KR101821856B1 - Coolant supplying device having return pipe for returing leaked oil - Google Patents

Coolant supplying device having return pipe for returing leaked oil Download PDF

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Publication number
KR101821856B1
KR101821856B1 KR1020150094320A KR20150094320A KR101821856B1 KR 101821856 B1 KR101821856 B1 KR 101821856B1 KR 1020150094320 A KR1020150094320 A KR 1020150094320A KR 20150094320 A KR20150094320 A KR 20150094320A KR 101821856 B1 KR101821856 B1 KR 101821856B1
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KR
South Korea
Prior art keywords
cooling oil
return pipe
oil supply
pump body
recovery
Prior art date
Application number
KR1020150094320A
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Korean (ko)
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KR20170004240A (en
Inventor
장우진
장우석
Original Assignee
장우진
장우석
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Priority to KR1020150094320A priority Critical patent/KR101821856B1/en
Publication of KR20170004240A publication Critical patent/KR20170004240A/en
Application granted granted Critical
Publication of KR101821856B1 publication Critical patent/KR101821856B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0003—Arrangements for preventing undesired thermal effects on tools or parts of the machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/08—Multi-stage pumps the stages being situated concentrically

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The present invention relates to a cooling oil supply device provided with a return pipe for oil leakage recovery, comprising a cooling oil supply unit having an impeller embedded in a casing, a motor having a rotation shaft installed to rotate the impeller, And a mechanical seal installed in the pump body so as to enclose the rotating shaft, characterized in that the pump body is arranged to collect cooling oil that leaks from the mechanical seal and flows to the motor side along the rotating shaft, And a return pipe provided with a return pipe connected to the first recovering passage and the cooling oil supply portion for recovering the leakage oil collected in the first recovery passage to the cooling oil supply portion will be.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coolant supplying device having a return pipe for returning oil for returning,

The present invention relates to a cooling oil supply apparatus, and more particularly, to a cooling oil supply apparatus that includes a leaking return return pipe for leaking a part of cooling oil flowing by an impeller of a cooling oil supply unit to a pump side and recovering the leaking oil to a cooling oil supply unit To a cooling fluid supply device.

Generally, the machine tool is provided with a cooling oil supply device for cooling the heat generated during cutting and supplying cooling oil for washing the chip.

Such a cooling oil supply device is generally provided with a motor and a cooling oil supply portion provided in association with the rotation shaft of the motor to incorporate an impeller for introducing and discharging cooling oil, and a cooling oil supply portion provided between the rotation shaft and the cooling oil supply portion, And an installed mechanical seal. Accordingly, when the impeller rotates, the cooling oil flowing through the inlet provided in the cooling oil supply portion is discharged to the discharge port. At this time, the leakage of cooling oil to the motor side is blocked by the mechanical seal portion.

However, when the cooling oil supply device is repeatedly used or aged, there is a problem that the cooling oil flowing in and out is leaked to the motor side through the mechanical seal portion.

Korean Patent Publication No. 10-2013-0117154 (Published Oct. 25, 2013)

SUMMARY OF THE INVENTION An object of the present invention, which is devised to solve the above-described problems, is to provide a cooling oil supply apparatus having a leaking return pipe which is collected in a return pipe and returned to a cooling oil supply unit have.

In order to achieve the above-mentioned object, a cooling oil supply apparatus having a return pipe for returning oil leakage according to the present invention comprises a cooling oil supply unit having an impeller embedded in a casing, a motor having a rotation shaft installed to rotate the impeller, A cooling oil supply device comprising a pump body which is installed between oil supply portions and through which a rotating shaft passes, and a mechanical seal installed in the pump body so as to surround the rotating shaft, And a return pipe provided to connect the first recovery passage and the cooling oil supply section to recover the leakage oil collected in the first recovery passage to the cooling oil supply section, ; And

Here, the return pipe is installed to communicate with the flow space provided in the casing cover having the inlet port, and the oil leaked into the flow space is discharged to the discharge port provided in the pump body by the impeller.

In addition, for example, one end of the first water passage is machined so as to communicate with the space between the outer surface of the second portion having a smaller outer diameter than the first portion and the inner surface of the body body in the rotary shaft between the mechanical seal device and the motor, And is fastened to one end of the return pipe.

As another example, one end of the first water passage is machined between a sealing member provided on the first portion side in the second portion and an oil seal provided on the machine sealing device side in the second portion.

Meanwhile, for example, the cooling oil collecting part may include a connection pipe provided to communicate with the return pipe, and a second return pipe formed in the casing so that one end thereof is connected to the connection pipe and the other end is connected to the flow space, Further comprising:

 As another example, the cooling oil recovery unit further includes a check valve installed between the return pipe and the flow space, and the check valve is opened by the flow pressure of the leakage oil introduced from the return pipe.

The cooling oil collecting part includes a connection pipe provided to communicate with the check valve, and a second recovery path formed in the casing cover so that one end of the cooling oil recovery part is connected to the connection pipe and the other end thereof communicates with the flow space .

As described above, according to the present invention, there is an effect that the cooling oil leaked to the pump body without being fully sealed in the mechanical seal can be recovered to the cooling oil supply portion through the return pipe and the second recovery passage.

By providing the sealing member in the vicinity of the motor side of the first water passage, all the leaked cooling oil can be recovered.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be interpreted.
FIG. 1 is a side view schematically showing a coolant supply device provided with a return pipe for oil leakage recovery according to a preferred embodiment of the present invention.
2 is a sectional view taken along the line AA in Fig.
3 is an enlarged view of the "A"
4 is an enlarged view of the "B"

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

<Configuration>

FIG. 1 is a side view schematically showing a coolant supply device provided with a return pipe for oil leakage recovery according to a preferred embodiment of the present invention. 2 is a sectional view taken along the line A-A in Fig. 3 is an enlarged view of the "A" 4 is an enlarged view of the "B"

A cooling oil supply unit 200, a mechanical seal 300, and a cooling oil recovery unit 400. The cooling oil supply unit includes a power unit 100, a cooling oil supply unit 200, a mechanical seal 300, . Here, in the present invention, a cooling oil recovery unit 400, which is a feature of the present invention, is installed in a normal cooling oil supply device. Therefore, the power unit 100, the cooling oil supply unit 200, and the mechanical seal 300 are generally used, so that each component will be briefly described.

The power unit 100 is installed to rotate the impeller 220 of the cooling oil supply unit 200 while being supplied with external power. The power unit 100 includes a motor 120 and a rotating shaft 120 installed to rotate the impeller 220 while being rotated by the motor 110. The power unit 100 is disposed outside the motor 110, And a pump body 130 provided with a discharge port 131 to surround the pump body 130. The first recovery passage 410 processed in the pump body 130 will be described later. A bearing 140 for supporting the rotation of the rotating shaft 120 may be installed at a coupling portion between the motor 110 and the pump body 130. A portion between the bearing 140 and the mechanical seal 300 in the rotary shaft 120 is divided into a first portion 121 having a large outer diameter and a second portion 122 having a small outer diameter. .

The cooling oil supply unit 200 includes a casing 210, an impeller 220 disposed inside the casing 210 and configured to rotate by the rotation shaft 120, and a cooling oil supply unit 200 installed to close the opening side of the casing 210 opposite to the motor 110 And a casing cover 230 having an inlet 231 formed therein.

The impeller 220 is rotated by the rotation shaft 120 to cool the oil outside the casing 210 to the inlet 231 and discharge the oil to the outlet 131.

A portion of the casing 210 opposite to the casing cover 230 is sealed to the pump body 130. The casing 210 is built between the pump body 130 and the casing 210 so as to enclose the mechanical seal 300 through which the rotation axis 120 penetrates.

The casing cover 230 is provided with a fluid space 240 that is processed to allow the oil leakage from the second recovery path 450, which will be described later, to flow into the inlet 231 and the impeller 220. The flow space 240 may be communicated with the inlet 231 or may communicate with the space provided with the impeller 220 to flow toward the discharge port 131 by the impeller 220, And the space in which the impeller 220 is installed.

The mechanical seal 300 is installed to seal the joint between the rotation shaft 120 and the casing 210 disposed inside the casing 210. The mechanical seal 300 is conventional, and a detailed description thereof will be briefly described.

As shown in FIG. 2, the cooling oil recovery unit 400 is installed to recover the leaking oil that has leaked through the mechanical seal 300 to the cooling oil supply unit 200. The cooling oil recovery part 400 is installed in the pump body 130 so as to communicate with the first recovery path 410 and the first recovery path 410 processed between the mechanical seal 300 and the motor 110 A return pipe 420, a check valve 430 installed at one side of the return pipe 420 to communicate with the other side of the return pipe 420, a connecting pipe 440 connected to the other side of the check valve 430, And a second recovery passage 450 formed in the casing cover 230 so as to communicate with the flow space 240 provided in the casing cover 230. As shown in FIG.

2 and 3, one end of the first return path 410 is machined in the rear portion of the mechanical seal 300 (in the direction of the motor 110) And the other end of the return pipe 420 is installed to communicate with the one side of the return pipe 420. The outer diameter of the second portion 122 on the side of the mechanical seal 300 is smaller than the first portion 121 on the side of the motor 110 so that the outer diameter of the second portion 122 A certain space is provided between the inner diameters of the pump body 130. Of course, in order to support the center of the rotating shaft 120 in the second portion 122, a TC type oil seal 150 is provided on one side portion between the outer surface of the second portion 122 and the inner surface of the pump body 130, Respectively. The first water passage 410 is formed so that one end thereof communicates with the space between the second portion 122 and the pump body 130 and the other end is processed to face the casing cover 230 . The reason why the other end of the first return path 410 is machined to face the casing cover 230 is to minimize the length of the return pipe 420 when the return pipe 420 is disposed near the outer surface of the casing 210. 3, the first recovery passage 410 may be formed in close proximity to the boundary between the first portion 121 and the second portion 122, as shown in FIG. The first return path 410 may be a boundary between the first portion 121 and the second portion 122 and between the outer surface of the second portion 122 and the inner surface of the pump body 130, (Not shown), and may be machined between the sealing member and the oil seal 150. With this structure, almost all the cooling oil leaked from the mechanical seal 300 can be collected by the first recovery passage 410.

The return pipe 420 is detachably mounted at one end thereof communicating with the first return path 410 and detachably mounted at the other end communicating with the check valve 430. 2, a part of the upper end of the return pipe 420 is bent, and the height of the second return pipe 410 to which one end is fastened is higher than the height of the second connection pipe 440 to which the other end is fastened It is processed because it is different. Of course, if the height of the first water supply passage 410 is equal to the height of the second connection pipe 440, the return pipe 420 also becomes a straight line. Here, the return pipe 420 may be installed to directly communicate with the flow space 240 while excluding the check valve 430, the connection pipe 440, and the second recovery passage 450.

4, the one end of the check valve 430 is detachably connected to the other end of the return pipe 420, and the other end of the check valve 430 is connected to one end of the connecting pipe 440, Respectively. As shown in FIG. 4, the check valve 430 is kept closed by the elastic force of the spring, and is opened when the flow pressure of the oil leaked through the return pipe 420 overcomes the elastic force of the spring. This check valve 430 is conventional and a more detailed description will be given when necessary. Also, the return pipe 420 may be connected to the connection pipe 440 in a state where the check valve 430 is omitted.

The connection pipe 440 is a pipe connecting the check valve 430 and the second recovery passage 450. The connection pipe 440 is detachably connected to the other end of the check valve 430 at one end thereof, And is detachably coupled with one end of the second water passage 450. The connection pipe 440 may be an elbow pipe for connecting the check valve 430 disposed in a substantially horizontal direction and the second recovery path 450 disposed in a substantially vertical direction.

The second recovery passage 450 is a channel formed in the casing cover 230 to connect the connection pipe 440 and the flow space 240. The second recovery passage 450 is connected to the other end of the connection pipe 440, And the other end is processed so as to communicate with the flow space 240.

<Operation>

When the motor 110 is operated and the impeller 220 is rotated by the first rotation shaft 120, the cooling oil from the cooling oil supply unit 200 flows into the cooling oil supply unit 200 through the inlet 231, 131).

At this time, if a part of the cooling oil leaks from the mechanical seal 300 and flows to the motor 110 along the rotation shaft 120, the return oil is collected in the first recovery passage 410, To the check valve 430. When the check valve 430 is opened by the flow pressure of the oil leakage, the oil in the return pipe 420 passes through the check valve 430 and flows through the connection pipe 440 and the second recovery passage 450 to the casing cover 230). &Lt; / RTI &gt; Thus, the oil is recovered to the vicinity of the inlet 231 and then flows to the outlet 131 again by the impeller 220.

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims, rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalents of the claims are to be construed as being included within the scope of the present invention do.

100: power unit 110: motor
120: rotating shaft 121: first part
122: second portion 130: pump body
131: discharge port 140: bearing
150: Oil seal 200: Cooling oil supply part
210: casing 220: impeller
230: casing cover 231: inlet
240: flow space 300: mechanical seal
400: cooling oil recovery part 410: first recovery water passage
420: return pipe 430: check valve
440: connector 450: second return line.

Claims (7)

A cooling oil supply unit 200 having an impeller 220 embedded in a casing 210; A power unit 100 having a rotating shaft 120 for rotating the impeller and a motor 110; A pump body (130) installed between the motor and a cooling oil supply unit and through which a rotating shaft passes; and a mechanical seal (300) installed to surround the rotating shaft while being installed in the pump body,
A first recovery passage (410) formed in the pump body to collect cooling oil leaking from the mechanical seal and flowing along the rotation shaft to the motor side;
A return pipe 420 installed to connect the first recovery channel and the cooling oil supply unit to recover the leaking oil collected in the first recovery channel to the cooling oil supply unit;
A check valve (430) installed between the return pipe and the flow space (240) provided in the casing cover (230) and opened by the flow pressure of the oil leaked from the return pipe;
A connection pipe (440) communicating with the check valve; And
And a second recovery passage (450) which is formed in the casing cover so that one end thereof is coupled to the connection pipe and the other end thereof is communicated with the flow space. Including,
One end of the first recovery passage 410 is connected to a space formed between the rotation shaft and the pump body 130 by a difference in outer diameter between the first portion 121 and the second portion 122 constituting the rotation axis, And the return oil is supplied to the space. delete delete The method according to claim 1,
One end of the first recovery passage 410 is positioned between a seal member provided in a space between the outer surface of the second portion 122 of the rotating shaft and the inner surface of the pump body 130 and the oil seal, And the oil seal (150) is installed on the side of the mechanical seal (300) in the second portion. delete delete delete
KR1020150094320A 2015-07-01 2015-07-01 Coolant supplying device having return pipe for returing leaked oil KR101821856B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150094320A KR101821856B1 (en) 2015-07-01 2015-07-01 Coolant supplying device having return pipe for returing leaked oil

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Application Number Priority Date Filing Date Title
KR1020150094320A KR101821856B1 (en) 2015-07-01 2015-07-01 Coolant supplying device having return pipe for returing leaked oil

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KR101821856B1 true KR101821856B1 (en) 2018-01-24

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CN110080883B (en) * 2019-06-04 2021-04-06 中国航空工业集团公司北京长城计量测试技术研究所 A online extrinsic cycle auxiliary device of small leakage lubricating oil for sealing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012172654A (en) * 2011-02-24 2012-09-10 Torishima Pump Mfg Co Ltd Circulation pump

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Publication number Priority date Publication date Assignee Title
KR101355347B1 (en) 2012-04-17 2014-01-24 현대위아 주식회사 Supply apparatus of coolant for machine tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012172654A (en) * 2011-02-24 2012-09-10 Torishima Pump Mfg Co Ltd Circulation pump

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