CN102086867B - Fluid machine - Google Patents
Fluid machine Download PDFInfo
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- CN102086867B CN102086867B CN201010584985.9A CN201010584985A CN102086867B CN 102086867 B CN102086867 B CN 102086867B CN 201010584985 A CN201010584985 A CN 201010584985A CN 102086867 B CN102086867 B CN 102086867B
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- Prior art keywords
- connectivity hole
- air connectivity
- bearing
- rotor chamber
- air
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- Expired - Fee Related
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Abstract
A fluid machine has accommodated therein a spiral rotor of which the male and female threads are engaged. A rotor chamber, of which air intakes from one side and exhausts from the other side, has air pores communicating with a bearing of a rotor shaft supporting the spiral rotor. One side connects with the air pores and the other side has a setting valve arranged on an air path communicating with ambient air. When the inner pressure of the air path is higher than predetermined pressure, the valve allows only air in the air path flows to ambient air. Such a structure can prevent impurities from flowing into the machine.
Description
Technical field
The present invention relates to the fluid machinery such as compressor and decompressor, relate in particular to the fluid machinery that steam is used as to the fluid of pressurization use or drives the medium of use.
Background technique
There is a kind of screw compressor in past, is the contactless shaft sealing being communicated with air connectivity hole is set on the housing between rotor chamber and the bearing of supporting rotor axle.On this compressor, when the gas leaking to shaft sealing side when the suction side from rotor chamber is malleation, gas leakage is discharged through air connectivity hole, can avoid the pressure of shaft sealing to raise.But the gas leaking to shaft sealing side when the suction side from rotor chamber is while being negative pressure, will be from the air connectivity hole air amount of rotor chamber side, and suck the oil of a little bearing side from the contactless shaft sealing of bearing side.
Therefore, on screw compressor in the past, the contactless shaft sealing for fear of oil from bearing side sucks, and the shaft sealing being communicated with other air connectivity hole is set between air connectivity hole and bearing, becomes negative pressure with the shaft sealing of avoiding bearing side.But, although the screw compressor in past has solved the problems referred to above, but produce from the shaft sealing of bearing side through air connectivity hole and to the problem of outside leakage of oil.
For this reason, the flat No. 10-103265 disclosed screw compressor of Japanese Patent Application Laid-Open makes oil return to the store oil portion of enclosure interior from the shaft sealing of bearing side by drain flow path is set, and solved the problems referred to above.
But, produced again other problem, that is, when the gas leaking is negative pressure, understands from air connectivity hole air amount, and can suck impurity when the suction side from rotor chamber to shaft sealing side, also can make the quality of Exhaust Gas low inferior.
Summary of the invention
The object of the present invention is to provide a kind of fluid machinery that can prevent that impurity from flowing into from outside.
To achieve these goals, fluid machinery of the present invention has rotor chamber, this rotor chamber is accommodated the helical rotor of internal and external threads engagement, and from a side draught gas and from opposite side exhaust, described helical rotor is supported by bearing, between described rotor chamber and described bearing, there is air connectivity hole, in this fluid machinery, be provided with atmosphere access, one side of this atmosphere access is connected with described air connectivity hole, opposite side is to atmosphere opening, and in described atmosphere access, valve is set, once the force value that the inner pressure ratio of described atmosphere access specifies is high, this valve is just opened in the mode that only allows to flow to atmosphere from described atmosphere access.
Adopt said structure, air connectivity hole between rotor chamber and bearing is connected with atmosphere access, and in atmosphere access, arrange only to allow flowing to from atmosphere access the valve that the mode of atmosphere is opened, can avoid thus air pass through atmosphere access and flow into air connectivity hole.Thereby can prevent that impurity from flowing into atmosphere access and air connectivity hole and then flowing into rotor chamber from outside.In addition, when the force value that specifies is high, valve is opened at the inner pressure ratio of atmosphere access, atmosphere access and air connectivity hole can be maintained below the force value of regulation.
Preferably, described air connectivity hole comprises the 1st air connectivity hole that is arranged on close described rotor chamber one side between described rotor chamber and described bearing, with be arranged on the 2nd air connectivity hole near described bearing one side than described the 1st air connectivity hole, and the 1st sealing component being sealed between described rotor chamber and described the 1st air connectivity hole is set, by the 2nd sealing component being sealed between described the 1st air connectivity hole and described the 2nd air connectivity hole, and by the 3rd sealing component being sealed between described the 2nd air connectivity hole and described bearing, and described atmosphere access is connected with described the 1st air connectivity hole.
Preferably, described atmosphere access is connected with the suction side of described rotor chamber and discharge side both sides' described air connectivity hole.Adopt said structure, can avoid atmosphere to pass through atmosphere access and flow into air connectivity hole in suction side and the discharge side of rotor chamber.Thereby can prevent that impurity from flowing into atmosphere access and air connectivity hole and then flowing into rotor chamber from outside.In addition, when the force value that specifies is high, valve is opened at the inner pressure ratio of atmosphere access, atmosphere access and air connectivity hole can be maintained below the force value of regulation.By suction side is connected with the atmosphere access of discharging side both sides, can share 1 valve, thereby can reduce costs.
Adopt the present invention, by the air connectivity hole between rotor chamber and bearing is connected with atmosphere access, and in atmosphere access, arrange only to allow flowing to from atmosphere access the valve that the mode of atmosphere is opened, can prevent that thus impurity from flowing into atmosphere access and air connectivity hole and then flowing into rotor chamber from outside.In addition, when the force value that specifies is high, valve is opened at the inner pressure ratio of atmosphere access, atmosphere access and air connectivity hole can be maintained below the force value of regulation.
Brief description of the drawings
Fig. 1 is the figure that represents the fluid machinery the present invention relates to.
Fig. 2 is the partial enlarged drawing of the fluid machinery that the present invention relates to.
Fig. 3 is the figure of indicated object gas in the flow direction of the fluid machinery inside the present invention relates to.
Fig. 4 is the figure that has represented to pass through the route of the object gas Returning fluid machinery after the valve of atmosphere access.
Embodiment
Below, accompanying drawings embodiments of the present invention.
Fig. 1 represents the fluid machinery the present invention relates to.So-called fluid machinery, is oil free screw compressor or revolve decompressor without whelk for example, in the present embodiment, is oil free screw compressor 1.Screw compressor 1 is to use a pair of helical rotor 4 of the internal and external threads engagement in the rotor chamber 3 that is housed in housing 2 to carry out compressed object gas.In figure, simplify the structure of housing 2 and helical rotor 4.
On housing 2, be provided with by the object gas of need compressions supply with the suction port 5 of rotor chamber 3, by the exhaust port 6 and bearing shaft seal space 8A and the 8B that are discharged at the object gas that rotor chamber 3 is interior after being compressed by helical rotor 4, this bearing shaft seal space 8A and 8B are in suction side with discharge side and arrange respectively rotor shaft 7a, the 7b of helical rotor 4 are supported and the structure of shaft sealing.Bearing shaft seal space 8A, 8B and the member that is disposed in bearing shaft seal space 8A, 8B described later are with respect to axially configuration symmetrically of rotor chamber 3.Below, the A in label represents to be positioned at respect to rotor chamber 3 member of suction side, and B represents to be positioned at the member of discharging side with respect to rotor chamber 3.From rotor shaft 7a, the axle center of 7b, suction port 5 and exhaust port 6 are configured to one upper, another under, but in figure in order to simplify, suction port 5 and exhaust port 6 are all shown in to the top in above-mentioned axle center.Rotor shaft 7a, 7b is arranged on the bearing 11 in the bearing shaft seal space 8A of suction side and is arranged on that bearing 12 in the bearing shaft seal space 8B that discharges side supports and rotatable.As shown in Figure 2, bearing 11,12 is by inner ring 11a, 12a, outer ring 11b, 12b and the roller 11c that rotates between inner ring 11a, 12a and outer ring 11b, 12b, and 12c forms, and is known structure.
In bearing shaft seal space 8A, 8B, from rotor chamber 3 sides, be provided with successively respectively the 1st air connectivity hole 13A, the 13B and the 2nd air connectivity hole 14A, the 14B that between bearing shaft seal space 8A, 8B and the outside of housing 2, connect.
Between rotor chamber 3 and the 2nd air connectivity hole 14A, 14B, be provided with at housing 2 and rotor shaft 7
Between a, 7b by the 1st sealing component 15A, the 15B that are sealed between rotor chamber 3 and the 1st air connectivity hole 13A, 13B.In the present embodiment, the 1st sealing component 15A, 15B are contactless labyrinth sealing members.On the 1st sealing component 15A, 15B, on the position corresponding with the 1st air connectivity hole 13A, 13B (subrange of circumferencial direction), be provided with the 1st sealing component through hole 16A, the 16B of the outer circumferential face of the 1st sealing component 15A, 15B and internal run-through.For the surface of contact between the 1st sealing component 15A, 15B and housing 2 is sealed, on the end face that is positioned at rotor chamber 3 one sides of the 1st sealing component 15A, 15B, be provided with O type ring 17A, 17B.Superfine gap between the 1st air connectivity hole 13A, 13B the 1st sealing component through hole 16A, 16B by the 1st sealing component 15A, 15B and the 1st sealing component 15A, 15B and rotor shaft 7a, 7b and being communicated with rotor chamber 3.
Between the 1st air connectivity hole 13A, 13B and the 2nd air connectivity hole 14A, 14B, between housing 2 and rotor shaft 7a, 7b, be provided with rotor chamber side component of the spring seat 20A described later, 20B, and be provided with the 2nd sealing component 18A, the 18B that are sealed between the 1st air connectivity hole 13A, 13B and the 2nd air connectivity hole 14A, 14B.In the present embodiment, the 2nd sealing component 18A, 18B are contactless labyrinth sealing members.A side at the close rotor chamber 3 of the 2nd sealing component 18A, 18B forms evagination edge 19A, 19B.The end face that is positioned at rotor chamber 3 one sides of evagination edge 19A, the 19B of the 2nd sealing component 18A, 18B and the end face butt that is positioned at bearing 11,12 1 sides of the 1st sealing component 15A, 15B.The end face that is positioned at bearing 11,12 1 sides of evagination edge 19A, the 19B of the 2nd sealing component 18A, 18B and rotor chamber side component of the spring seat 20A described later, the convex edge 21A of 20B, 21B butt.
Rotor chamber side component of the spring seat 20A, 20B are the drums of both-side opening, and are provided with convex edge 21A, the 21B outstanding to radially inner side in the end that is positioned at bearing 11,12 1 sides.Rotor chamber side component of the spring seat 20A, 20B are with outer circumferential face and housing 2 butts of drum.For by rotor chamber side component of the spring seat 20A, 20B's and housing 2 between surface of contact sealed, on the outer circumferential face of rotor chamber side component of the spring seat 20A, 20B, be provided with O type ring 22A, 22B.
Than a side of rotor chamber side component of the spring seat 20A, the more close bearing 11,12 of 20B, separate specified gap vertically and be equipped with bearing side component of the spring seat 25A, 25B.Bearing side component of the spring seat 25A, 25B are the drums of both-side opening, and are provided with convex edge 26A, the 26B outstanding to radially inner side in the end that is positioned at bearing 11,12 1 sides.Bearing side spring seat 25A, 25B are arranged to convex edge 26A, 26B and rotor shaft 7a, gapped state between 7b.Than a side of bearing side component of the spring seat 25A, the more close bearing 11,12 of 25B, rotor shaft 7a, 7b form stepped part 27A, 27B and diameter reduction.
Between rotor chamber side component of the spring seat 20A, 20B and bearing side component of the spring seat 25A, 25B, be provided with spring component 28A, 28B.Utilize component of the spring seat 28A, 28B, convex edge 21A, the 21B of rotor chamber side spring component 20A, 20B are pressed to rotor chamber 3 thrusters, and convex edge 26A, the 26B of bearing side spring component 25A, 25B are pressed to bearing 11,12 thrusters.Spring component 28A, 28B push the 1st sealing component 15A, 15B by rotor chamber component of the spring seat 20A, 20B and the 2nd sealing component 18A, 18B.
On rotor shaft 7a, 7b, be provided with the member 29A of surrounding, the 29B of the drum of both-side opening.A side that is positioned at rotor chamber 3 of member 29A, 29B is provided with evagination edge 30A, 30B around.Under the state of the end face that is positioned at rotor chamber 3 one sides of member 29A, 29B and the stepped part 27 of rotor shaft 7a, 7b, 27B butt, around member 29A, 29B and rotor shaft 7a, 7b form as one around.Around member 29A, 29B are at inner ring 11a, the 11b butt of a side contrary with rotor chamber 3 and bearing 11,12.
Than a side of bearing side spring seat 25A, the more close bearing 11,12 of 25B, separate specified gap vertically and be equipped with outer ring fixed component 31A, 31B.Outer ring fixed component 31A, 31B are the drums of both-side opening.In outer ring fixed component 31A, 31 the end that is positioned at bearing 11,12 1 sides, be provided with the outer ring fixing part 32A, the 32B that are formed as outward flange shape.Outer ring fixing part 32A, 32B be near a side and housing 2 butts of rotor chamber 3, and at outer ring 11b, the 12b butt of a side contrary with rotor chamber 3 and bearing 11,12., outer ring fixing part 32A, 32B form in bearing shaft seal space 8A, 8B by above-mentioned butt roughly and the partition wall of parallel to an axis.At outer ring fixing part 32A, 32B, be provided with oily opening 33A, the 33B of the inner side of partition wall in bearing shaft seal space 8A, 8B and outside perforation.Make the inner loop of oil at screw compressor 1 by oily opening 33A, 33B.In the end that is positioned at rotor chamber 3 one sides of outer ring fixed component 31A, 31B, be provided with convex edge 34A, the 34B outstanding to radially inner side.The state that convex edge 34A, the 34B of outer ring fixed component 31A, 31B is formed as not with around evagination edge 30A, the 30B of member 29,29B interfere.For by outer ring fixed component 31A, 31B's and housing 2 between surface of contact sealed, be provided with O type ring 35A, 35B at the outer circumferential face of outer ring fixed component 31A, 31B.Between bearing side component of the spring seat 25A, 25B and outer ring fixed component 31A, 31B, in the subrange of circumferencial direction, be provided with respectively intermediate member 36A, 36B with their butts.Intermediate member 36A, 36B are made up of circular-arc (crescent) at least 2 above primary structural components, and are provided with gap (not shown) between these primary structural components.Thereby, utilize spring component 28A, 28B, push outer ring fixed component 31A, 31B by bearing side component of the spring seat 25A, 25B and intermediate member 36A, 36B.The 2nd air connectivity hole 14A, 14B is by being inserted in bearing side component of the spring seat 25A, 25B and outer ring fixed component 31A, intermediate member 36A between 31B, the upper set gap of 36B (more specifically says and forms intermediate member 36A, circular-arc (crescent) the primary structural component gap each other of 36B), bearing side component of the spring seat 25A, the convex edge 26A of 25B, 26B and rotor shaft 7a, gap between 7b, the 2nd sealing component 18A, 18B and rotor shaft 7a, gap between 7b, the 1st sealing component through hole 16A, 16B, and the 1st sealing component 15A, 15B and rotor shaft 7a, gap between 7b and being communicated with rotor chamber 3.
For the inner peripheral surface at outer ring fixed component 31A, 31B and convex edge 34A, 34B and around there is surface of contact between member 29A, 29B, be provided with the 3rd sealing component 37A, 37B.In the present embodiment, the 3rd sealing component 37A, 37B are lip seal members.The 3rd sealing component 37A, 37B have the bearing lateral lip 38A of portion, 38B and the rotor chamber lateral lip 39A of portion, 39B.The 3rd sealing component 37A, 37B are pressed into and are fixed on outer ring fixed component 31A, 31B.The bearing lateral lip 38A of portion, the 38B of the 3rd sealing component 37A, 37B flows into rotor chamber 3 one sides and sealing for the oil that prevents bearing 11,12, and the rotor chamber lateral lip 39A of portion, 39B to flow into bearing 11,12 1 sides and seal from the gas leakage of the object gas of rotor chamber 3 and the 1st air connectivity hole 13A, 13B and the 2nd air connectivity hole 14A, 14B mono-side in order to prevent.
In a side of the close rotor chamber 3 of bearing 11,12, inner ring 11a, 12a and around member 29A, 29B butt, and outer ring 11b, 12b and outer ring fixed component 31A, 31B butt, in a side contrary with rotor chamber 3, with sealing component butt not shown in the figures, thereby fix in the inside of bearing shaft seal space 8A, 8B.
Rotor shaft 7a connects sealing component not shown in the figures and extends from the bearing shaft seal space 8A of suction side, is connected with motor not shown in the figures.
The state extending with the outside from the 1st air connectivity hole 13A, 13B to housing 2 is provided with atmosphere access 40A, 40B.Atmosphere access 40A and atmosphere access 40B interflow.Be provided with valve 41 in a side that is positioned at atmosphere access 40A, 40B front end with respect to the part at above-mentioned interflow, once the force value that atmosphere access 40A, the inner pressure ratio of 40B specify is high, this valve 41 is just opened in the mode that only allows to flow to atmosphere from atmosphere access 40A, 40B.The design of pressure of regulation is force value more than barometric pressure.Valve 41 in the present embodiment is the valve of release pressure adjustable type, and its release pressure is set as 20kPaG.Due to atmosphere access 40B and atmosphere access 40A interflow, and the valve 41 that is disposed in atmosphere access 40A, the 40B forward end of interflow part can not be opened reaching before the force value of regulation, therefore from the 1st air connectivity hole 13B through atmosphere access 40A, 40B till the inside of air connectivity hole 13A has formed enclosed space.
The action of the screw compressor 1 that adopts said structure is described below.Screw compressor 1 sucks object gas the compression volume not shown in the figures of helical rotor 4 from suction passage not shown in the figures by suction port 5.The engagement of the helical rotor 4 by internal and external threads is compressed object gas in above-mentioned compression volume, and makes to discharge to discharge stream not shown in the figures from the exhaust port 6 of helical rotor 4 through the object gas of overcompression.In the present embodiment, from suction passage through suction port 5 and the object gas that is inhaled into is for example 0.05MPaA, 81 DEG C.In addition, be for example 0.9MPaA, 175.3 DEG C from discharging object gas that stream discharges through exhaust port 6.
In the time running well, the suction side of rotor chamber 3 is negative pressure or malleation, and discharging side is malleation.On the other hand, between housing 2 and rotor shaft 7a, 7b and between the 1st sealing component 15A, 15B and rotor shaft 7a, 7b, be respectively equipped with gap, therefore when produce pressure difference between rotor chamber 3 and the 1st air connectivity hole 13A, 13B time, object gas just moves by above-mentioned gap.And mobile object gas is in the diffusion inside of above-mentioned enclosed space.
Specifically as shown in Figure 3, in the discharge side of the highest rotor chamber 3 of the internal pressure of housing 2, pass through the gap between housing 2 and rotor shaft 7b and between the 1st sealing component 15B and rotor shaft 7b and leak to the 1st air connectivity hole 13B through the object gas of overcompression.Then, from the 1st air connectivity hole 13B through atmosphere access 40B, atmosphere access 40A and to the 1st air connectivity hole 13A diffusion.So, leak through the object gas of overcompression, thereby flow in rapid succession above-mentioned enclosed space and make inner pressure rise.Then,, once inner pressure reaches setting value, i.e. 20kPaG, valve 41 is just opened, thereby the object gas through overcompression is discharged to outside from atmosphere access 40A, 40B.Then valve 41 cuts out, and makes the force value of above-mentioned enclosed space maintain 20kPaG.In addition, on the 2nd sealing component 18A, 18B, the 1st air connectivity hole 13A, 13B side maintain malleation, the 2nd air connectivity hole 14A, 14B side maintain barometric pressure, therefore just pass through the gap between the 2nd sealing component 18A, 18B and rotor shaft 7a, 7b through the object gas of overcompression, also leak to the 2nd air connectivity hole 14A, 14B.The object gas leaking to the 2nd air connectivity hole 14A, 14B is discharged to the outside of housing 2.
In the suction side of rotor chamber 3, as mentioned above, above-mentioned enclosed space, the force value of the 1st air connectivity hole 13A maintains 20kPaG, and a side of the close rotor chamber 3 of the 1st sealing component 15A is negative pressure, therefore leak to rotor chamber 3 through the gap between the 1st sealing component 15A and rotor shaft 7a and housing 2 and rotor shaft 7a through the object gas of overcompression.
Like this, by arrange only allow to flow to from atmosphere access 40A, 40B the valve 41 that the mode of atmosphere is opened in atmosphere access 40A, 40B, can prevent that air from flowing into atmosphere access 40A, 40B from outside.In addition, on the 2nd sealing component 18A, 18B, the 1st air connectivity hole 13A, 13B side maintain malleation, and the 2nd air connectivity hole 14A, 14B side maintain barometric pressure, therefore can also prevent that air from flowing into from the 2nd air connectivity hole 14A, 14B.Thereby, can prevent that impurity from flowing into atmosphere access 40A, 40B and air connectivity hole 13A, 13B, 14A, 14B and then inflow rotor chamber 3 from outside.
In the time that running stops, the object gas that becomes relatively high pressure in the compression volume (not shown) of the discharge side of helical rotor 4 inside flows back to the compression volume (not shown) of the suction side that becomes relatively low pressure.When the force value of this object gas is in the time that a side of the close rotor chamber 3 of the 1st sealing component 15A is larger than 20kPaG, the object gas of refluence is just through the gap between housing 2 and rotor shaft 7a and between the 1st sealing component 15A and rotor shaft 7a and to the 1st air connectivity hole 13A leakage.In addition, as mentioned above, object gas leaks to the 2nd air connectivity hole 14A through the gap between the 2nd sealing component 18A and rotor shaft 7a, and discharges to the outside of housing 2.Object gas is identical when running well in the leakage of the discharge side of rotor chamber 3.Thereby, can prevent that impurity from flowing into atmosphere access 40A, 40B and air connectivity hole 13A, 13B, 14A, 14B and then inflow rotor chamber 3 from outside.
When startup, be still from running is while stopping and be trapped in the state in above-mentioned enclosed space through the object gas of overcompression, therefore same when running well, the 1st air connectivity hole 13A, 13B can not become negative pressure.Thereby, can prevent that impurity from flowing into atmosphere access 40A, 40B and air connectivity hole 13A, 13B, 14A, 14B and then inflow rotor chamber 3 from outside.In addition, on the 2nd sealing component 18A, 18B, the 1st air connectivity hole 13A, 13B side maintain malleation, and the 2nd air connectivity hole 14A, 14B side maintain barometric pressure, therefore can also prevent that air is from the 2nd air connectivity hole 14A, 14B mono-side inflow.Thereby, can prevent that impurity from flowing into rotor chamber 3 from outside.
Embodiments of the present invention are more than described, but have the invention is not restricted to above-mentioned mode of execution, also can do various distortion.Example as shown in Figure 4, can also arrange the stream that near that is disposed in the outlet of the valve 41 in atmosphere access 40A, 40B and the suction port 5 of screw compressor 1 is connected.Now, can avoid heat that the object gas leaking from the discharge side of rotor chamber 3 has to airborne release.Shown in dotted line, also can not return near of suction port 5, but return to pocketed oil space (rotor chamber 3 between suction port 5 and exhaust port 6).Now, the power of rotor shaft 7a, 7b increases, and can make the discharge capacity increase of object gas measure accordingly with the amount of returning to pocketed oil space.
In the invention described above mode of execution, be for screw compressor by screw fluid machine of the present invention.But screw fluid machine of the present invention is not limited to screw compressor, be also applicable to spiral expansion machine.
In the time that the present invention is used for to spiral expansion machine, can be the structure roughly the same with above-mentioned screw compressor 1, but the sense of rotation of helical rotor 4 and the flow direction of fluid be contrary.Thereby the suction port 5 in above-mentioned mode of execution just becomes the exhaust port (relief opening) of spiral expansion machine, exhaust port 6 becomes the suction port (intakeport) of spiral expansion machine.In spiral expansion machine, fluid is not by compression, but by expansion, helical rotor 4 is rotated.The hydrodynamic pressure of therefore discharging side is lower than the hydrodynamic pressure of suction side.In addition, above-mentioned screw compressor 1 is that motor prime movers is connected with rotor shaft 7a, 7b, and spiral expansion machine is on same position, to connect generator even load equipment.
Claims (3)
1. a fluid machinery, has rotor chamber, and this rotor chamber is accommodated the helical rotor of internal and external threads engagement, and from a side draught gas and from opposite side exhaust, described helical rotor is supported by bearing, between described rotor chamber and described bearing, there is air connectivity hole, it is characterized in that
Be provided with atmosphere access, a side of this atmosphere access is connected with described air connectivity hole, and opposite side is to atmosphere opening,
And in described atmosphere access, valve is set, once the force value that the inner pressure ratio of described atmosphere access specifies is high, this valve is just opened in the mode that only allows to flow to atmosphere from described atmosphere access.
2. fluid machinery as claimed in claim 1, is characterized in that,
Described air connectivity hole comprises and is arranged between described rotor chamber and described bearing near the 1st air connectivity hole of described rotor chamber one side and is arranged on the 2nd air connectivity hole near described bearing one side than described the 1st air connectivity hole,
And arrange: by the 1st sealing component being sealed between described rotor chamber and described the 1st air connectivity hole,
By the 2nd sealing component being sealed between described the 1st air connectivity hole and described the 2nd air connectivity hole,
And by the 3rd sealing component being sealed between described the 2nd air connectivity hole and described bearing,
And described atmosphere access is connected with described the 1st air connectivity hole.
3. as claim 1 or fluid machinery claimed in claim 2, it is characterized in that, described bearing comprises the bearing of suction side and discharges the bearing of side, described air connectivity hole comprises the air connectivity hole of the discharge side between air connectivity hole and described rotor chamber and the bearing of described discharge side of the suction side between described rotor chamber and the bearing of described suction side, and the suction side of described atmosphere access and described rotor chamber and the described air connectivity hole of discharging side both sides are connected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009275585A JP4967012B2 (en) | 2009-12-03 | 2009-12-03 | Fluid machinery |
| JP2009-275585 | 2009-12-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102086867A CN102086867A (en) | 2011-06-08 |
| CN102086867B true CN102086867B (en) | 2014-12-10 |
Family
ID=44098806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010584985.9A Expired - Fee Related CN102086867B (en) | 2009-12-03 | 2010-12-02 | Fluid machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4967012B2 (en) |
| CN (1) | CN102086867B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2169722Y (en) * | 1993-04-18 | 1994-06-22 | 周龙生 | High effect energy saving pressure increasing device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03213692A (en) * | 1990-01-17 | 1991-09-19 | Chiyoudendou Hatsuden Kanren Kiki Zairyo Gijutsu Kenkyu Kumiai | Shaft seal device for oilless screw compressor |
| JP3742158B2 (en) * | 1996-10-01 | 2006-02-01 | 株式会社神戸製鋼所 | Oil-free screw compressor |
| JP4804927B2 (en) * | 2006-01-17 | 2011-11-02 | 株式会社神戸製鋼所 | Screw compressor |
| JP2008255797A (en) * | 2007-03-30 | 2008-10-23 | Anest Iwata Corp | Rotor shaft seal device of oil-free rotary compressor |
-
2009
- 2009-12-03 JP JP2009275585A patent/JP4967012B2/en not_active Expired - Fee Related
-
2010
- 2010-12-02 CN CN201010584985.9A patent/CN102086867B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2169722Y (en) * | 1993-04-18 | 1994-06-22 | 周龙生 | High effect energy saving pressure increasing device |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2007-192046A 2007.08.02 * |
| JP特开平10-103265A 1998.04.21 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011117372A (en) | 2011-06-16 |
| JP4967012B2 (en) | 2012-07-04 |
| CN102086867A (en) | 2011-06-08 |
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