CN109790836A - Oilless (oil free) compressor and its method of operation - Google Patents
Oilless (oil free) compressor and its method of operation Download PDFInfo
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- CN109790836A CN109790836A CN201780060240.2A CN201780060240A CN109790836A CN 109790836 A CN109790836 A CN 109790836A CN 201780060240 A CN201780060240 A CN 201780060240A CN 109790836 A CN109790836 A CN 109790836A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Oilless (oil free) compressor (1) has: the 1st grade of compressor main body (4) without oil feeding type；The 2nd grade of compressor main body (6) without oil feeding type, is connected to the downstream of the 1st grade of compressor main body (4) in the air flow path；Inlet valve (2) is connected to the upstream of the 1st grade of compressor main body (4) in the air flow path；It is piped (8e), the off-take point (P1) between the 1st grade of compressor main body (4) and the 2nd grade of compressor main body (6) is connect in a manner of air flow with the junction of two streams (P2) between inlet valve (2) and the 1st grade of compressor main body (4)；And separator valve (26), the flow path of the air in piping (8e) can be cut off and be arranged, progress opening action synchronous with the closing motion of inlet valve.
Description
Technical field
This disclosure relates to oilless (oil free) compressor and its method of operation.
Background technique
Oilless (oil free) compressor is mostly by as high efficiency and environment amenable compressor uses.In oilless (oil free) compressor, have with 2
Stage is by the structure of 2 grades of types of gas compression.Such as Patent Document 1 discloses such 2 grades of type oilless (oil free) compressors.
Patent document 1: Japanese Unexamined Patent Publication 2002-138977 bulletin.
Within the compressor, there are following problems: if temporarily stopped operating, to the spray for starting running and being needed again
The time is spent until pressure out.The generation of the problem in order to prevent has by inlet valve throttling etc., without air-breathing
The case where being remained in operation with no load condition.If operated with no load condition, suction pressure and ejection pressure decline.Especially
In 2 grades of type oilless (oil free) compressors, the decline of suction pressure and ejection pressure in the 1st grade of compressor main body is not sent out with same degree
It is raw, it sprays pressure ratio suction pressure and quickly declines.This is because from the 1st grade of compressor main body spray gas further by
2nd grade of compressor main body air-breathing.If it is considered that the compression of the 1st grade of compressor main body removed pressure is sprayed with suction pressure
Than, then based on suction pressure and spray pressure decrease speed difference, the compression ratio after no-load running starts temporarily on
It rises.If compression ratio rises, as the relational expression as thermodynamic (al) Poisson defines, the 1st grade of compressor main body will spray
Temperature is risen with the temperature that inlet temperature is removed than also out.That is, after no-load running starts, in the 1st grade of compressor main body
The temperature of gas temporarily rise.Such as in the case where 2 grades of type oil free screw compressors, it is possible to because the temperature rises,
The helical rotor of yin-yang a pair of the 1st grade of compressor main body is thermally expanded and is contacted, and cannot be run well.
Summary of the invention
Embodiments of the present invention are made in such a case, and the purpose is to inhibit nothing in oilless (oil free) compressor
Load running start after the 1st grade of compressor main body in the temperature of gas rise, maintain normal operating.
The oilless (oil free) compressor of embodiment for the present invention has: the 1st grade of compressor main body without oil feeding type, by gas
Body compression；The 2nd grade of compressor main body without oil feeding type is connected to aforementioned 1st grade of compression owner in the flow path of These gases
The downstream of body；Inlet valve is connected to the upstream of aforementioned 1st grade of compressor main body in the flow path of These gases；Recycle circuit,
Its in the flow path of These gases, by between aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body point with it is aforementioned
Point between inlet valve and aforementioned 1st grade of compressor main body connects in such a way that These gases are flowable；And separator valve,
The flow path of These gases in aforementioned recycle circuit can be cut off and be arranged, with the closing motion of aforementioned inlet valve synchronously into
Row opening action.
It, can when by suction valve closure and by being cut off to the supply of the gas of the 1st grade of compressor main body according to the program
Point of the gas between the 1st grade of compressor main body and the 2nd grade of compressor main body is taken by recycle circuit in synchronous mode
Out, it is sent back to the point between inlet valve and the 1st grade of compressor main body.That is, even if make inlet valve carry out closing motion and become
It, also can be immediately from recycle circuit to the 1st grade of compressor main body supply gas in the case where no-load running state.Therefore, exist
In oilless (oil free) compressor, be able to suppress the 1st grade of compressor main body will spray the temporary of compression ratio that pressure is removed with suction pressure
The rising of when property.Thus, no-load running start after the 1st grade of compressor main body in gas temperature rise be suppressed, energy
Enough maintain the normal operating of the 1st grade of compressor main body.Furthermore it is possible to will be by the 1st grade of compressor main body pressure via recycle circuit
Gas after contracting is sent back to the 1st grade of compressor main body.Therefore, in the 1st grade of compressor main body, by the sky by compression and after boosting
Gas recompression, so amount of boost can be reduced.
Aforementioned oilless (oil free) compressor can also be also equipped with recycle stream cooling end, be arranged in aforementioned recycle circuit, and being used to will
These gases in aforementioned recycle circuit are cooling.
According to the program, the temperature of the gas in recycle circuit can be made to decline by recycle stream cooling end.In compressor
In, it is lower from the temperature of the viewpoint of compression efficiency, preferably gas, by making from recycle circuit to the 1st grade of compressor main body
The temperature of the gas of supply declines, and the temperature for being able to suppress the gas sprayed from the 1st grade of compressor main body rises.In particular,
The gas phase flowed in recycle circuit than in usual operating condition from the 1st grade of compressor main body spray gas be a small amount of.
Thus, recycle stream cooling end and the gas-cooled cooling structure that will be sprayed from the 1st grade of compressor main body in usual operating condition
It makes and compares and can minimize.
Aforementioned oilless (oil free) compressor can also be also equipped with water removal portion, and the aforementioned recycle stream being arranged in aforementioned recycle circuit is cold
But the downstream in portion, for removing moisture from the These gases in aforementioned recycle circuit.
According to the program, the gas that the state of moisture can will be eliminated from water removal portion is supplied to the 1st grade of compressor main body,
It can prevent from being supplied to moisture in the 1st grade of compressor main body and adverse effect occurring.In particular, being provided in the circulation line
In the case where recycle stream cooling end, there is the case where gas generates moisture and being cooled down by recycle stream cooling end.Thus, by
Water removal portion is arranged in the downstream of recycle stream cooling end, can remove the moisture generated in recycle stream cooling end water removal portion.
Aforementioned oilless (oil free) compressor can also be also equipped with for by aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor
The mainstream cooling end of These gases cooling between main body.
According to the program, the temperature for the gas that can make to supply to the 2nd grade of compressor main body by mainstream cooling end declines,
It can be improved the compression efficiency of the 2nd grade of compressor main body.
In aforementioned oilless (oil free) compressor, aforementioned inlet valve and aforementioned separator valve can also be integrally formed, so that aforementioned
Closing motion is with aforementioned opening action mechanical structurally synchronous.
According to the program, by the way that inlet valve and separator valve to be integrally formed, part number of packages can be reduced and keep structure simple
Dan Hua.In turn, due to by one mechanical construction and closing motion is synchronous with opening action, so can prevent from making
The time difference of the closing motion and opening action that may occur in the case that two seperated valves are synchronous can reliably make it same
Step.
Aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body can also be respectively provided with the spiral of yin-yang a pair
Rotor.
According to the program, the temperature for being able to suppress the gas sprayed from the 1st grade of compressor main body as described above rises, institute
With being suppressed because being contacted caused by thermal expansion for yin-yang a pair of helical rotor.Thus, it is possible to maintain normally to operate, so as above
It is effective for stating scheme and application of the invention is set as oil free screw compressor like that.
The method of operation of the oilless (oil free) compressor of embodiment for the present invention, the oilless (oil free) compressor have: without fuel feeding
1st grade of compressor main body of formula, by gas compression；2nd grade of compressor main body, before being connected in the flow path of These gases
State the downstream of the 1st grade of compressor main body；Inlet valve is used to adjust by the These gases of aforementioned 1st grade of compressor main body air-breathing
Amount；Recycle circuit, by between aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body point and aforementioned sucking
Point between valve and aforementioned 1st grade of compressor main body connects in such a way that gas is flowable；And separator valve, can will before
It states the flow path cutting of the These gases in recycle circuit and is arranged；Make the closing motion of aforementioned inlet valve and beating for aforementioned separator valve
It starts and synchronizes.
It according to this method, is acted and keeping inlet valve synchronous with separator valve, even if making inlet valve carry out closing motion
And in the case where becoming no-load running state, it also can be immediately from recycle circuit to the 1st grade of compressor main body supply gas.Cause
This is able to suppress the compression ratio removed pressure is sprayed with suction pressure of the 1st grade of compressor main body in oilless (oil free) compressor
Temporary rising, be able to maintain that normal operating.Furthermore it is possible to prevent the refluence in recycle circuit.Here, it is so-called fall
Stream refers between inlet valve and the 1st grade of compressor main body to the 1st grade of compressor main body and the 2nd grade of compressor main body, gas
Body is flowed in a manner of bypassing the 1st grade of compressor main body.
Embodiment according to the present invention has recycle circuit and can will be in recycle circuit in oilless (oil free) compressor
Gas flow path cutting and be arranged and synchronous with the closing motion of inlet valve and carry out the separator valve of opening action, so can
The temperature of the 1st grade of compressor main body after inhibiting no-load running to start rises, and maintains normal operating.
Detailed description of the invention
Fig. 1 is the schematic structural diagram of the oilless (oil free) compressor of the 1st embodiment for the present invention.
Fig. 2 is the schematic structural diagram of the variation of the oilless (oil free) compressor of Fig. 1.
The schematic sectional view of switching valve when Fig. 3 A is usual operating condition.
The schematic sectional view of switching valve when Fig. 3 B is no-load running state.
Fig. 4 is the schematic structural diagram of the oilless (oil free) compressor of the 2nd embodiment for the present invention.
Fig. 5 is the schematic structural diagram of the oilless (oil free) compressor of the 3rd embodiment for the present invention.
Fig. 6 is the schematic structural diagram of the oilless (oil free) compressor of the 4th embodiment for the present invention.
Specific embodiment
Hereinafter, being described with reference to embodiments of the present invention by taking oil free screw compressor as an example.
(the 1st embodiment)
As shown in Figure 1, the oil free screw compressor 1(of present embodiment is hereinafter, there is the case where simply referred to as compressor 1) have sucking
Valve 2, the 1st grade of compressor main body 4 and the 2nd grade of compressor main body 6.The compressor 1 of present embodiment will be as an example of gas
It compresses to air event, is sprayed to supply target (not shown).
1st grade of compressor main body 4 is via being folded with the piping 8a of inlet valve 2 for air from air entry 4a air-breathing.From air-breathing
The air of mouth 4a air-breathing is by the compression (not shown) of the helical rotor of yin-yang a pair of the inside of the 1st grade of compressor main body 4.It is compressing
Afterwards, the 1st grade of compressor main body 4 sprays compressed air from ejiction opening 4b.The compressed air of ejection is via being folded with cooling during rolling
The piping 8b of device 10 and trap 12 is by the 2nd grade of 6 force feed of compressor main body.Intercooler 10 is equivalent to the master in the present invention
Flow cooling end.
2nd grade of compressor main body 6 is via piping 8b from air entry 6a by air suction.From the air quilt of air entry 6a air-breathing
The compression (not shown) of yin-yang a pair of helical rotor of the inside of 2nd grade of compressor main body 6.Upon compression, the 2nd grade of compressor main body
6 spray compressed air from ejiction opening 6b.The compressed air of ejection is via being folded with matching for aftercooler 14 and check-valves 16
Pipe 8c is by 18 force feed of receiving tank.
Compressed air in receiving tank 18 is supplied via the piping 8d for being folded with ejection valve 20 to supply target (not shown)
It gives.Automatically supply when needing of target when having, by ejection valve 20 open and by compressed air to supply target supply, when there is no to need
Ejection valve 20 is closed when wanting.
The inlet valve 2 being folded in piping 8a is, for example, flow rate regulating valve, controls aperture by aftermentioned control device 22.Generation
It, inlet valve 2 can also only have the function of allowing or cutting off the air-breathing of air.By the way that inlet valve 2 is switched, compressor 1
Operating condition is switched.Specifically, when inlet valve 2 is opened become usual operating condition, when inlet valve 2 is closed at
For no-load running state.
The intercooler 10 in piping 8b is folded in make to rise because of the heat of compression of the 1st grade of compressor main body 4
The temperature of compressed air declines and is arranged.Within the compressor, from the viewpoint of compression efficiency, the temperature of the air as gas is preferred
Be it is lower, by declining the temperature of the air supplied to the 2nd grade of compressor main body 6 from intercooler 10, can be improved
The compression efficiency of 2nd grade of compressor main body 6.In addition, trap 12 is in order to will be by intercooler 10 cools down and condenses compression
Moisture in air removes and is arranged.The form of intercooler 10 is not specially limited, such as is also possible in piping 8b
The heat exchanger of the air-cooled type of heat exchange between interior compressed air and ambient atmos.The trap 12 of present embodiment has dehumidifying
Filter 12a and water tank 12b.Trap 12 removes the moisture for being piped the compressed air in 8b dehumidifying filter 12a, will
The moisture of removing is recycled to water tank 12b.But the form of trap 12 is also not particularly limited, and is also possible to have water removal
The arbitrary form of function.
The aftercooler 14 in piping 8c is folded in order to make to rise because of the heat of compression in the 2nd grade of compressor main body 6
Compressed air temperature decline and be arranged.The form of aftercooler 14 is not specially limited, same with intercooler 10
Sample, such as it is also possible to heat exchanger.In addition, it is same as intercooler 10, can also trap be set downstream.
In addition, in the downstream of check-valves 16, being provided with the pressure for measuring the compressed air in piping 8c in piping 8c
The pressure sensor 24 of power.The pressure value measured from pressure sensor 24 is exported to control device 22.
With the receiving tank 18 that connect of piping 8c be for will to supply target supply (not shown) compressed air temporarily
The component of accumulation, the e.g. tank of steel.In addition, pressure sensor 24 may not be setting in piping 8c, but it is arranged
In receiving tank 18, measurement accumulates in the pressure of the compressed air in receiving tank 18.
In addition, in the present embodiment, being provided with piping 8e, the off-take point P1 in the downstream of the trap 12 of 8b will be piped
It connect with piping 8a and the junction of two streams P2 for being piped 8e so that gas can flow.In piping 8e, it is provided with for allowing or cutting
The separator valve 26 of the flow path of compressed air in disconnected piping 8e.Piping 8e is equivalent to the recycle circuit in the present invention.
Control device 22 is by the hardware such as timer and the software building being installed therein.Control device 22 is based on from pressure
The pressure value that sensor 24 receives, at least control inlet valve 2 and separator valve 26.Specifically, being connect from pressure sensor 24
The pressure value received is sufficiently high, in the case where substantially ensured compressed air in receiving tank 18, and inlet valve 2 is throttled and is cut
It is changed to no-load running state, the manufacture of compressed air is standby.In turn, in the same of the switching to the no-load running state
When, separator valve 26 is opened, the circulation for the compressed air being piped in 8e is allowed.When being returned to usual operating condition, by inlet valve 2
It opens, while separator valve 26 being closed.That is, inlet valve 2 and separator valve 26 are synchronously carried out on-off action.About inlet valve 2 and
The synchronization of separator valve 26, more particularly, in the case where being switched to no-load running state, preferably in inlet valve 2
Throttling opens separator valve 26 while completion.In addition, preferably separating in the case where being switched to usual operating condition
The closing of valve 26 starts to open inlet valve 2 while completion.The state that thereby, it is possible to avoid the valve 2,26 of the two from being opened,
It can prevent aftermentioned refluence.
Oil free screw compressor 1 according to the present embodiment, can by piping 8e by compressed air from the 1st grade of compression owner
Off-take point P1 between body 4 and the 2nd grade of compressor main body 6 takes out, the interflow between inlet valve 2 and the 1st grade of compressor main body 4
Point P2 is sent back to.Therefore, in the case where inlet valve 2 throttling and become no-load running state, also via piping 8e to the 1st grade
Compressor main body 4 supplies air, so the pressure that will spray of the 1st grade of compressor main body 4 is inhibited to be removed with suction pressure
The temporary rising of compression ratio.Thus, in oil free screw compressor 1, no-load running start after the 1st grade of compression owner
The temperature of air in body 4, which rises, to be suppressed, and is able to maintain that normal operating.Furthermore it is possible to inhibit the 1st grade of compressor main body 4
Yin-yang a pair of helical rotor because thermal expansion caused by contact.Furthermore it is possible to will be by the 1st grade of compressor main body via piping 8e
4 compressed air are sent back in the case where not deflating to outside to the 1st grade of compressor main body 4.Therefore, in the 1st grade of compressor
In main body 4, become the case where recompressing the air by compression and after boosting, so amount of boost can be reduced.
In addition, according to the present embodiment, keeping inlet valve 2 synchronous with separator valve 26 and acting.Therefore, piping 8e can be prevented
In refluence.Here, so-called refluence refers between inlet valve 2 and the 1st grade of compressor main body 4 to the 1st grade of compressor main body
Between 4 and the 2nd grades of compressor main bodies 6, gas flows in a manner of bypassing the 1st grade of compressor main body 4.
(variation)
As shown in Fig. 2, as modified embodiment of the present embodiment, can also be by inlet valve 2(referring to Fig.1) and separator valve 26(reference
It is Fig. 1) integrated, it is made into 1 switching valve 50.In this variation, switching valve 50 is set to piping 8a and is piped the junction of two streams of 8e.
As shown in Fig. 3 A, Fig. 3 B, the shape of switching valve 50 delimited by substantially cylindric shell 52.In shell 52, if
It is equipped with and the region in shell 52 is divided into the 1st suction chamber 54, the 2nd suction chamber 56 and 2 partition walls 60,61 of piston chamber 58.?
On shell 52, it is provided with by the 1st introducing port 52a that air is imported to the 1st suction chamber 54, by air and is exported from the 1st suction chamber 54
The 1st export mouth 52b, led from the 2nd suction chamber 56 by the 2nd introducing port 52c that air is imported to the 2nd suction chamber 56 and by air
The 2nd export mouth 52d out.1st introducing port 52a is connected to piping 8a.2nd introducing port 52c, which is connected to branch out from piping 8e, to be matched
The off-take point P1 of pipe 8b.1st export mouth 52b and the 2nd export mouth 52d is connected to piping 8a and is piped the junction of two streams P2 at the interflow 8e.
In the piston chamber 58 in shell 52, piston 62, quilt are configured in a manner of contacting by the inner wall border with shell 52
Piston 62 is divided into the 1st piston space 58a and the 2nd piston space 58b.Piston 62 can slide in piston chamber 58, with work
The size increase and decrease of the sliding of plug 62, the 1st piston space 58a and the 2nd piston space 58b.On shell 52, be provided with by air to
1st supply mouth 52e of the 1st piston space 58a supply and the 2nd supply mouth 52f for supplying air to the 2nd piston space 58b.It is logical
It crosses and is discharged from the one party of the 1st supply mouth 52e and the 2nd supply mouth 52f supply compressed air, from another party by air, make the 1st to live
The air filled in space 58a and the 2nd piston space 58b generates pressure difference, and piston 62 can be made mobile.
Connecting rod 64 is installed on piston 62.Partition wall 60,61 is penetrated through and extends to the 1st suction chamber 54 by connecting rod 64
In interior and the 2nd suction chamber 56.At the both ends of connecting rod 64, being installed with can be by the disk-shaped of the 1st introducing port 52a size blocked
The 1st valve body 66 and can by the 2nd introducing port 52c block size disk-shaped 2nd valve body 68.That is, the 1st valve body 66 and
2nd valve body 68 is moved together with piston 62, can block respectively the 1st introducing port 52a and the 2nd introducing port 52c.
Fig. 3 A indicates usual operating condition.In this state, air is sucked from the 1st introducing port 52a, via the 1st sucking
Room 54 is gone out from the 1st export mouth 52b to the 1st grade of 4 side spray of compressor main body.In order to realize usual operating condition, from the 1st supply
Mouth 52e supplies compressed air into the 1st piston space 58a, keeps piston 62 mobile towards the 2nd suction chamber 56.With piston 62
Mobile, the 1st valve body 66 and the 2nd valve body 68 connecting by connecting rod 64 with piston 62 are also mobile to identical direction, and the 1st imports
Mouth 52a is opened, and the 2nd introducing port 52c is blocked by the 2nd valve body 68.
Fig. 3 B indicates no-load running state.In this state, the compressed air quilt sprayed from the 1st grade of compressor main body 4
It sucks from the 2nd introducing port 52c, via the 2nd suction chamber 56, is gone out from the 2nd export mouth 52d to junction of two streams P2 side spray.In order to realize
No-load running state supplies compressed air into the 2nd piston space 58b from the 2nd supply mouth 52f, inhales piston 62 towards the 1st
It enters the room 54 mobile.With the movement of piston 62, the 1st valve body 66 and the 2nd valve body 68 being connect by connecting rod 64 with piston 62
Mobile to identical direction, the 1st introducing port 52a is blocked by the 2nd valve body 68, and the 2nd introducing port 52c is opened.
The switching of these states controlled device 22(as described above is referring to Fig. 2) control, specifically, control device 22
Switch from the 1st supply mouth 52e and the 2nd supply mouth 52f which to piston chamber 58 supply compressed air.For being supplied to piston chamber 58
Piping to compressed air is though it is not illustrated, for example from piping 8d branch and can also be connected to the 1st supply mouth 52e and the
2 supply mouth 52f.
In addition, as switching valve 50 form and its an example is illustrated in Fig. 3 A, Fig. 3 B, but the form of switching valve 50 is simultaneously
Be not limited to this, such as solenoid valve also can be used etc., it is also possible to any other form.But using two independences
Valve in the case where, have the feelings that time difference when switching usual operating condition and no-load running state occurs in two valves
Condition.It is therefore preferable that switching their shape by using the switching valve of a mechanical construction as this variation
State, or switched using the valve of mechanical construction as a triple valve.
(the 2nd embodiment)
Fig. 4 indicates the oil free screw compressor 1 of the 2nd embodiment.In the present embodiment, other than the position of off-take point P1 with the
1 embodiment is substantially the same.Thus, identical appended drawing reference is assigned to constituent element identical with the 1st embodiment and is saved
Slightly illustrate.
In the present embodiment, in piping 8b, the upstream of intercooler 10 is arranged in off-take point P1.That is, will be by the 1st
It is compressed after the compression of grade compressor main body 4 and from the compressed air before cooling of intercooler 10 via piping 8e to the 1st grade
Owner's body 4 is sent back to.Since the upstream of intercooler 10 is arranged in off-take point P1, thus in piping 8e the air that flows not by
It is cooling.Thus, it in the present embodiment, is not condensed via the moisture of the air of piping 8b, 8e circulation, in the 1st grade of compression owner
The adverse effect of moisture will not occur in body 4, so trap 12 is omitted compared with the 1st embodiment.But due to right
The air that the 2nd grade of supply of compressor main body 6 is cooled down in piping 8b by intercooler 10, so can also be in intercooler
Trap is arranged in 10 downstream.
As in the present embodiment, it also may be at via piping 8e to the compressed air that the 1st grade of compressor main body 4 is sent back to
Before cooling by intercooler 10, thus it enables that the amount of the compressed air cooled down by intercooler 10 is reduced.That is, can
The processing capacity for reducing intercooler 10 can be such that intercooler 10 minimizes.
(the 3rd embodiment)
Fig. 5 indicates the oil free screw compressor 1 of the 3rd embodiment.In the present embodiment, in addition to being additionally provided with intercooler
It is substantially the same with the 2nd embodiment other than 11.Thus, constituent element identical with the 2nd embodiment is assigned identical
Appended drawing reference and omit the description.
In the present embodiment, 2 intercoolers 10,11 are provided with.The intercooler 10 of one side is in piping 8b
The downstream of off-take point P1 is set.The upstream of separator valve 26 is arranged in the intercooler 11 of another party in piping 8e.It is intermediate
Cooler 10 is equivalent to the mainstream cooling end in the present invention.Intercooler 11 is equivalent to the recycle stream cooling end in the present invention.
According to the present embodiment, by intercooler 11, the temperature decline for the air being piped in 8e, Neng Goufang can be made
The only rising of the ejection temperature of the 1st grade of compressor main body 4 under no-load running state.In particular, flowed in piping 8e
Air is a small amount of with the gas phase ratio flowed in piping 8b in usual operating condition.Thus, it is possible to make intercooler
11 than minimizing the gas-cooled intercooler 10 flowed in piping 8b in usual operating condition.
(the 4th embodiment)
Fig. 6 indicates the oil free screw compressor 1 of the 4th embodiment.In the present embodiment, in addition to the position of trap 13 with
Outside, substantially the same with the 1st embodiment.Thus, identical attached drawing is assigned for constituent element identical with the 1st embodiment
It marks and omits the description.
In the present embodiment, different from the 1st embodiment, trap (water removal portion) 13 is arranged in piping 8e to be separated
The upstream of valve 26.The form of trap 13 and the embodiment of front are likewise, having dehumidifying filter 13a and water tank
13b。
It according to the present embodiment, can be by the air of the state after removing moisture from trap 13 to the 1st grade of compression owner
Body 4 supplies, and can prevent from being supplied to moisture in the 1st grade of compressor main body 4 and there is a situation where adverse effects.In particular,
In the case where being provided with intercooler 11 in piping 8e, there is air to generate the feelings of moisture and being cooled down by intercooler 11
Condition.Thus, by the way that trap 13, the moisture that can will be generated in intercooler 11 is arranged in the downstream of intercooler 11
It is removed with trap 12.
According to the above, specific embodiment and its variation of the invention are illustrated, but the present invention and unlimited
Due to above-mentioned form, it can variedly change and implement within the scope of the invention.For example, it is also possible to by appropriately combined
The form of the content of each embodiment is as one embodiment of the present invention.
Description of symbols
1 oil free screw compressor
2 inlet valves
4 the 1st grades of compressor main bodies
4a air entry
4b ejiction opening
6 the 2nd grades of compressor main bodies
6a air entry
6b ejiction opening
8a~8e piping
10 intercoolers (mainstream cooling end)
11 intercoolers (recycle stream cooling end)
12 traps
12a dehumidifying filter
12b water tank
13 traps (water removal portion)
13a dehumidifying filter
13b water tank
14 aftercoolers
16 check-valves
18 receiving tanks
20 ejection valves
22 control devices
24 pressure sensors
26 separator valves
50 switching valves
52 shells
The 1st introducing port of 52a
The 1st export mouth of 52b
The 2nd introducing port of 52c
The 2nd export mouth of 52d
The 1st supply mouth of 52e
The 2nd supply mouth of 52f
54 the 1st suction chambers
56 the 2nd suction chambers
58 piston chamber
The 1st piston space of 58a
The 2nd piston space of 58b
60,61 partition wall
62 pistons
64 connecting rods
66 the 1st valve bodies
68 the 2nd valve bodies.
Claims (7)
1. a kind of oilless (oil free) compressor, which is characterized in that
Have:
The 1st grade of compressor main body without oil feeding type, by gas compression；
The 2nd grade of compressor main body without oil feeding type is connected to aforementioned 1st grade of compressor main body in the flow path of These gases
Downstream；
Inlet valve is connected to the upstream of aforementioned 1st grade of compressor main body in the flow path of These gases；
Recycle circuit, in the flow path of These gases, by aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body
Between point and aforementioned inlet valve and aforementioned 1st grade of compressor main body between point connect in such a way that These gases are flowable
It connects；And
The flow path of These gases in aforementioned recycle circuit can be cut off and is arranged, the pass with aforementioned inlet valve by separator valve
It closes movement and is synchronously carried out opening action.
2. oilless (oil free) compressor as described in claim 1, which is characterized in that
It is also equipped with recycle stream cooling end, is arranged in aforementioned recycle circuit, for by the These gases in aforementioned recycle circuit
It is cooling.
3. oilless (oil free) compressor as claimed in claim 2, which is characterized in that
It is also equipped with water removal portion, the downstream of the aforementioned recycle stream cooling end in aforementioned recycle circuit is set, for following from aforementioned
These gases in loop wire road remove moisture.
4. oilless (oil free) compressor as claimed in claim 1 or 2, which is characterized in that
It is also equipped with for that the These gases between aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body are cooling
Mainstream cooling end.
5. oilless (oil free) compressor as claimed in claim 1 or 2, which is characterized in that
Aforementioned inlet valve and aforementioned separator valve are integrally formed, so that aforementioned closing motion and aforementioned opening action are in mechanicalness
Structurally synchronize.
6. oilless (oil free) compressor as claimed in claim 1 or 2, which is characterized in that
Aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body are respectively provided with the helical rotor of yin-yang a pair.
7. a kind of method of operation of oilless (oil free) compressor, which is characterized in that
The oilless (oil free) compressor has:
The 1st grade of compressor main body without oil feeding type, by gas compression；
The 2nd grade of compressor main body without oil feeding type is connected to aforementioned 1st grade of compressor main body in the flow path of These gases
Downstream；
Inlet valve is used to adjust the amount of the These gases by aforementioned 1st grade of compressor main body air-breathing；
Recycle circuit, by the point and aforementioned inlet valve between aforementioned 1st grade of compressor main body and aforementioned 2nd grade of compressor main body
Point between aforementioned 1st grade of compressor main body connects in such a way that These gases are flowable；And
The flow path of These gases in aforementioned recycle circuit can be cut off and is arranged by separator valve；
Keep the closing motion of aforementioned inlet valve synchronous with the opening action of aforementioned separator valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-230311 | 2016-11-28 | ||
| JP2016230311A JP6705736B2 (en) | 2016-11-28 | 2016-11-28 | Oil-free compressor and operating method thereof |
| PCT/JP2017/042043 WO2018097190A1 (en) | 2016-11-28 | 2017-11-22 | Oil-free compressor and method of operating same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109790836A true CN109790836A (en) | 2019-05-21 |
| CN109790836B CN109790836B (en) | 2020-05-19 |
Family
ID=62196271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780060240.2A Active CN109790836B (en) | 2016-11-28 | 2017-11-22 | Oil-free compressor and method of operating the same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6705736B2 (en) |
| CN (1) | CN109790836B (en) |
| TW (1) | TWI661128B (en) |
| WO (1) | WO2018097190A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306721A (en) * | 2021-05-06 | 2022-11-08 | 神钢压缩机株式会社 | Power generation device and power generation method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7160733B2 (en) * | 2019-03-20 | 2022-10-25 | コベルコ・コンプレッサ株式会社 | intake control valve |
| JP7214613B2 (en) * | 2019-12-03 | 2023-01-30 | 株式会社神戸製鋼所 | COMPRESSION SYSTEM CONTROL METHOD, COMPRESSION SYSTEM AND HYDROGEN STATION |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61184899U (en) * | 1985-05-11 | 1986-11-18 | ||
| US20020051709A1 (en) * | 2000-10-31 | 2002-05-02 | Hitoshi Nishimura | Oil free screw compressor operating at variable speeds and control method therefor |
| JP2006329001A (en) * | 2005-05-24 | 2006-12-07 | Calsonic Compressor Inc | Gas compressor |
| JP2007170216A (en) * | 2005-12-20 | 2007-07-05 | Hitachi Industrial Equipment Systems Co Ltd | Air compressor |
| CN102691578A (en) * | 2011-03-18 | 2012-09-26 | 通用电气公司 | System and method for controlling fuel supply associated with turbomachine |
| CN102706022A (en) * | 2010-10-13 | 2012-10-03 | 株式会社神户制钢所 | Refrigerator |
-
2016
- 2016-11-28 JP JP2016230311A patent/JP6705736B2/en active Active
-
2017
- 2017-11-22 WO PCT/JP2017/042043 patent/WO2018097190A1/en active Application Filing
- 2017-11-22 CN CN201780060240.2A patent/CN109790836B/en active Active
- 2017-11-27 TW TW106141095A patent/TWI661128B/en active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61184899U (en) * | 1985-05-11 | 1986-11-18 | ||
| US20020051709A1 (en) * | 2000-10-31 | 2002-05-02 | Hitoshi Nishimura | Oil free screw compressor operating at variable speeds and control method therefor |
| JP2006329001A (en) * | 2005-05-24 | 2006-12-07 | Calsonic Compressor Inc | Gas compressor |
| JP2007170216A (en) * | 2005-12-20 | 2007-07-05 | Hitachi Industrial Equipment Systems Co Ltd | Air compressor |
| CN102706022A (en) * | 2010-10-13 | 2012-10-03 | 株式会社神户制钢所 | Refrigerator |
| CN102691578A (en) * | 2011-03-18 | 2012-09-26 | 通用电气公司 | System and method for controlling fuel supply associated with turbomachine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306721A (en) * | 2021-05-06 | 2022-11-08 | 神钢压缩机株式会社 | Power generation device and power generation method |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201825786A (en) | 2018-07-16 |
| CN109790836B (en) | 2020-05-19 |
| TWI661128B (en) | 2019-06-01 |
| WO2018097190A1 (en) | 2018-05-31 |
| JP6705736B2 (en) | 2020-06-03 |
| JP2018087503A (en) | 2018-06-07 |
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Effective date of registration: 20220214 Address after: Tokyo, Japan Patentee after: Shengang Compressor Co.,Ltd. Address before: Kobe City, Hyogo Prefecture, Japan Patentee before: Kobe Steel, Ltd. |