CN103827565B - Swivel joint - Google Patents
Swivel joint Download PDFInfo
- Publication number
- CN103827565B CN103827565B CN201280047505.2A CN201280047505A CN103827565B CN 103827565 B CN103827565 B CN 103827565B CN 201280047505 A CN201280047505 A CN 201280047505A CN 103827565 B CN103827565 B CN 103827565B
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- Prior art keywords
- seal
- hole
- stationary
- swivel joint
- plane space
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Classifications
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
- F16L27/0816—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings having radial sealing
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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
- B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
- B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
- B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
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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
- 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
- B23Q11/1015—Arrangements for cooling or lubricating tools or work by supplying a cutting liquid through the spindle
- B23Q11/103—Rotary joints specially adapted for feeding the cutting liquid to the spindle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Joints Allowing Movement (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
The object of this invention is to provide a kind of swivel joint, this swivel joint has the easy configuration that the heap sum that can effectively prevent from penetrating the foreign matter in the glade plane space between stationary axle and matching hole solidifies the fault caused.Be provided with the axial direction rotating seal of rotational flow channel and be provided with the fixing seals that axial direction fixes flow channel and arrange coaxially, and swivel joint is configured to make the first sealing surfaces of rotating seal and the second sealing surfaces of fixing seals be attached together to form face seal; The glade plane space (g) holding the stationary axle (8a) of floating seat (8) utilizes the clearance sealing component (12) of the matching hole (7a) be arranged in housing element (7) to be sealed, and connected part (15) is communicated with glade plane space (g), and the fixing flow channel (8f) be in axial direction arranged on clearance sealing component (12) upstream side in stationary axle (8a) is installed into containing fluid from glade plane space (g) to the motion of fixing flow channel (8f).
Description
Technical field
The present invention relates to the swivel joint for fluid being supplied to rotary component.
Background technique
Swivel joint is used as the fluid coupling be connected with the fluid passage of the rotary component of fluid supply mechanism by stationary fluid supply tube, is in the axle of the rotary component such as lathe of rotation status when fluid such as freezing mixture is fed to work by fluid supply mechanism.Be connected to the running shaft of rotary component and be connected to the stationary axle of fluid supply conduit while being arranged in rotation coaxially, swivel joint is configured to make both in axial direction facing with each other.The sealing surfaces (it is attached to the end faced by stationary axle and running shaft) of rotating seal is intimate contact with one another, to prevent fluid leaks.Due to this configuration, fluid can be fed to the rotary component being in rotation status continuously through swivel joint from fluid supply conduit.In this configuration of swivel joint, in order to make sealing surfaces close contact, stationary axle side must be made in axial direction to move.For this reason, stationary axle be coupled to slidably be arranged on housing section grade place hole in.O type ring or other clearance seal elements (it is arranged between the inner circumferential in hole and stationary axle) are used to the seepage of anti-fluid from this glade plane space.
The fluid supplied by swivel joint normally freezing mixture etc., this freezing mixture etc. is recycled to lathe and containing frittering bits or other foreign matters.In the process of fluid without interruption, it is inevitable that this foreign matter enters in the glade plane space between stationary axle and hole.If this foreign matter repeatedly enters, foreign matter is by deposition and stick in glade plane space, and hinders the level and smooth slip of stationary axle.As a result, swivel joint will work abnormally and a large amount of seepage or the other problems of fluid will occur.Therefore, in order to address these problems, there is the swivel joint preventing foreign matter from entering the structure of the glade plane space between stationary axle and hole and be suggested (see PLT1 and PLT2).
In the example of the prior art shown in PLT1, lubricating grease is constantly pushed into circular groove, and circular groove is arranged in the inner peripheral surface in hole, to fill glade plane space with lubricating grease and to prevent foreign matter from entering glade plane space.In addition, in the example of the prior art shown in PLT2, flexible membrane is attached to the end of the upstream side of stationary axle, is not flow to part except the port hole of stationary axle to be sealed to fluid.Therefore, prevent foreign matter from entering into glade plane space.
The patent documentation list of quoting
No. 4426538B2nd, PLT 1. Japan Patent
No. 3-61786Ath, PLT 2. Japanese Unexamined Patent Application
Summary of the invention
Technical problem
But in the above-mentioned example of prior art, there is following difficulty in the configuration of the mechanism entered owing to preventing foreign matter.First, in the embodiment of the prior art shown in PLT1, the lubricating grease of filling glade plane space dissolves gradually in a fluid and weakens filling effect, so lubricating grease is difficult to the effect stably keeping preventing foreign matter from entering.In addition, in the example of the prior art shown in PLT2, diaphragm is attached to the end of the side of the upstream of stationary axle part, although so prevent fluid to enter from the upstream side of glade plane space, the fluid leaks that can not be prevented from from rotary seal portion (it starts for not at once still being in close contact state at fluid) enters from the downstream side of glade plane space.For this reason, in each example of prior art, be difficult to effectively to prevent because foreign matter enters the problem of glade plane space between stationary axle part and hole and deposition of foreign material and solidification.
Propose the present invention solve this problem and the object of this invention is to provide a kind of swivel joint, this swivel joint is by simply effectively preventing the problem because foreign matter enters the glade plane space between stationary axle part and hole and piles sum solidification and produce.
The scheme of dealing with problems
Swivel joint of the present invention is a kind of swivel joint for arranging rotary component and fixed component coaxially, rotating channel is in axial direction arranged in described rotary component and described rotary component is attached to running shaft, stationary conduit along described axial direction is arranged in described fixed component and described fixed component is fixed to holding member, and
By described stationary conduit, fluid is fed to the described rotating channel of the described rotary component rotated around its axle center from fluid provider,
Described swivel joint comprises:
There is the rotary seal portion of the first sealing surfaces, wherein said rotary seal portion be arranged on described rotary component place and described rotating channel at described first sealing surfaces opening, described first sealing surfaces is the side end of described rotary component,
There is the fixing seal part of stationary axle part and the second sealing surfaces,
Wherein said stationary conduit is formed in described stationary axle part along described axial direction,
Wherein said stationary axle part is engaged in the hole be arranged in described holding member and keeps predetermined glade plane space simultaneously, to allow described stationary axle part moving along described axial direction, and
Wherein said stationary conduit is at described second sealing surfaces place opening, and described second sealing surfaces is the side end of described fixed component,
Clearance seal part, it seals described glade plane space and allows to move along the described of described axial direction simultaneously,
End face seal part, it is formed through and described fluid is fed to the inside in described hole from described fluid source and promotes the side end of the opposite side of described stationary axle part, make described first sealing surfaces and described second sealing surfaces intimate contact with one another, and
Connected part, it is arranged on described clearance seal part place in the upstream of described glade plane space, wherein said connected part makes described glade plane space be communicated with described stationary conduit, to allow fluid to move to described stationary conduit from described glade plane space.
Favourable effect of the present invention
According to the present invention, provide a kind of swivel joint for arranging rotary seal portion and fixing seal part coaxially, the rotating channel of axial direction is arranged in rotary seal portion, and the stationary conduit of axial direction is arranged in fixing seal part.In swivel joint, the first sealing surfaces of rotary seal portion and the second sealing surfaces of fixing seal part form close contact to form end face seal part.When the stationary axle part of fixing seal part is engaged in the hole being arranged on holding member place, glade plane space is sealed by clearance seal part.Connected part is arranged on the upstream side of the glade plane space of clearance seal part, and the stationary conduit arranged vertically and glade plane space communicate with each other, to allow fluid to move to stationary conduit from glade plane space.Due to ejector effect (its flow velocity by fluid through stationary conduit inside and produce), cause the fluid motion from glade plane space to stationary conduit.By simple configuration can effectively prevent foreign matter from entering problem that glade plane space between stationary axle part and hole and foreign matter pile sum solidification wherein.
Accompanying drawing explanation
Fig. 1 is the sectional view of the swivel joint in one embodiment of the present of invention (the first embodiment).
Fig. 2 is the partial cross section figure of the swivel joint in one embodiment of the present of invention (the first embodiment).
Fig. 3 is the function description view of the swivel joint in one embodiment of the present of invention (the first embodiment).
Fig. 4 is the sectional view of the swivel joint in one embodiment of the present of invention (the second embodiment).
Fig. 5 is the sectional view of the swivel joint in one embodiment of the present of invention (the 3rd embodiment).
Fig. 6 is the sectional view of the swivel joint in one embodiment of the present of invention (the 4th embodiment).
Fig. 7 is the sectional view of the swivel joint in one embodiment of the present of invention (the 5th embodiment).
Fig. 8 is the sectional view of the swivel joint in one embodiment of the present of invention (the 6th embodiment).
Embodiment
Below, with reference to accompanying drawing, embodiments of the invention are described.With reference to figure 1, swivel joint 1 (the first embodiment) overall arrangement will be described.First the overall arrangement of fluid supply mechanism will be described.In FIG, swivel joint 1 is such parts, and it is applied to and the fluid of cooling is fed to the axle of lathe or the fluid supply mechanism of other running shafts.By arranging that rotary component 1a (rotating channel of axial direction is arranged on rotary component 1a place) and fixed component 1b (stationary conduit of axial direction is arranged on fixed component 1b place) configures swivel joint 1 coaxially.
Rotary component 1a is fixed to the port hole 2a of the running shaft be made up of axle 2.By the motor be built in axle, axle 2 is driven in rotation and rotates around its axle center A.Meanwhile, rotary component 1a in axial direction operates into advance and withdrawal by clamping/unclamping cylinder.In addition, fixed component 1b is fixedly fastened to hole 3a by the holding member be made up of housing element 7, and hole 3a is arranged to be communicated with the port hole 3b at housing 3.Insert framework (not shown) place wherein in axle 2, bolt or other securing meanss are used for making housing 3 fastening removably, and fixed component 1b and rotary component 1a arranges coaxially.Port hole 3b is supplied with cooling liquid or tempering air or other fluids by fluid provider (not shown).
Below, the detailed construction of each parts will be described.Rotary component 1a is formed primarily of the revolving part 4 being attached to axle 2.Revolving part 4 utilizes flange portion 4b to be arranged on end in running shaft part 4a side, and the outer diameter of flange portion 4b is greater than running shaft part 4a.In addition, the shape of axial portions is formed as rotating channel 4e and in axial direction arranges.Male screw portion 4d is arranged on the outer surface of running shaft part 4a, and female portion 2b is arranged on the internal surface place of port hole 2a.By male screw portion 4d is threaded onto female portion 2b, revolving part 4 is threadingly attached to axle 2, and helical thread portion is sealed by O type ring 6.Therefore, rotating channel 4e is communicated with the port hole 2a of axle 2.
Annular recess 4c is formed in the side end place on the right side (that side in the face of fixed component 1b) of revolving part 4 in the mode in the perforate face around rotating channel 4e.First seal ring 5 is fixed on recess 4c place.First seal ring 5 is made up of pottery or another hard material, and this material is rich in wear resistance and is formed as annular, and this annular wherein heart part place has open part 5a.The state that first seal ring 5 forms outer surface with the first sealing surfaces 5b (it is finish-machined to smooth surface) is fixed to recess 4c.In this condition, rotating channel 4e is communicated with open part 5a, and at the first sealing surfaces 5b opening.In above-mentioned configuration, revolving part 4 (the first seal ring 5 is fixed on it) is arranged on rotary component 1a place and forms rotary seal portion, and this rotary seal portion has the first sealing surfaces 5b at the side end place of rotating channel 4e opening.
Below, will the structure being attached to the fixed component 1b of housing 3 be described.Fixed component 1b is configured to have the floating seat 8 being attached to housing element 7.At the attachment surface 3c place of housing 3, be set to the attachment apertures 3a opening be communicated with port hole 3b.The cylinder blanket element 7 forming the main body of fixed component 1b is engaged in attachment apertures 3a place.Housing element 7 is bolted to tapped hole (not shown), and this tapped hole is arranged on attachment surface 3c (not shown) place.The housing element 7 coordinated with attachment apertures 3a is sealed by 11 by O type ring.
Floating seat 8 is provided with disc shaped flange portion 8b in side (in FIG, the side towards rotary component 1a), and has stationary axle part 8a at opposite side, and in stationary axle part 8a, stationary conduit 8f is formed as in axial direction extending.In the left side (end face in the face of rotary component 1a) of flange portion 8b, the second seal ring 9 is fixed on the inner side of projection 8c, and projection 8c is set up with the shape that annular is outstanding.Second seal ring 9 is formed as annular by the hard material being similar to the first seal ring 8, this annular has open part 9a at core, and is fixed to flange portion 8b with the state that the second sealing surfaces 9b (being finish-machined to smooth surface) is formed as outer surface side.In this condition, stationary conduit 8f is communicated with open part 9a, so that at the second sealing surfaces 9b place opening.
Stationary axle part 8a is engaged in the 7a of hole to allow the state of in axial direction carrying out moving, and hole 7a is arranged in axial direction through the core of housing element 7.That is, hole 7a and stationary axle part 8a is arranged to the glade plane space of predetermined gap size (see Fig. 2) " g " is fastened between the inner peripheral surface 7b of hole 7a and the outer surface 8d of stationary axle part 8a on size and dimension.Seal groove 7c is formed in the inner peripheral surface 7b of hole 7a.The annular seal element be made up of O type ring 12a and packing ring 12b is engaged in seal groove 7c place.At 7a place, hole, the state be engaged with stationary axle part 8a, O type ring 12a is pulled to outer surface 8d.Therefore, glade plane space " g " is sealed.O type ring 12a and packing ring 12b (they are fitted to and are attached in seal groove 7c) forms clearance seal part 12, and clearance seal part 12 seals glade plane space " g " and allows stationary axle part 8a in axial direction to move simultaneously.
That is, the state that floating seat 8 (the second seal ring 9 is fixed to floating seat 8) has to allow in axial direction to move is coupled to the stationary axle part 8a in the 7a of hole.Hole 7a is arranged on housing element 7 place, and housing element 7 has the stationary conduit that in axial direction formed and is used as holder.This forms fixing seal part, and this fixing seal part has the second sealing surfaces 9b, at the side end opening of the second sealing surfaces place stationary conduit 8f at stationary axle part 8a.In the present embodiment, illustrate that floating seat 8 is attached to the example of housing 3 by the housing element by being used as holder.Floating seat 8 also can directly be attached to housing 3.In this case, to allow the state of in axial direction moving, stationary axle part 8a is engaged in hole, and this hole is arranged in the housing 3 as holder.
Below, the operation of swivel joint 1 will be described.The fluid being supplied to 7a inside, hole is supplied through port hole 3b.This hydrodynamic pressure acts on side end 8e at the opposite side (side relative with the second seal ring 9) of stationary axle part 8a.Therefore, stationary axle part 8a slides into that side of rotary component 1a in the 7a of hole, and the second seal ring 9 is promoted to be against the first seal ring 5 by fluid force F (its value is that the area of contour of side end 8e is multiplied by hydrodynamic pressure).This fluid force F makes the second sealing surfaces 9b and the first sealing surfaces 5b intimate contact with one another.Therefore, end face seal part 10 is formed as the seepage being in the fluid enclosing the state pivoted preventing from being supplied to rotating channel 4e from stationary conduit 8f.
Along the axial direction of this floating seat 8, be threaded onto the bolt 16 in flange portion 8b and slide past bullport 7d from outside around the cylindrical ring 17 of bolt 16 inner, bullport 7d is in axial direction arranged in housing element 7.Therefore, floating seat 8 motion is in axial direction directed, and is prevented from enclosing and pivots.
In the serviceability of swivel joint 1, because the advance of pressure floating seat 8 of fluid that is supplied and the advance/recovery operation of axle 2 cause end face seal part 10 to be separated close to sealing surfaces with sealing surfaces.Namely, when floating seat 8 is regained and the first sealing surfaces 5b and the second sealing surfaces 9b is separated from one another, if this fluid is supplied to port hole 3b, the side end 8e that so fluid force F acts on stationary axle part 8a in the 7a of hole in axial direction promotes side end 8e.Therefore, floating seat 8 advances (direction of arrow " a "), and the first sealing surfaces 5b and the second sealing surfaces 9b adjoins, and forms the end face seal part 10 of close contact.Therefore, fluid is fed to rotating channel 4e with rotation status from stationary conduit 8f.
By the advance (arrow " d " direction) of axle 2 relative to fixed component 1b, floating seat 8 is regained (arrow " b " direction), and flange portion 8b turns back to very close to the position of housing element 7.By making axle 2 regain (direction of arrow " c ") relative to this state, it turns back to the first sealing surfaces 5b and the second sealing surfaces 9b state separated from one another.
Below, with reference to figure 2, explanation is arranged on stationary axle part 8a place and the connected part 15 of connection glade plane space " g " and stationary conduit 8f.Fig. 2 (a) illustrates the sectional view along B-B in Fig. 1, that is, at the sectional view of the stationary axle part 8a of the upstream side of clearance seal part 12.At stationary axle part 8a place, peripheral groove 13 is arranged on the whole circumference place of outer surface 8d.At stationary axle part 8a place, multiple (being four here) through hole 14 (it is connected and fixed passage 8f and peripheral groove 13) is arranged in a radial manner.
As shown in Fig. 2 (b), the glade plane space " g " between the inner peripheral surface 7b of peripheral groove 13 and hole 7a and the outer surface 8d of stationary axle part 8a is communicated with, and glade plane space " g " is communicated with stationary conduit 8f by through hole 14 simultaneously.Therefore, hole 7a is supplied to and the fluid entering glade plane space " g " is allowed to move across peripheral groove 13 and through hole 14 arrives stationary conduit 8f.Therefore, peripheral groove 13 and through hole 14 are arranged on the upstream side place in the glade plane space " g " of clearance seal part 12 and form connected part 15, and connected part 15 is communicated with glade plane space " g " and stationary conduit 8f and allows fluid to move to stationary conduit 8f from glade plane space " g ".In the example illustrated in fig. 1 and 2, connected part 15 is made up of with the through hole 14 being arranged to be connected this peripheral groove 13 and stationary conduit 8f the peripheral groove 13 at the outer surface 8d place being arranged on stationary axle part 8a.
Below, the function of the connected part 15 in swivel joint 1 is described with reference to Fig. 3.Fig. 3 (a) illustrates such state, wherein fluid is supplied (see Fig. 1) by port hole 3b, ostium 7a (arrow " e "), flow through downwards stationary axle part 8a stationary conduit 8f and flow to rotary component 1a side (arrow " h ").The fluid be now supplied is freezing mixture, and this freezing mixture is used for circulating through lathe etc. and under many circumstances containing frittering bits and other foreign matters 18.Part foreign matter 18 flows into glade plane space " g " together with flowing into the fluid (arrow " f ") of glade plane space " g ".If these foreign matters repeatedly enter and deposit and stick in glade plane space " g ", result will hinder the level and smooth slip of stationary axle part 8a.
Also in this case, in the swivel joint 1 shown in present embodiment, owing to being arranged on the function of the connected part 15 at the upstream side place of clearance seal part 12, foreign matter 18 can be stoped to deposit and adhere in glade plane space " g ".That is, in swivel joint 1, fluid flows through the inside (arrow " h ") of stationary conduit 8f to downstream with (flow limited according to service condition and pressure) certain flow rate.On the other hand, the flow of the fluid in glade plane space " g " is clearance flow and resistance is very large.In addition, in the downstream side of glade plane space, it is cut off by clearance seal part 12, so the flow of this fluid is greatly different from the flow velocity in stationary conduit 8f in flow velocity.
For this reason, the static pressure of the fluid in stationary conduit 8f is less than the static pressure in glade plane space " g ", thus produces pressure reduction.Because this pressure reduction, flow because ejector effect (arrow " i ") to be produced as from glade plane space " g " through connected part 15 to stationary conduit 8f.Together with this flowing, the foreign matter 18 in glade plane space " g " moves to stationary conduit 8f and be discharged to downstream side (arrow " j ") together with the fluid in stationary conduit 8f.Therefore, the end face seal part 10 can stop and to deposit due to foreign matter 18 and to stick to the problem caused in glade plane space " g ", such as, the level and smooth slip of stationary axle part 8a is obstructed, usually being formed and the problem of a large amount of fluid leaks.
When the packing ring 12b that use combines with O type ring 12a is as clearance seal part 12, as described below, can realize the effect of removing foreign matter, this foreign matter is present in the scope in the downstream side of seal groove 7c or glade plane space " g " internal clearance hermetic unit 12.That is, when the starting working of swivel joint 1, start at fluid to be supplied in the process of hole 7a, in glade plane space " g ", there is no fluid.Fluid only flows through the inside of stationary conduit 8f.Because this flowing ejector effect arrives glade plane space " g " through connected part 15.Now, inner at glade plane space " g ", hydrodynamic pressure does not still work.Packing ring 12b does not still promote O type ring 12a, so ejector effect arrives the scope in the downstream side of clearance seal part 12 in seal groove 7c or glade plane space " g ".Thus, each swivel joint 1 repeated work also stops, and all can remove the foreign matter 18 be present in this scope, thus realize cleaning action.
The swivel joint 1 of the present embodiment is not limited to the configuration shown in Fig. 1.Various modification is all possible.Below, with reference to Fig. 4 to Fig. 8, some in these modification are described.First, Fig. 4 illustrates the swivel joint 1 of the second embodiment.This second embodiment illustrates an example, and wherein replace clearance seal part 12 (it is arranged on the inner peripheral surface 7b place of the hole 7a of the first embodiment), clearance seal part 12A is arranged on the outer surface 8d of stationary axle part 8a.That is, in a second embodiment, clearance seal part 12A is configured by annular seal element, and annular seal element is engaged in seal groove 8g by O type ring 12a and packing ring 12b and is formed, and seal groove 8g is arranged on the outer surface 8d of stationary axle part 8a.
Below, Fig. 5 illustrates the swivel joint 1 of the 3rd embodiment.3rd embodiment illustrates an example, wherein replace the outer surface 8d that peripheral groove 13 in the first embodiment is arranged on stationary axle part 8a, when swivel joint 1 works, peripheral groove 13A is arranged on the inner peripheral surface 7b place of hole 7a and connects the through hole 14A of peripheral groove 13A and stationary conduit 8f and be arranged on stationary axle part 8a place.That is, in the third embodiment, clearance seal part 12 is configured by annular seal element, and annular seal element is formed as being engaged in seal groove 7c by O type ring 12a and packing ring 12b and forms, and seal groove 7c is arranged on the inner peripheral surface 7b of hole 7a.Connected part 15A is made up of peripheral groove 13A and through hole 14A, the inner peripheral surface place separated with seal groove 7c that peripheral groove 13A is arranged on hole 7a.When the fixing seal componental movement be made up of floating seat 8 and end face seal part 10 is formed time, through hole 14A is arranged on stationary axle part 8a place and connects peripheral groove 13A and stationary conduit 8f.
Below, Fig. 6 illustrates the swivel joint 1 of the 4th embodiment.Namely, in the 4th embodiment, clearance seal part 12B is configured by annular seal element, and annular seal element is made up of O type ring 12a and packing ring 12b, O type ring 12a and packing ring 12b is engaged in seal groove 7f, and seal groove 7f is arranged on the inner peripheral surface 7b place of hole 7a.Here, the forming range of seal groove 7f is set as wide than usual.Size is set as that making apart section 7f* (having the 7f of asterisk) fixedly be in O type ring 12a and packing ring 12b coordinates and attached state.Stationary axle part 8a is provided with through hole 14B, and through hole 14B connects apart section 7f* and stationary conduit 8f.Namely, in the fourth embodiment, when floating seat 8 (it is provided with stationary axle part 8a and forms fixing seal part) motion and end face seal part 10 is formed time, connected part 15B is made up of the apart section 7f* of the seal groove 7f be connected to each other and through hole 14B.
Below, Fig. 7 illustrates the swivel joint 1 of the 5th embodiment.That is, in the 5th embodiment, clearance seal part 12C is configured by annular seal element, and annular seal element is engaged in seal groove 8h by O type ring 12a and packing ring 12b and forms, and seal groove 8h is arranged on the outer surface of stationary axle part 8a.In the mode identical with the 4th embodiment, the range set forming seal groove 8h is wider than usual.When O type ring 12a and packing ring 12b coordinates and be attached, size is set to and makes apart section 8h* be fixed on upstream side.Stationary axle part 8a is provided with through hole 14C, and through hole 14C connects apart section 8h* and stationary conduit 8f.That is, in the 5th embodiment, connected part 15C is made up of the apart section 8h* of seal groove 8h and through hole 14C, and apart section 8h* is arranged on stationary axle part 8a place, and through hole 14C is arranged to connect this apart section 8h* and stationary conduit 8f.
Notice, in the shown in Fig. 1 to Fig. 7 first to the 5th embodiment, this example is depicted as and makes stationary axle part 8a be provided with stationary conduit 8f, and stationary conduit 8f in axial direction extends and at 7a place, hole opening.As the 6th embodiment shown in Figure 8, also can provide hermetic unit 8i, hermetic unit 8i closes the side end of the stationary conduit 8f in stationary axle part 8a.In this case, in the 7a of hole, the augmenting portion 7e that inner diameter is increased is disposed across the scope of the side end of the upstream side corresponding to stationary axle part 8a.At stationary axle part 8a place, through hole 19 is arranged on the part place of the scope corresponding to this augmenting portion 7e, and through hole 19 connecting passage gap " s " (it is between augmenting portion 7e and outer surface 8a) and stationary conduit 8f.
In this configuration, due to the hydrodynamic pressure on closing section 8i, with the effect of fluid force F, be supplied to the fluid flow path gap " s " of hole 7a and arrive the inside (arrow " k ") of stationary conduit 8f through via hole 19.Thus, fluid is supplied to rotating channel 4e.Also in the configuration, can realize adhering in the mode identical with the example shown in the first embodiment to the 5th embodiment and be deposited on the removal effect of the foreign matter 18 in glade plane space " g ".In fig. 8, this example is depicted as and this configuration is applied to the first embodiment shown in Fig. 1, but this configuration can be applied to the second embodiment similarly to the 5th embodiment.
As explained above, in the present embodiment, provide the rotational structure 1 of configuration like this, be provided with revolving part 4 (rotating channel 4e is in axial direction arranged in revolving part 4) and floating seat 8 (stationary conduit 8f is in axial direction arranged in floating seat) in the configuration.Swivel joint 1 and floating seat 8 are arranged coaxially.First sealing surfaces 5b of revolving part 4 and the second sealing surfaces 9b of floating seat 8 contacts to form end face seal part 10.When the stationary axle part 8a of floating seat 8 is engaged in the hole 7a of housing element 7, produce glade plane space " g ".Glade plane space " g " is sealed by clearance seal part 12.In a state in which, at the upstream side of glade plane space " g ", it is inner that connected part 15 is in axial direction arranged on stationary axle part 8a, and be communicated with stationary conduit 8f and glade plane space " g ", moves to stationary conduit 8f to allow fluid from glade plane space " g ".
Thus, the flow velocity of the fluid in stationary conduit 8f can be utilized to produce ejector effect, to cause the fluid motion from glade plane space " g " to stationary conduit 8f.Can also by simply effectively preventing because foreign matter enters glade plane space " g " between stationary axle part 8a and hole 7a and the problem depositing there and solidify and cause.
Industrial applicibility
Swivel joint of the present invention has following characteristics, wherein by simply effectively preventing because foreign matter enters the glade plane space between stationary axle part and hole and the problem depositing there and solidify and produce.Therefore, the present invention for cooling liquid air or other fluids supply the axle of lathe or the application of other rotary components be useful.
Reference numerals list
1 swivel joint
1a rotary component
1b fixed component
2 axles
3 casing members
4 revolving parts
4e rotating channel
5 first seal rings
5b first sealing surfaces
8 floating seats
8a stationary axle part
8f stationary conduit
9 second seal rings
9b second sealing surfaces
10 end face seal parts
12,12A, 12B, 12C clearance seal part
13,13A, 13B, 13C peripheral groove
14,14A, 14B, 14C through hole
15,15A, 15B, l5C connected part
18 foreign matters
Claims (6)
1. one kind for arranging the swivel joint of rotary component and fixed component coaxially, rotating channel is in axial direction arranged in described rotary component and described rotary component is attached to running shaft, stationary conduit along described axial direction is arranged in described fixed component and described fixed component is fixed to holding member, and
By described stationary conduit, fluid is fed to the described rotating channel of the described rotary component rotated around its axle center from fluid provider,
Described swivel joint comprises:
There is the rotary seal portion of the first sealing surfaces, wherein said rotary seal portion be arranged on described rotary component place and described rotating channel at described first sealing surfaces opening, described first sealing surfaces is the side end of described rotary component,
There is the fixing seal part of stationary axle part and the second sealing surfaces,
Wherein said stationary conduit is formed in described stationary axle part along described axial direction,
Wherein said stationary axle part is engaged in the hole be arranged in described holding member and keeps predetermined glade plane space simultaneously, to allow described stationary axle part moving along described axial direction, and
Wherein said stationary conduit is at described second sealing surfaces place opening, and described second sealing surfaces is the side end of described fixed component,
Clearance seal part, it seals described glade plane space and allows to move along the described of described axial direction simultaneously,
End face seal part, it is formed through and described fluid is fed to the inside in described hole from described fluid source and promotes the side end of the opposite side of described stationary axle part, make described first sealing surfaces and described second sealing surfaces intimate contact with one another, and
Connected part, it is arranged on described clearance seal part place in the upstream of described glade plane space, wherein said connected part makes described glade plane space be communicated with described stationary conduit, to allow fluid to move to described stationary conduit from described glade plane space.
2. swivel joint according to claim 1, wherein said connected part comprises peripheral groove and through hole, and described peripheral groove is arranged on the outer surface place of described stationary axle part, and described through hole is arranged to connect described peripheral groove and described stationary conduit.
3. swivel joint according to claim 2, wherein said clearance seal part comprises annular seal element, and described annular seal element is engaged in seal groove, and described seal groove is arranged in the outer surface of described stationary axle part.
4. swivel joint according to claim 1, wherein said connected part comprises:
Be arranged on the peripheral groove at the inner peripheral surface place in described hole, and
Through hole, its be arranged on described stationary axle part place and when described fixing seal componental movement and described end face seal part formed time connect described peripheral groove and described stationary conduit.
5. swivel joint according to claim 4, wherein said clearance seal part comprises annular seal element, and described annular seal element is engaged in seal groove, and described seal groove is arranged in the inner peripheral surface in described hole, and
Described connected part comprises:
Peripheral groove, it is arranged on the described inner peripheral surface place separated with described seal groove, and
Through hole, its be arranged on described stationary axle part place and when described fixing seal componental movement and described end face seal part formed time connect described peripheral groove and described stationary conduit.
6. swivel joint according to claim 1, wherein said clearance seal part comprises:
Annular seal element, described annular seal element is engaged in seal groove, and described seal groove is arranged in the outer surface of described stationary axle part, and
Described connected part comprises described seal groove and through hole, and described through hole is arranged to connect sealing groove and described stationary conduit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011214950A JP5063804B1 (en) | 2011-09-29 | 2011-09-29 | Rotary joint |
| JP2011-214950 | 2011-09-29 | ||
| PCT/JP2012/066047 WO2013046831A1 (en) | 2011-09-29 | 2012-06-22 | Rotary joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103827565A CN103827565A (en) | 2014-05-28 |
| CN103827565B true CN103827565B (en) | 2015-09-09 |
Family
ID=47189618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280047505.2A Active CN103827565B (en) | 2011-09-29 | 2012-06-22 | Swivel joint |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5063804B1 (en) |
| CN (1) | CN103827565B (en) |
| DE (1) | DE112012004101B4 (en) |
| WO (1) | WO2013046831A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5916545B2 (en) * | 2012-07-11 | 2016-05-11 | リックス株式会社 | Rotary joint |
| JP5980891B2 (en) * | 2014-12-16 | 2016-08-31 | ファナック株式会社 | Rotary joint support structure, machine tool spindle and electric motor |
| CN105965039A (en) * | 2016-06-29 | 2016-09-28 | 科德数控股份有限公司 | High-speed rotary joint and using method thereof |
| CN112317778B (en) * | 2020-10-23 | 2022-09-06 | 广州市昊志机电股份有限公司 | Electric spindle and machine tool |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4976282A (en) | 1989-04-12 | 1990-12-11 | Deublin Company | Coolant union with fluid actuated seal assembly |
| JPH07109270B2 (en) * | 1991-03-28 | 1995-11-22 | 東海ゴム工業株式会社 | Swivel fittings |
| DE19820362A1 (en) * | 1998-05-07 | 1999-11-18 | Gat Gmbh | Device for transferring a fluid |
| JP3074166B1 (en) * | 1999-02-08 | 2000-08-07 | リックス株式会社 | Seal structure of floating shaft support |
| JP3058632B1 (en) * | 1999-03-26 | 2000-07-04 | リックス株式会社 | Ultra-low resistance sliding seal structure with O-ring |
| JP3072349B1 (en) * | 1999-07-13 | 2000-07-31 | リックス株式会社 | Bearing protection structure for rotary joint |
| CN2769655Y (en) * | 2005-03-09 | 2006-04-05 | 吴小肖 | High-speed rotary joint |
| JP4426538B2 (en) * | 2006-02-14 | 2010-03-03 | リックス株式会社 | Rotary joint |
| JP4542114B2 (en) * | 2007-04-11 | 2010-09-08 | リックス株式会社 | Rotary seal mechanism and rotary joint in fluid feed mechanism |
-
2011
- 2011-09-29 JP JP2011214950A patent/JP5063804B1/en active Active
-
2012
- 2012-06-22 DE DE112012004101.1T patent/DE112012004101B4/en active Active
- 2012-06-22 WO PCT/JP2012/066047 patent/WO2013046831A1/en active Application Filing
- 2012-06-22 CN CN201280047505.2A patent/CN103827565B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013076422A (en) | 2013-04-25 |
| DE112012004101B4 (en) | 2021-09-30 |
| WO2013046831A1 (en) | 2013-04-04 |
| JP5063804B1 (en) | 2012-10-31 |
| CN103827565A (en) | 2014-05-28 |
| DE112012004101T5 (en) | 2014-08-07 |
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