base member.

According to another aspect of the present invention, the impeller includes a side surface and a leg portion projecting from the side surface, and the partition wall has an annular annular recess formed in an outer peripheral portion of the insertion hole And each of the legs is inserted into the annular recess.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a use state diagram of a surface layer liquid recovery apparatus showing an embodiment of the present invention. FIG.
2 is an enlarged cross-sectional view of the surface-layer-liquid recovery device.

Hereinafter, a surface layer liquid recovery apparatus according to an embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. As shown in these drawings, the surface layer liquid recovery apparatus 1 sucks the surface layer liquid 3 out of the liquid (cutting liquid) in the liquid tank (cutting liquid tank for machine tool) 2, (Hereinafter referred to as " separation tank ") 4 for separating foreign matter from the separation tank 3. The surface layer liquid recovery apparatus 1 is provided with an apparatus main body 5, an inlet port 8, a suction pipe 9, and a transfer pump 10.

The apparatus main body 5 is integrally formed by one end side portion 15 and the other end side portion 17. The one side end portion 15 is an outer case that forms the liquid transfer region 14. The other end side portion 17 is an outer case for forming a drive portion receiving area 16 for receiving the drive portion of the feed pump 10. [

The side portion 15 and the other end side portion 17 are partitioned by a partition 18. The partition 18 is composed of an annular portion 19 and a cover portion 20. The annular portion 19 is fixed by sandwiching the outer peripheral portion between the opposing faces of the one end side portion 15 and the other end side portion 17. The cover portion 20 is attached to the annular portion 19 by screwing it into a central opening formed at the center of the annular portion 19. [

A through hole 23 is formed at the center of the cover portion 20 so that one end side of the rotary drive shaft 13 of the transfer pump 10 can be inserted so as to protrude from the liquid transfer region 14. An annular concave portion 24 for inserting each corner portion 11a of the impeller 11 of the transfer pump 10 is formed in the outer peripheral portion of the insertion hole 23 on one end face of the cover portion 20, (Not shown). Thus, the impeller 11 is supported on the rotary drive shaft 13 in a cantilever manner.

The mounting recess 21 for mounting the bearing 29 of the transfer pump 10 is formed on the outer peripheral surface of the insertion hole 23 on the other end surface of the cover portion 20, Respectively. The mounting recess 21 is formed so as to communicate with the insertion hole 23. A cylindrical portion 25 extending from the partition wall 18 toward the inside of the other end side portion 17 of the apparatus main body 5 is integrally formed on the partition wall 18 as a member concentric with the other end side portion 17 .

The liquid transfer region 14 is an internal space of the one end side portion 15 of the one end side portion 15 and the other end side portion 17 which are mounted with the partition 18 therebetween and the surface layer liquid 3 is introduced into the suction port portion 8) and transferring the liquid to the separation tank (separation unit) 4. The one side end portion 15 is used as a region for housing the impeller 11. [

The other end side portion 17 of the apparatus main body 5 forms the drive portion receiving area 16 in which the drive portion 12 for rotationally driving the impeller 11 is incorporated and also the case of the drive portion 12 . A mounting concave portion 22 for mounting the bearing 30 is formed at the center of the inner wall 26 of the cylindrical portion 25.

The suction port portion 8 is mounted on the upper portion of the bellows cylinder 6 and configured to follow the water level of the liquid level 7 in the basin 2 by the expansion and contraction operation of the bellows cylinder 6. [ The upper portion of the suction port portion 8 is an opening, and the surface layer liquid is sucked from the opening. The suction pipe 9 is structured so that one end side portion 15 of the apparatus main body 5 and the lower portion of the bellows cylinder 6 are communicatively connected. The suction pipe (9) is formed in an elbow pipe shape so as to open upward and laterally. The suction pipe 9 has an end opened upward and communicated with the lower portion of the bellows cylinder 6 and an end opened toward the side is connected to the suction side mounting portion 15 formed at the one end side portion 15 of the apparatus main body 5, (35).

The transfer pump 10 is disposed inside the apparatus main body 5. The transfer pump 10 is provided with the impeller 11 and the drive unit 12 for rotationally driving the impeller 11 around its axis. The impeller 11 rotates around the axis and functions to transfer the surface layer 3 to the bellows cylinder 6 and the one end side portion 15 from the inlet port portion 8 and to feed the surface layer liquid 3 toward the separation tank 4 side . The driving unit 12 includes an inner rotor type DC brushless motor. The DC brushless motor includes a rotary drive shaft 13, a permanent magnet 27 disposed on the outer periphery of the rotary drive shaft 13, an induction coil 28 disposed on the outer periphery of the permanent magnet 27, And a bearing (29, 30) receiving the bearing (13).

The rotary drive shaft 13 is made of ceramic and is inserted into the insertion hole 23 formed at the center of the cover portion 20. [ The impeller 11 is fixed to one end of the rotary drive shaft 13 protruding to the liquid transfer region 14 from the outside. An intermediate portion of the rotary drive shaft 13 is rotatably supported around the shaft center by the bearing 29 incorporated in the mounting recess 21 of the cover portion 20. [ The other end of the rotary drive shaft 13 is rotatably supported around the shaft center by the bearing 30 mounted on the mounting concave portion 22 of the seam 26 of the cylindrical portion 25. [ Each of the bearings 29, 30 is a slide bearing. The permanent magnet 27 is fixed to the outer peripheral portion of the body portion 25a of the cylindrical portion 25. The permanent magnet 27 and the induction coil 28 are disposed so as to oppose each other in the radial direction with the body portion 25a of the cylindrical portion 25 interposed therebetween.

The surface-layer-liquid recovery apparatus (1) includes a sealing device (31). The sealing device 31 suppresses the intrusion of foreign matter into the driving part 12 side. A sealing device (not shown) is provided between the impeller 11 and the rotary drive shaft 13 and between the impeller 11 and the cover part 20 so as to suppress the intrusion of foreign matter into the drive part 12 (inside the cylindrical part 25) (31) are provided. An insertion concave portion 34 for mounting the sealing device 31 is formed on the radially inner side of the corner portion 11a on the side surface of the impeller 11. The sealing device 31 is formed in an annular shape and is inserted so as to sandwich the rotary drive shaft 13 from the outside. The sealing device 31 is integrally formed by a disc-like seal body 32 and an annular lip chamber 33 projecting from one side of the seal body 32 side. When the lip chamber 33 of the sealing device 31 is in contact with the outer peripheral portion of the insertion hole 23, it is possible to suppress the entry of the foreign matter from the insertion hole 23.

The apparatus main body 5 and the separation tank 4 are communicatively connected by a discharge pipe 37 mounted on the discharge side mounting portion 36 of the one end side portion 15 formed in the apparatus main body 5. [ The separating tank 4 is connected to a recycling pipe (return pipe) 38 for returning the surface layer 3 to the basin 2. To the driving unit 12, a power cord 39 for electrically connecting the driving unit 12 to a DC power source (not shown) is connected.

In the above-described configuration, a DC brushless motor is used as the driving unit (electric motor) 12. Therefore, the surface layer-liquid recovery apparatus 1 has an advantage that it can be used in a limited use place that does not have a commercial power source.

When the power cord 39 is connected to the DC power source and the drive unit 12 is driven, the impeller 11 rotates together with the rotary drive shaft 13, and the lift force of the feed pump 10 causes the suction port The surface layer liquid 3 containing the mechanical oil or the like is sucked from the suction port portion 8 while following the level of the liquid surface 7. The surface liquid 3 is sucked from the bellows cylinder 6 into the liquid transferring region 14 and then from the liquid transferring region 14 to the discharge pipe 37 and then into the separating tank 4 . The mechanical oil or the like is removed (separated) by the difference in specific gravity in the separation tank 4 and the surface layer 3 from which the mechanical oil or the like is removed is returned from the recirculating pipe 38 back to the liquid tank 2 . The impeller 11 has a structure in which the cantilever is supported on the rotary drive shaft 13. When the surface layer 3 moves from the liquid transfer region 14 to the discharge tube 37, There is no. Therefore, the surface layer 3 can be moved very smoothly. By repeating the above operation, the surface layer 3 is always kept in a state in which foreign substances are removed, and the liquid (cutting liquid) in the basin 2 can be used in a good state.

 A DC brushless motor is smaller than an AC induction voltage generator such as a capacitor-driven motor of the same efficiency or a three-phase three-phase induction voltage generator. Therefore, the entire surface-layer liquid collecting apparatus 1 can be downsized while securing the efficiency of the transfer pump necessary for the recovery of the surface layer 3.

When the cutting fluid of the machine tool is the surface layer liquid 3, the surface layer liquid 3 contains not only the mechanical oil but also metal powder (magnetic powder such as iron powder) generated when the machine tool is cut. A direct current brushless motor is used as the driving unit 12 of the surface layer liquid recovery apparatus 1 and a permanent magnet 27 is incorporated in the cylindrical portion 25. When the metal powder mixed in the surface layer 3 adheres to the permanent magnet 27, the efficiency of the transfer pump 10 is lowered or is not driven. However, in the surface layer liquid recovery apparatus 1, the sealing device 31 is provided between the impeller 11 and the rotary drive shaft 13 and between the impeller 11 and the cover part 20. [ Therefore, the state in which the mechanical oil or the foreign matter enters the drive unit 12 can be reliably suppressed, the efficiency of the transfer pump 10 can be prevented from lowering, and the failure can be prevented.

Above, the surface layer-liquid recovery apparatus 1 according to the present embodiment includes the suction port portion 8 configured to suck the surface layer liquid 3 following the liquid level of the liquid in the liquid tank 2, And a transfer pump 10 for transferring the surface layer liquid 3 introduced from the transfer chamber 8 to a separation tank 4 for separating the surface layer 3 into liquid and foreign substances mixed in the liquid, A DC brushless motor is provided as a driving unit for driving the feed pump 10.

Therefore, the driving pump 10 is driven by the driving of the DC brushless motor so that the surface layer liquid 3 of the liquid in the basin 2 is sucked from the suction port portion 8 and the surface layer liquid 3, (4) and separated into a liquid and a foreign substance. DC brushless motors are smaller than AC induction voltage generators, such as capacitor-driven motors of the same efficiency, and three-phase three-phase induction voltage generators. Therefore, after the entire surface layer liquid recovery apparatus 1 is miniaturized, the efficiency of the transfer pump necessary for the recovery of the surface layer liquid 3 is secured. In addition, by using a DC brushless motor, it is possible to use the surface layer liquid collecting apparatus 1 by using a battery even in a place where there is no commercial power source.

In the surface layer liquid recovery apparatus 1 of the present embodiment, the DC brushless motor has a rotary drive shaft 13, and the rotary drive shaft 13 is supported by a slide bearing so as to be rotatable around the axial center. Therefore, the surface layer liquid recovery apparatus 1 (drive unit 12) is not easily affected by foreign matter. Therefore, the failure of the surface layer liquid recovering apparatus 1 can be suppressed to such an extent that the service life becomes long.

Further, in the surface layer liquid recovery apparatus 1 of the present embodiment, the rotary drive shaft 13 is formed of ceramic. Therefore, the surface layer liquid recovery apparatus 1 (drive unit 12) is not easily affected by foreign matter. Therefore, the failure of the surface layer liquid recovering apparatus 1 can be suppressed to such an extent that the service life becomes long.

 In the surface layer liquid recovery apparatus 1 of the present embodiment, the transfer pump 10 is provided with an impeller 11. The impeller 11 is rotatably supported on the rotary drive shaft 13 so as to rotate around the rotary drive shaft 13 A sealing device 31 is provided between the impeller 11 and the rotary drive shaft 13 for suppressing the penetration of foreign matter into the DC brushless motor.

With this configuration, it is possible to suppress the entry of foreign matter into the DC brushless motor side by the sealing device 31, so that the failure of the transfer pump 10 due to the foreign matter can be suppressed, Lt; / RTI >

In the surface layer-liquid recovery apparatus 1 of the present embodiment, the one end side portion 15 incorporating the impeller 11, the other end side portion 17 containing the DC brushless motor, the one end side portion 15, (13) having one end and the other end of the impeller (11), and the apparatus main body (5) having a partition wall (18) And is attached to the insertion hole 23 of the partition 18 so that one end of the rotary drive shaft 13 is disposed in the one end side portion 15 and the other end portion of the rotary drive shaft 13 is disposed in the other end side portion 17 And the sealing device 31 is provided between the impeller 11 and the partition 18.

According to this configuration, the sealing characteristic is improved, the state in which the foreign matter intrudes into the driving unit 12 side can be reliably suppressed, the efficiency of the transfer pump 10 can be prevented from lowering, .

In the surface layer liquid recovery apparatus 1 of the present embodiment, the impeller 11 has a side surface and an insertion concave portion 34 formed on a side surface thereof, and the sealing device 31 has an insertion concave portion 34, Respectively. This configuration improves the sealability and reliably suppresses the state in which the foreign matter intrudes into the drive unit 12, thereby preventing the efficiency of the transfer pump 10 from deteriorating and preventing the failure .

In the surface layer-liquid recovery apparatus 1 of the present embodiment, the sealing device 31 includes a disk-like seal body 32 and an annular lip chamber 33 projecting from the side surface of the seal body 32 And the impeller 11 has a side surface and an insertion concave portion 34 formed on the side surface thereof and the seal body 32 has an insertion concave portion 34, And the lip chamber 33 is in contact with the outer peripheral portion of the insertion hole 23 of the partition 18.

This configuration improves the sealability and reliably suppresses the state in which the foreign matter intrudes into the drive unit 12, thereby preventing the efficiency of the transfer pump 10 from deteriorating and preventing the failure .

In the surface layer liquid recovery apparatus 1 of this embodiment, the impeller 11 has a side surface and a corner portion 11a protruding from the side surface. The partition wall 18 has an annular shape formed in the outer peripheral portion of the insertion hole 23 And an annular concave portion 24, and each corner portion 11a is inserted into the annular concave portion 24.

This configuration improves the sealability and reliably suppresses the state in which the foreign matter intrudes into the drive unit 12, thereby preventing the efficiency of the transfer pump 10 from deteriorating and preventing the failure .

The surface-layer-liquid recovery apparatus 1 according to the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist of the present invention. Furthermore, the surface-layer-liquid recovery apparatus 1 according to the present invention is not limited to the above-described operational effects.

1: Surface layer liquid recovery device 2:
3: Surface layer 4: Separation tank
5: Device body 7: liquid level
11: impeller 12:
13: rotation drive shaft 14: liquid transfer area
15: one side portion 16:
17: other end side portion 18: partition wall
21: mounting recess 22: mounting recess
23: insertion hole 28: induction coil
29, 30: Bearing 31: Sealing device
34: insertion recess

Claims (8)

A suction port configured to suck the surface layer liquid (surface layer liquid) of the liquid following the liquid level of the liquid surface in the liquid tank;
A transfer pump having an impeller for transferring the surface layer liquid introduced from the suction port section to a separation section for separating the surface layer liquid into a liquid and foreign matters mixed in the liquid;
An apparatus main body in which one end side which is an outer case for forming a liquid-transporting region and the other end side portion which is an outer case forming a driving section accommodating region for accommodating the driving section is disposed through the partition wall;
A direct current brushless motor which is a driving unit for driving the feed pump; And
A sealing device for suppressing intrusion of foreign matter into the driving part side;
And,
Wherein the transfer pump has a rotary drive shaft through which a through hole formed in the partition wall is inserted,
Wherein the impeller is disposed on the one end side in a state of being mounted on the rotary drive shaft,
Wherein the impeller has an annular leg portion on the side of the partition wall, an annular concave portion for inserting the corner portion is formed on the partition wall,
The sealing device comprises a disk-shaped seal body and an annular lip chamber,
An annular insertion concave portion for inserting the seal body is formed on an inner side in the radial direction of the corner portion of the impeller,
Wherein the lip chamber is provided on an inner side of the leg portion and in contact with an outer peripheral portion (outer peripheral portion) of the insertion hole,
Surface layer recovery device. The method according to claim 1,
Wherein the rotary drive shaft is rotatably supported around the shaft center by a slide bearing. 3. The method of claim 2,
Wherein the rotary drive shaft is formed of ceramic. delete delete delete delete delete
KR1020147023543A 2012-06-05 2012-06-05 Surface liquid recovery device KR101862732B1 (en)

Applications Claiming Priority (1)

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PCT/JP2012/064453 WO2013183114A1 (en) 2012-06-05 2012-06-05 Surface liquid recovery device

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KR101862732B1 true KR101862732B1 (en) 2018-05-30

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WO (1) WO2013183114A1 (en)

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CN104302579A (en) 2015-01-21
JP5956574B2 (en) 2016-07-27
HK1203922A1 (en) 2015-11-06
KR20150016203A (en) 2015-02-11
WO2013183114A1 (en) 2013-12-12

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