KR101795853B1 - Sealing device and machine tool equipped with the same - Google Patents

Sealing device and machine tool equipped with the same Download PDF

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Publication number
KR101795853B1
KR101795853B1 KR1020150094092A KR20150094092A KR101795853B1 KR 101795853 B1 KR101795853 B1 KR 101795853B1 KR 1020150094092 A KR1020150094092 A KR 1020150094092A KR 20150094092 A KR20150094092 A KR 20150094092A KR 101795853 B1 KR101795853 B1 KR 101795853B1
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KR
South Korea
Prior art keywords
rotating body
sealing member
air
discharge
sealing
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Application number
KR1020150094092A
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Korean (ko)
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KR20170004147A (en
Inventor
김태식
Original Assignee
현대위아 주식회사
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Priority to KR1020150094092A priority Critical patent/KR101795853B1/en
Publication of KR20170004147A publication Critical patent/KR20170004147A/en
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Publication of KR101795853B1 publication Critical patent/KR101795853B1/en

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    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • 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
    • B23Q11/08—Protective coverings for parts of machine tools; Splash guards
    • 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
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

The present invention relates to a sealing device and a machine tool having the sealing device, and more particularly to a sealing device which is in close contact with any one of a non-rotating body and a rotating body that rotates with respect to the non-rotating body, A sealing member; Wherein when the rotational speed of the rotating body is less than a predetermined value, no air is supplied to the sealing member side, and when the rotational speed of the rotating body is equal to or greater than the predetermined value, ; And a labyrinth seal formed on the opposite side of the sealing member with respect to the air supply device. Thus, it is possible to prevent foreign matter from flowing through the non-rotating body and between the rotating body and to suppress the occurrence of friction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sealing device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sealing apparatus and a machine tool having the sealing apparatus, and more particularly, to a sealing apparatus and a machine tool having the sealing apparatus.

In general, a machine that is used for machining a metal or non-metal material to a shape and a dimension by using a suitable tool, or for more precise machining of a workpiece by various cutting or non-cutting methods is referred to as a machine tool .

The machine tool is classified into a cutting machine tool in which chips are generated during machining and a non-cutting machine tool (metal working machine) in which chips are not generated during machining. The cutting machine tool includes a lathe, a milling machine, a machining center, a drilling machine, a boring machine, a grinding machine, a gear processing machine, and a special processing machine. The non-cutting machine tool includes a mechanical press, a hydraulic press, It has an early stage and a drawing machine.

The cutting machine tool (hereinafter referred to as " machine tool ") includes a fixed non-rotating body and a rotating body that rotates with respect to the non-rotating body, and a sealing device for preventing foreign matter from flowing between the non- Respectively.

For example, the machine tool includes a table device for placing a workpiece, and the table device is provided with the sealing device.

1 is a sectional view showing a conventional sealing apparatus and a machine tool having the same.

1, a conventional machine tool includes a table device on which a workpiece (not shown) is placed and a tooling device (not shown) for machining a workpiece (not shown) placed on the table device.

The table device includes a frame 1, a driving motor 2 provided inside the frame 1 to generate a rotating force, a rotating shaft 3 coupled to the rotator 22 of the driving motor 2, A table 4 on which a workpiece (not shown) is placed and which is rotatably coupled to the rotary shaft 3 and a foreign substance (e.g., coolant, chips, etc.) (not shown) And a sealing device (5) for preventing inflow through the space (4).

The sealing device (5) is formed of the table (4) and a sealing member which is in close contact with the frame (1).

The sealing device 5 is slidably formed with respect to the frame 1 while being rotated together with the table 4 or slidably with respect to the table 4 while being fixed to the frame 1.

Here, the sealing device 5 is provided between the table 4 and the frame 1, but may be provided between other rotating bodies and non-rotating bodies.

However, in such a conventional machine tool, friction occurs at one side of the sealing device 5 when the rotating body is rotated. Thereby, the sealing effect is lowered due to friction loss, heat generation, wear of the sealing device, and wear of the sealing device. Further, due to the lowering of the sealing effect, foreign matter may flow between the non-rotating body and the rotating body, resulting in breakage of the machine tool. Such a problem may be insignificant when the rotating speed of the rotating body is low, but it may be equivalent when the rotating speed of the rotating body is high.

Korean Patent Publication No. 10-2013-0084148

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a sealing device which is interposed between a non-rotating body and a rotating body so as to prevent foreign matter from flowing between the rotating body and the rotating body, It is for that purpose.

In order to achieve the above-mentioned object, the present invention provides a nonaqueous electrolyte secondary battery comprising: a noncircuit member which is in close contact with any one of a noncircuit member and a rotating member that rotates relative to the noncircumferential member, absence; Wherein when the rotational speed of the rotating body is less than a predetermined value, no air is supplied to the sealing member side, and when the rotational speed of the rotating body is equal to or greater than the predetermined value, ; And a labyrinth seal formed on the opposite side of the sealing member with respect to the air supply device.

The air supply device includes: an air supplier for sucking air; An air pocket for storing air introduced from the air supplier; And a discharge passage for discharging the air stored in the air pocket, wherein the sealing member extends in an annular shape along the rotating direction of the rotating body, and the discharge port of the discharge passage is formed in an annular shape along the extending direction of the sealing member As shown in FIG.

The air pocket and the discharge passage may be formed in an annular shape along the rotational direction of the rotating body.

The inlet port of the discharge channel may be formed to be narrower than the air pocket and the discharge port of the discharge channel may be formed to be narrower than the inlet port of the discharge channel.

Wherein the discharge passage includes: a first discharge passage communicating with the air pocket; And a second discharge flow passage for communicating the first discharge flow passage and the discharge opening, wherein the second discharge flow passage is formed to be narrower than the first discharge flow passage.

Wherein the sealing member comprises: a support portion which is in close contact with any one of the non-rotating body and the rotating body; And an extension part extending from the support part and contacting and spacing apart from the other one of the non-rotating body and the rotating body, wherein a discharge port of the discharge path is connected to the non- And may be formed to face the end of the part.

The sealing member may be formed of an elastic material, and the thickness of the extending portion may be formed to be thinner than the thickness of the supporting portion.

The labyrinth seal room may be formed such that the rotating body is spaced apart from the non-rotating body by a predetermined interval.

A first portion communicating with the discharge space of the air supply device and formed with a predetermined width, wherein the gap between the rotating body and the non-rotating body is a width of the labyrinth seal chamber; A second portion communicating with the first portion and having a greater width than the first portion; And a third portion communicating with the second portion and having a width narrower than the second portion.

On the other hand, the present invention is characterized by comprising: a frame; A drive motor provided inside the frame and generating a rotational force; A rotating shaft coupled to a rotor of the driving motor; And a table disposed on an upper portion of the frame so as to be rotatably coupled to the rotating shaft, wherein the frame is the non-rotating body, the table is the rotating body, and the frame is disposed between the frame and the table Wherein the sealing device is interposed.

The sealing device and the machine tool having the sealing device according to the present invention are characterized by including a sealing member interposed between the non-rotating body and the rotating body, and supplying air to the sealing member side such that the sealing member contacts and separates from the non- And a labyrinth seal formed on the opposite side of the sealing member with respect to the air supply device, thereby preventing foreign matter from flowing between the non-circulation and the rotating body The occurrence of friction can be suppressed. Thereby, deterioration of the sealing effect due to friction loss, heat generation, wear of the sealing device, and wear of the sealing device can be suppressed. In addition, breakage of the machine tool due to foreign matter inflow and friction can be prevented.

1 is a cross-sectional view of a conventional sealing apparatus and a machine tool having the sealing apparatus,
2 is a cross-sectional view illustrating a sealing apparatus and a machine tool having the sealing apparatus according to an embodiment of the present invention,
Fig. 3 is an enlarged cross-sectional view of the sealing device of Fig. 2,
Fig. 4 is an enlarged sectional view of the sealing member and the air supply device in the sealing device of Fig. 3,
Fig. 5 is an enlarged cross-sectional view of a first portion and a second portion of the labyrinth seal in the sealing device of Fig. 3,
FIG. 6 is an enlarged cross-sectional view of a third portion of the labyrinth seal in the sealing device of FIG. 3;
7 is a sectional view taken along the line II in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a sealing apparatus and a machine tool having the same according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view illustrating a sealing apparatus and a machine tool having the same according to an embodiment of the present invention, FIG. 3 is an enlarged cross-sectional view of the sealing apparatus of FIG. 2, Fig. 5 is an enlarged cross-sectional view of a first portion and a second portion of the labyrinth seal in the sealing device of Fig. 3, and Fig. 6 is a cross- FIG. 7 is an enlarged cross-sectional view of the third portion of the labyrinth seal in the sealing device, and FIG. 7 is a sectional view taken along the line II in FIG.

As shown in these drawings, a machine tool according to an embodiment of the present invention includes a table device on which a workpiece (not shown) is placed and a tooling device (not shown) for machining a workpiece (not shown) ).

The table 4 apparatus includes a frame 1, a driving motor 2 provided inside the frame 1 to generate a rotational force, a rotary shaft (not shown) coupled to the rotor 22 of the driving motor 2 A table 4 and a foreign matter (not shown) disposed on the upper part of the frame 1 so as to be rotatably coupled to the rotary shaft 3 and to hold a work (not shown) And a sealing device (5) interposed between the tables (4).

The frame 1 includes a main housing 11 having a substantially cylindrical inner space, a first annular member 12 coupled to the upper side of the main housing 11 opposed to the table 4, And a lower cover 14 fastened to the lower side of the main housing 11 opposite to the table 4 with respect to the main housing 11.

The main housing 11 includes a sealing member facing portion 111 formed in an annular shape and a first annular member positioned inside the radial direction of the sealing member facing portion 111 and fastened to the first annular member 12, A mounting portion 112 and a second annular member mounting portion 113 located radially inward of the first annular member mounting portion 112 and to which the second annular member 13 is fastened.

The sealing member facing portion 111 has a sealing member facing upper surface 1111 which is in contact with and spaced apart from a sealing member 51 to be described later and a sealing member opposing inner circumferential surface 1111 which is bent from the inner circumferential portion of the sealing member facing portion upper surface 1111, (1112) and a sealing member facing side stepped surface (1113) formed to be engraved from the sealing member facing side inner peripheral surface (1112). Here, the sealing member facing upper surface 1111, the sealing member facing inner surface 1112, and the sealing member facing surface step surface 1113 may be annular along the rotational direction of the table 4. The inner circumferential surface 1112 of the sealing member opposing portion 1112 is formed at a predetermined distance from the rotation center of the table 4 at the upper portion of the sealing member opposing portion 111 so as to form a first discharge passage 5232, And the sealing member facing portion stepped surface 1113 is formed at a lower portion of the sealing member facing portion 111 so as to form an air pocket 522 to be described later with reference to the rotation center of the table 4, And may be formed to have a larger diameter than the inner peripheral surface 1112 of the opposite portion.

The main housing 11 may have a through hole 1114 for communicating the outside of the main housing 11 with an air pocket 522 to be described later.

The plurality of through holes 1114 may be arranged at equal intervals along the rotation direction of the table 4. [

An air supplier 521, which will be described later, may be mounted at the entrance of the through-hole 1114.

The first annular member 12 includes a first fastening portion 121 fastened to the main housing 11 and a second fastening portion 121 extending from an upper peripheral portion of the first fastening portion 121 in a radial direction of the first fastening portion 121 And a first step portion 123 protruding from the upper inner peripheral portion of the first fastening portion 121 toward the table 4.

The first fastening part 121 includes a first fastening part bottom surface 1211 closely contacting the first annular member mounting part 112, a first fastening part upper surface 1212 facing the table 4, A first fastening portion outer peripheral surface 1213 opposed to the member opposing inner peripheral surface 1112 and a first fastening portion step surface 1214 engraved from the outer peripheral surface 1213 of the first fastening portion 1213 and a second fastening portion stepped surface 1214 engaging with the second annular member 1313 The first fastening portion inner circumferential surface 1215 facing the first fastening portion. Here, the first fastening portion bottom surface 1211, the first fastening portion top surface 1212, the first fastening portion outer circumferential surface 1213, the first fastening portion stepped surface 1214, and the first fastening portion inner circumferential surface 1215 may be formed in an annular shape along the rotation direction of the table 4. The outer circumferential surface 1213 of the first fastening portion 1213 is formed at a predetermined diameter with respect to the center of rotation of the table 4 at the upper portion of the first fastening portion 121, 1214 may be formed to have a smaller diameter than the outer circumferential surface 1213 of the first fastening portion with respect to the center of rotation of the table 4 at the lower portion of the first fastening portion 121.

The nozzle unit 122 may include a bottom surface 1221 of the nozzle unit facing the sealing member facing portion 1111 and a top surface 1222 of the nozzle unit facing the bottom surface 1221 of the nozzle unit. Here, the bottom surface 1221 of the nozzle part and the top surface 1222 of the nozzle part may be annular along the rotation direction of the table 4.

The first step jaw 123 includes a first step jaw outer surface 1231 bent from the first jaw upper surface 1212 and a first step jaw upper surface 1232 bent from the first step jaw outer surface 1231. [ And a first stepped inner circumferential surface 1233 bent from the first stepped upper surface 1232. Here, the first step outer peripheral surface 1231, the first step upper surface 1232, and the first step inner peripheral surface 1233 may be annular along the rotation direction of the table 4. The inner circumferential surface 1233 of the first step and the inner circumferential surface 1215 of the first engagement portion may be formed to have the same diameter as the center of rotation of the table 4.

The first annular member 12 having such a configuration can be installed so that the first fastening portion stepped surface 1214 is spaced apart from the sealing member facing portion stepped surface 1113 so as to form an air pocket 522 to be described later .

The first annular member 12 may be provided so that the outer circumferential surface 1213 of the first engagement portion is spaced apart from the inner circumferential surface 1112 of the sealing member opposing portion 1112 so as to form a first discharge passage 5232 to be described later.

The first annular member 12 may be installed such that the bottom surface 1221 of the nozzle part is spaced apart from the upper surface 1111 of the sealing member facing part so as to form a second discharge passage 5233 to be described later.

The first annular member 12 is spaced apart from the sealing member 51 to be described later so that the upper surface 1222 of the nozzle portion is formed so as to form a first portion 531 of the labyrinth seal 53, 1 fastening portion upper surface 1212, the outer surface of the first step outer surface 1231 and the upper surface of the first step upper surface 1232 may be spaced apart from the table 4.

The first annular member 12 has a first inner circumferential surface 1233 and an inner circumferential surface 1215 of the first engaging portion so as to form a second portion 532 of the labyrinth seal 53, Can be installed so as to be spaced apart from the table (4). The distance between the inner circumferential surface 1233 of the first step and the table 4 may be larger than the distance between the inner circumferential surfaces 1215 of the first fastening part 12 and the table 4.

The second annular member 13 includes a second fastening portion 131 fastened to the main housing 11 and a second fastening portion 131 projecting from the upper inner peripheral portion of the second fastening portion 131 toward the table 4, And may include a step portion 132.

The second fastening portion 131 includes a second fastening portion bottom surface 1311 which is in close contact with the second annular member mounting portion 113, a second fastening portion top surface 1312 which faces the table 4, A second fastening part outer circumferential surface 1313 opposed to the first fastening part inner circumferential surface 1215 and a second fastening part inner circumferential surface 1314 opposed to the rotation shaft 3. [ Here, the bottom surface 1311 of the second fastening portion, the top surface 1312 of the second fastening portion 1313, the outer circumferential surface 1313 of the second fastening portion 1313, and the inner circumferential surface 1314 of the second fastening portion 1314, As shown in FIG.

The second step portion 132 includes a second stepped portion outer peripheral surface 1321 bent from the second coupling portion upper surface 1312 and a second stepped upper surface portion 1322 bent from the second step outer peripheral surface 1321. [ And a second stepped inner peripheral surface 1323 bent from the second stepped upper surface 1322. Here, the second step outer peripheral surface 1321, the second step upper surface 1322, and the second step inner peripheral surface 1323 may be annular along the rotation direction of the table 4. The inner circumferential surface 1323 of the second step and the inner circumferential surface 1314 of the second engagement portion may be formed to have the same diameter as the center of rotation of the table 4.

The second annular member 13 having such a constitution is arranged on the upper surface 1312 of the second fastening portion 1312, the outer circumferential surface 1321 of the second step portion 1321, and the second fastening portion 1321 so as to form a third portion 533 of the labyrinth seal 53, The second stepped upper surface 1322 and the second stepped inner peripheral surface 1323 may be spaced apart from the table 4. [

The driving motor 2 includes a stator 21 fixed to an inner space of the main housing 11 and a rotor 22 disposed inside the stator 21 and rotated by interaction with the stator 21 ).

The rotary shaft 3 may be coupled to the rotor 22 at one side and to the table 4 at the other side.

The table 4 may be formed of a circular plate concentric with the center of rotation of the rotary shaft 3.

The bottom surface of the table 4 may be formed with a sealing groove 41 into which a sealing member 51 to be described later is inserted. The sealing groove 41 may be formed in an annular shape along the rotational direction of the table 4 with respect to the center of rotation of the table 4.

A curved surface 42 for forming a labyrinth chamber 53 to be described later together with the first annular member 12 and the second annular member 13 may be formed on the bottom surface of the table 4 .

The curved surface 42 may be formed radially inward of the sealing groove 41.

The curved surface 42 has a first labyrinth surface 421, a first labyrinth surface 421, and a second labyrinth surface 422, which are opposed to the first coupling portion upper surface 1212 at a radially inner side of the sealing groove 41, A second labyrinth surface 422 bent from the second labyrinth surface 422 and opposed to the first end jaw top surface 1232 and a second labyrinth surface 422 bent from the second labyrinth surface 422, A fourth labyrinth surface 424 bent from the third labyrinth surface 423 and opposed to the first inner circumferential surface 1233 of the first step and a fourth labyrinth surface 424 bent from the fourth labyrinth surface 424, A fifth labyrinth surface 425 which is bent in a direction away from the center of rotation of the table 4 and a sixth labyrinth surface 425 bent from the fifth labyrinth surface 425 and opposed to the first fastening portion inner circumferential surface 1215, A rinse surface 426, a seventh labyrinth portion 426 bent from the sixth labyrinth surface 426 and opposed to the upper surface 1312 of the second fastening portion, An eighth labyrinth surface 428 that is bent from the seventh labyrinth surface 427 and opposes the second end jaw peripheral surface 1321 and a fourth labyrinth surface 428 that is bent from the eighth labyrinth surface 428, And a ninth labyrinth surface 429 that is opposite to the second stage jaw top surface 1322 and a tenth labyrinth bend that is bent from the ninth labyrinth surface 429 and opposite the second end jaw inner surface 1323, And a surface 4210.

The sealing device 5 includes a sealing member 51 having one side thereof being in close contact with the table 4 and the other side being in contact with and spaced apart from the frame 1 to supply air to the sealing member 51 side, And a labyrinth seal chamber 53 formed on the opposite side of the sealing member 51 with respect to the air supply device 52. [

The sealing member 51 includes a supporting portion 511 inserted into and supported by the sealing groove 41 and an extending portion 512 extending from the supporting portion 511 and contacting and spaced from the sealing member facing upper surface 1111, . ≪ / RTI >

The supporting portion 511 is formed in an annular shape along the rotation direction of the table 4 and inserted into the sealing groove 41 so that the upper surface and the inner circumferential surface of the supporting portion 511 are in close contact with the sealing groove 41 have.

The extension portion 512 may be formed in an annular shape along the rotation direction of the table 4 and an end portion of the extension portion 512 may be formed to be in contact with the upper surface 1111 of the sealing member opposing portion.

When the air is not supplied from the air supply device 52, the end of the extending part 512 contacts the upper surface 1111 of the sealing member facing part 1111, When the air is supplied from the device 52, the end portion of the extending portion 512 is made of an elastic material so as to be spaced apart from the upper surface 1111 of the sealing member facing portion, And the thickness of the extended portion 512 may be formed to be thinner than the thickness of the support portion 511. [

The air supply device 52 includes an air supplier 521 provided at an inlet of the through hole 1114 and sucking air from the outside of the frame 1, An air pocket 522 for discharging air stored in the air pocket 522, and a discharge passage 523 for discharging air stored in the air pocket 522.

The discharge passage 523 is formed between the inlet port 5231 through which the air stored in the air pocket 522 flows and the discharge port 5234 through which air introduced into the inlet port 5231 is discharged, And a second discharge passage 5233 for communicating the first discharge passage 5232 with the discharge opening 5234. The first discharge passage 5232 may be formed of a resin,

Here, the air supply device 52 may be configured such that when the rotational speed of the table 4 is less than a predetermined value, the sealing member 51 is brought into contact with the sealing member opposing portion 111, And when the rotation speed of the table 4 is equal to or greater than a predetermined value, air is supplied to the sealing member 51 side so that the sealing member 51 is spaced apart from the sealing member facing portion 111. [ And the sealing member 51 may be formed such that a portion where the sealing member 51 is in contact with the sealing member facing portion 111 when air is supplied is not generated.

More specifically, unlike the present embodiment, when the discharge passage is formed by a plurality of holes and a plurality of the discharge ports are formed and a plurality of discharge ports are arranged along the rotational direction of the table, A portion remote from the discharge port of the sealing member can not contact the sealing member facing portion due to insufficient force from the air. In this case, when the rotation speed of the table is equal to or greater than a predetermined value, a part of the sealing member is in contact with the sealing member facing portion, and friction may be generated.

In consideration of this, in the case of this embodiment, the discharge port 5234 may be formed in an annular shape along the rotating direction of the table 4. Accordingly, the distance between the entire portion of the sealing member 51 (more precisely, the end of the extending portion 512) and the discharge port 5234 becomes equal, and air is supplied from the air supply device 52 The entire portion of the sealing member 51 can be sufficiently spaced apart from the sealing member facing portion 111 by the air.

The air pocket 522 and the discharge passage 523 may be formed in an annular shape so that the kinetic energy of the air is equal to the entire area of the discharge port 5234. That is, the air pocket 522 is formed in an annular shape along the rotation direction of the table 4 by the sealing member facing portion stepped surface 1113 and the first fastening portion stepped surface 1214, The discharge passage 5232 is formed in an annular shape along the rotating direction of the table 4 by the sealing member opposing inner peripheral surface 1112 and the first coupling outer peripheral surface 1213 and the second discharge passage 5233, May be bent from the first discharge passage (5232) by the upper surface (1111) of the sealing member opposing portion and the bottom surface (1221) of the nozzle portion and formed in an annular shape along the rotational direction of the table (4).

The discharge passage 523 converts the pressure energy of the air pocket 522 into kinetic energy of the air discharged from the discharge port 5234. The kinetic energy of the air discharged from the discharge port 5234 is maximized So that the sealing member 51 can be more easily separated from the sealing member facing portion 111. In addition, That is, when the gap between the sealing member facing portion 111 and the first annular member 12 is the width of the discharge passage 523, the width of the discharge passage 523 at the inlet 5231 is larger than the width And may be formed to be narrower than the width of the air pocket 522. The width at the discharge port 5234 may be narrower than the width at the inlet 5231. The width of the discharge passage 523 may be narrower from the inlet 5231 to the outlet 5234. In this embodiment, the width of the first discharge passage 5232 is formed at the same level as the width of the inlet 5231, and the width of the second discharge passage 5233 is equal to the width of the discharge port 5234 ≪ / RTI > That is, the second discharge passage 5233 may be formed to be narrower than the first discharge passage 5232.

The air discharged from the discharge port 5234 directly presses the extended portion 512 of the sealing member 51 so that the sealing member 51 is in contact with the sealing member facing portion 111 The discharge port 5234 may be formed so as to be opposed to the end portion of the extension portion 512. [

The labyrinth seal chamber 53 is formed in such a manner that air discharged from the air supply device 52 leaks to the rotating shaft 3 side (the opposite side of the sealing member 51 with respect to the air supply device 52) And prevents foreign matter (not shown) flowing through the sealing member 51 from flowing into the rotary shaft 3, wherein the table 4 is provided on the frame 1 ), And can be formed by bending a plurality of times.

The labyrinth chamber 53 has a first portion 531 communicating with the discharge space of the air supply device 52 and formed at a predetermined width, a second portion 531 communicating with the first portion 531, And a third portion 533 communicating with the second portion 532 and having a width narrower than that of the second portion 532. The second portion 532 may have a width larger than the first portion 531 and the third portion 533.

The first portion 531 of the labyrinth seal 53 is connected to the first to third labyrinth surfaces 421, 422 and 423, the upper surface of the first fastening portion 1212, the outer surface of the first step jaw portion 1231 And the first step jaw upper surface 1232.

The second portion 532 of the labyrinth seal chamber 53 may be formed by the third to fifth labyrinth surfaces 423, 424, and 425 and the outer circumferential surface 1231 of the first step.

The third portion 533 of the labyrinth seal 53 is connected to the sixth to tenth labyrinth surfaces 426, 427, 428, 429, 4210, the upper surface of the second fastening portion 1312, The outer peripheral surface 1321 of the jaw portion, the upper surface 1322 of the second step, and the outer surface 1321 of the second step portion.

Here, the width of the first portion 531 and the width of the third portion 533 are formed at the same level, and the width of the second portion 532 is equal to the width of the first portion 531 and the third portion 533. [ May be formed to be wider than the width of the protrusion 533.

Hereinafter, the effects of the sealing device 5 and the machine tool provided according to the present embodiment will be described.

That is, in the machine tool according to the present embodiment, a workpiece (not shown) placed in the table apparatus can be machined by the tooling apparatus (not shown).

At this time, the workpiece (not shown) can be rotated by the table device. That is, when power is applied to the driving motor 2, the rotor 22 can be rotated with respect to the stator 21 by a magnetic force. The table 4 receives the rotational force of the rotor 22 through the rotary shaft 3 and rotates a workpiece (not shown) placed on the table 4.

Here, the sealing device 5 can prevent foreign matter (not shown) from flowing into the rotary shaft 3 side through the space between the table 4 and the frame 1, while suppressing the occurrence of friction.

More specifically, the sealing device 5 may not discharge air when the rotational speed of the table 4 is less than a predetermined value.

The supporting member 511 is brought into close contact with the sealing groove 41 and the extended portion 512 is brought into contact with the upper surface 1111 of the sealing member opposing portion so that foreign substances Can be prevented.

Here, the sealing device 5 is configured such that, when the rotational speed of the table 4 is less than a predetermined value, the sealing member 51 is brought into contact with the sealing member opposing portion 111, The sealing effect can be increased.

On the other hand, when the rotation speed of the table 4 is equal to or larger than a predetermined value, the air supply device 52 can discharge air toward the sealing member 51 side.

The supporting member 511 is in close contact with the sealing groove 41 and the extended portion 512 is spaced apart from the upper surface 1111 of the sealing member facing portion to prevent the occurrence of friction. can do.

At this time, the air supply device 52 is formed such that the discharge port 5234 is formed in a continuous annular shape along the rotation direction of the table 4, Can be applied. As a result, the extended portion 512 of the sealing member 51 is separated from the sealing member facing portion 111 over the entire area, so that no local friction may occur.

In addition, the air supply device is configured such that the air pocket 522 and the discharge passage 523 are formed in an annular shape along the rotation direction of the table 4, so that the kinetic energy of air at the entire portion of the discharge port 5234 Can be equal. Thus, the entire portion of the extending portion 512 of the sealing member 51 can be more easily separated from the sealing member facing portion 111.

In addition, the air supply device can maximize the kinetic energy of the air discharged from the discharge port 5234 by forming the discharge passage 523 in the shape of a nozzle. Thus, the extending portion 512 of the sealing member 51 can be more easily separated from the sealing member facing portion 111.

The air supply device may be configured such that the discharge port 5234 is formed opposite to the end of the extended portion 512 so that air discharged from the discharge port 5234 flows into the extended portion 512 of the sealing member 51, So that the sealing member 51 can be more easily separated from the sealing member facing portion 111.

Here, the sealing device 5 may be configured such that when the rotational speed of the table 4 is equal to or greater than a predetermined value, the sealing member 51 is spaced apart from the sealing member facing portion 111, It is possible to prevent the occurrence of friction even if the reduction in the sealing effect is suppressed. Instead, foreign matter (not shown) introduced into the labyrinth seal chamber 53 through the sealing member 51 may be prevented from flowing into the rotary shaft 3. At this time, the labyrinth chamber 53 is formed with a predetermined width and includes the first portion 531 and the third portion 533 having a plurality of bending portions, thereby preventing foreign matter (not shown) from being introduced And the second portion 532 having a greater width than the first portion 531 and the third portion 533 is provided between the first portion 531 and the third portion 533 (Not shown) passing through the first portion 531 is collected, thereby effectively preventing the foreign matter (not shown) from being introduced. With such a configuration, the sealing device 5 can prevent foreign substances (not shown) from flowing through the space between the frame 1 and the table 4 when the rotational speed of the table 4 is equal to or greater than a predetermined value And the occurrence of friction can be suppressed. As a result, friction loss, heat generation, wear of the sealing device 5, and deterioration of the sealing effect due to wear of the sealing device 5 can be suppressed. In addition, breakage of the machine tool due to foreign matter (not shown) and friction can be prevented.

In addition, the labyrinth seal chamber 53 can prevent the air discharged from the air supply device 52 from leaking to the rotary shaft 3 side. Accordingly, the kinetic energy of air discharged from the air supply device 52 is used to completely separate the sealing member 51 from the sealing member facing portion 111, and the sealing member 51 is used to separate the sealing member 51 from the sealing member 51. [ It can be easily separated from the opposing portion 111.

Meanwhile, in the present embodiment, the sealing device 5 is provided between the table 4 and the frame 1, but may be provided between the other rotating body of the machine tool and the other rotating body between the non- have. For example, between a main shaft (not shown) of the tooling device (not shown) and a housing (not shown) facing the main shaft (not shown).

1: Frame 2: Drive motor
3: rotating shaft 4: table
5: sealing device 11: main housing
12: first annular member 13: second annular member
41: sealing groove 51: sealing member
52: air supply device 53: labyrinth seal
111: sealing member facing portion 121: first fastening portion
122: nozzle unit 123: first stage jaw
131: second fastening part 132: second stage jaw
511: Support part 512: Extension part
521: Air supplier 522: Air pocket
523: Discharge channel 531: First portion of the labyrinth seal
532: second portion of the labyrinth seal 533: third portion of the labyrinth seal
1114: Through hole 5231: Inlet port
5232: first discharge flow path 5233: second discharge flow path
5234: Outlet

Claims (10)

A sealing member that is in close contact with any one of the non-rotating body and the rotating body that rotates with respect to the non-rotating body, and contacts and separates the other of the non-rotating body and the rotating body;
Wherein when the rotation speed of the rotating body is less than a predetermined value, no air is supplied to the sealing member side, and when air is supplied to the sealing member side when the rotation speed of the rotating body is equal to or higher than the predetermined value, ; And
And a labyrinth seal formed on an opposite side of the sealing member with respect to the air supply device,
Wherein the sealing member comprises:
A supporting part which is in close contact with any one of the non-rotating body and the rotating body; And
And an extension extending from the support and contacting and spacing apart from the other of the non-rotating body and the rotating body,
Wherein a discharge port of the discharge passage is formed opposite to the non-circulating body and the end of the extending portion which is capable of contacting with the other one of the rotating body. The method according to claim 1,
The air supply device includes:
An air supplier for sucking in air;
An air pocket for storing air introduced from the air supplier; And
And a discharge passage for discharging the air stored in the air pocket,
Wherein the sealing member extends in an annular shape along the rotating direction of the rotating body,
Wherein a discharge port of the discharge passage is formed in an annular shape along an extending direction of the sealing member. 3. The method of claim 2,
Wherein the air pocket and the discharge passage are formed in an annular shape along the rotating direction of the rotating body. 3. The method of claim 2,
The inlet port of the discharge passage is formed to be narrower in width than the air pocket,
Wherein a discharge port of said discharge passage is formed to be narrower in width than an inlet port of said discharge passage. 3. The method of claim 2,
The discharge passage
A first discharge passage communicating with the air pocket; And
And a second discharge flow passage for communicating the first discharge flow passage and the discharge opening,
And the second discharge flow path is formed to be narrower in width than the first discharge flow path. delete The method according to claim 1,
Wherein the sealing member is formed of an elastic material, and the thickness of the extending portion is formed thinner than the thickness of the supporting portion. The method according to claim 1,
Wherein the labyrinth seal chamber is formed such that the rotating body is spaced apart from the non-rotating body by a predetermined interval. 9. The method of claim 8,
And a distance between the rotating body and the non-rotating body is a width of the labyrinth seal,
In the labyrinth seal,
A first portion communicating with the discharge space of the air supply device and formed with a predetermined width;
A second portion communicating with the first portion and having a greater width than the first portion; And
And a third portion communicating with the second portion and having a width narrower than the second portion. frame;
A drive motor provided inside the frame and generating a rotational force;
A rotating shaft coupled to a rotor of the driving motor; And
And a table coupled to the rotating shaft for rotational movement and disposed above the frame so that the workpiece is placed on the table,
Wherein said frame is the entire non-member of any one of claims 1 to 5, 7 to 9,
Wherein the table is the rotating body of any one of claims 1 to 5 and 7 to 9,
Wherein a sealing device according to any one of claims 1 to 5 and 7 to 9 is interposed between the frame and the table.
KR1020150094092A 2015-07-01 2015-07-01 Sealing device and machine tool equipped with the same KR101795853B1 (en)

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Cited By (1)

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KR102094147B1 (en) * 2018-12-14 2020-03-27 (주)뉴텍 Shot blast turn table for marine equipment

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CN110378069B (en) * 2019-08-01 2020-07-03 南京坤拓土木工程科技有限公司 Method for predicting accumulated mass loss rate of cutter of tunneling machine

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JP2013113358A (en) * 2011-11-28 2013-06-10 Jtekt Corp Variable throttle type hydrostatic bearing

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KR101345946B1 (en) 2012-01-16 2013-12-31 현대위아 주식회사 Clamping device for table of machining center

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Publication number Priority date Publication date Assignee Title
JP2013113358A (en) * 2011-11-28 2013-06-10 Jtekt Corp Variable throttle type hydrostatic bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102094147B1 (en) * 2018-12-14 2020-03-27 (주)뉴텍 Shot blast turn table for marine equipment

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