CN101225821B - Fluid machine connected to a drive source via a magnetic coupling - Google Patents
Fluid machine connected to a drive source via a magnetic coupling Download PDFInfo
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- CN101225821B CN101225821B CN2007101800644A CN200710180064A CN101225821B CN 101225821 B CN101225821 B CN 101225821B CN 2007101800644 A CN2007101800644 A CN 2007101800644A CN 200710180064 A CN200710180064 A CN 200710180064A CN 101225821 B CN101225821 B CN 101225821B
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- external rotor
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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
- F04C29/04—Heating; Cooling; Heat insulation
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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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
- F04C18/0223—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving with symmetrical double wraps
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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
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C29/0064—Magnetic couplings
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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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The present invention aims to propose a fluid machine in which a magnetic coupling includes an outer rotor 32 to the cylinder-bottom part of which a drive shaft of the drive component is connected, outer rotor side magnets 33 placed on an inner periphery of the outer rotor, an inner rotor 23 fitted to a drive shaft of the fluid machine, inside the outer rotor, inner rotor side magnets 21 placed on an outer periphery of the inner rotor, whereby attraction workings and repulsion workings between the outer rotor side magnets and the inner rotor side magnets transmit torques of the drive component to the fluid machine, and a sealing assembly 20 a partition part of which is placed between the inner rotor 23 and the outer rotor 32 and surrounds a drive shaft of the fluid machine so as to secure gas-tightness, the shaft including the inner rotor 23 and the inner rotor side magnets 21 ; further an air ventilation device for ventilating a space inside the outer rotor by means of inducing and/or discharging ambient air is provided into the outer rotor 32 of the magnetic coupling so as to cool the sealing assembly 20 and the outer rotor side magnets 33.
Description
Technical field
The present invention relates to a kind of fluid machinery that is connected to driving source through magnetic coupling (magnetic coupling); Relate in particular to the machinery of the sort of gas/liquid leakage proof structure { closo (closedtype) structure } except that import/exhaust port is arranged; They comprise pump and compressor; Thisly be provided with non-contact type bearing and need not fuel feeding and be a kind of power transmission mechanism that need not be mechanically connected to driving source by the machinery that driving source drives, therefore can handle toxic gas and/or gas and the liquid relevant with nuclear industry through magnetic coupling.
Background technique
In order to prevent mechanical part wearing and tearing and because the environmental pollution that the operating radiation of nuclear equipment causes; The machinery like compressor and vacuum pump and so on that requirement is used for the vacuum vessel of nuclear equipment has high working life and reliability, especially has high radiation proof and/or anti-wear property.In addition; During as the machine operation of the parts of the top equipment of mentioning; Not only requirement can prevent by forming radioactive pollution as other machinery that is connected to this some equipments unit or a certain parts mechanically; Also require to form the borderline region that this type machinery and external environment condition are isolated, cause not receive external environment influence.Therefore, in conjunction with said main points, must design and the machinery of external isolation and the machinery of cooling; In addition,, need take some preventive measures, prevent the trouble that possibly cause by lubricating structure, sealing configuration, bearing structure etc. to long-term running continuously for guaranteeing condition of high vacuum degree.
For as compressor and pump and so on be used for handling if those fluid machineries of the trouble that gas leak possibly caused by toxic gas with above said situation similar.For example; In the existing technology shown in claimant's of the present invention references 1 (JP:1999-44297); This type machine-building is become the closo machinery except that import/exhaust port; It without supply of lubricant, also adopts the magnetic coupling that need not be mechanically connected to driving source by adopting the non-contacting gas bearing.
In this references; An instance as fluid machinery shows a kind of dry type scroll vacuum pump that is binary vortices web-like (double lapped); Promptly; A kind of pump that comprises motion vortex part and fixed scroll, motion vortex part have plectane and roll up (scroll laps) along the axial direction configuration (set-up) of pump shaft in the helical vortex of the both side surface of this plate, and fixed scroll is embedded in the identical spirality vortex volume of motion vortex part along the Vertical direction towards said plate.
Combine the fluid mechanics shown in this references of Figure 4 and 5 explanation now.At first, Fig. 5 shows the working principle of the vacuum pump with helical vortex volume.Fixed scroll 11 has spiral wall shape blade { vortex volume (lap) }.In Fig. 5 A-5D, process with the spiral vortex roll-shape of fixed scroll basic identical through the shape that the spiral vortex of motion vortex part 13 is rolled up; Make the spiral vortex volume of motion vortex part 13 and the spiral vortex volume point symmetry of fixed scroll 11; Fixed scroll 11 can be matched with in the said motion vortex part, causes by crank mechanism to make motion vortex part rotation and move around the pump shaft line parallel.Roll up formation crescent shape closed space 60 (compression volumes) between the outer surface 13b at the vortex volume inner surface 11b of fixed scroll 11 and the vortex of motion vortex part 13; Scroll 11 and 13 relative movement can change the volume of compression volume, thereby make the suction side become vacuum.
In Fig. 5 A; When the vortex volume inner surface 11b of the vortex of motion vortex part 13 volume outer surface 13b and fixed scroll 11 forms seal space when accomplishing suction process, the gas that sucks via import 14 closed as among Fig. 5 A with in the compression chamber 60 shown in the zone of having a few.In addition; Shown in Fig. 5 B; When the crank angle of crank mechanism (not shown) advances 90 when spending; The vortex volume outer surface 13b of motion vortex part 13 begins to separate around its afterbody with the vortex volume inner surface 11b of fixed scroll 11, forms the open type clearance space 61 shown in Fig. 5 B, sucks gas from this space.In addition, continue compression process at 62 places, intermediate compression space, and finish, thereby beginning is via the discharge process of exhaust port 64 in central compression volume 63 place's compression processes.
Shown in Fig. 5 C; Crank angle 90 degree that readvance, the non-turnover of responsive movement scroll 13 (without revolution) track rotation, the more position of central authorities is shifted in said a bit zone 60; Its volume reduces gradually, and the pressurized gas of this chamber is via exhaust port 64 dischargings then.
Fig. 4 shows the cross-sectional profiles structure of binary vortices volume dry type scroll vacuum pump; Wherein, Motion vortex part 13 with a pair of spiral vortex volume is embedded in fixed scroll 11 and 12, and said a pair of spiral vortex volume vertically is installed on the both sides of the plectane of motion vortex part along pump shaft line direction.As shown in Figure 4, this vacuum pump comprises the pump housing 10 and driver part 30, and the pump housing 10 comprises scroll compressor main body 10a and black box 20 and 25. Black box 20,25 is connected on the fixed scroll 11,12 of supporting driving shaft 16 two end portions respectively airtightly.The pump housing 10 also comprises the inlet 17 that is compressed gas and 18 and magnet coupling (magnetic coupling) 50; Through said inlet; The gas that pressure is higher than compressor delivery pressure is imported black box 20 and 25 respectively, and magnet coupling is used for on-mechanical and contiguously rotational torque is delivered to live axle 16 from driver part 30.So, to isolate through magnet coupling 50 vacuum pumps and driver part 30 as the driving torque transmission member, the pollutant that sucks from the suction side can not leak into the surrounding environment side.
The apart section of black box 20 is have the bottom cylindrical, and it is placed in inboard, next-door neighbour's magnet 52 of external rotor 51.Be connected in internal rotor 58 driven magnet 21 on every side and move to the apart section that is close to black box 20.Driven magnet 21 is arranged to and can effectively repels and attract magnet 52.Like this, internal rotor 58 response external rotors 51 transfers rotation in week.
The fixed scroll 11 of scroll compressor main body 10a comprises the fixed scroll volume 11a perpendicular to the plectane of pump shaft line setting and spiral wall shape, and this vortex volume 11a is configured on first side surface of plectane along pump shaft line direction.Dome-shaped plate (circular, lid-shaped plate) is as the part of the shell of scroll compressor main body 10a, and first side surface of said plate is as the slidingsurface of motion vortex volume.On the other hand, fixed scroll 12 comprises the fixed scroll volume 12a perpendicular to the plectane of pump shaft line setting and spiral wall shape, and vortex volume 12a is configured on first side surface of plectane along pump shaft line direction.The dome-shaped plate is as the part of the shell of scroll compressor main body 10a, and first side surface of said plate is as the slidingsurface of motion vortex volume.In addition; Motion vortex part 13 comprises the motion vortex volume 13a perpendicular to the plectane of pump shaft line setting and spiral wall shape; Plectane is installed on the live axle 16 by the both sides bearings; Make that by means of the axis rotation of this plate of crank mechanism around axle, the side surface of plate is as the slidingsurface of fixed scroll volume, vortex volume 13a is configured on the side surface of plectane.
In motion vortex part 13, the spiral wall shape motion vortex volume 13a that is configured in along pump shaft line direction on the both side surface of circular discs plate (circular disk plate) part of motion vortex part 13 is embedded among the fixed scroll volume 11a and 12a of spiral wall shape.In addition, the end sections of spiral helicine fixed scroll volume contacts with two slidingsurfaces of the circular discs plate portion of motion vortex part 13, and the end sections of fixed scroll slides on the both side surface of circular discs plate portion.On the other hand, in fixed scroll 11 and 12, the end sections of the motion vortex of spiral wall shape volume 13a and fixed scroll 11 contact with two first surfaces of 12.The circular discs plate portion of motion vortex part 13 is installed on the live axle 16 with the mode that has eccentric distance between the axis of axle and the circular discs plate axis.Under the booster action of rotation preventive apparatus 57, motion vortex part 13 rotates around drive axis, and does not rotate around the motion vortex part axis.As top pointed out; Fixed scroll 11 and/or 12 forms a plurality of meniscate compression volumes with motion vortex part 13; In these spaces, simultaneously and carry out gas suction process, compression process and discharge process continuously via import 14, so; Gas flows through exit passageway 15a reposefully and flows to outlet 15, thereby plays vacuum pump.
As pointing out, fixed scroll 11 and 12 boths comprise circular discs plate portion or the plectane part as the part of the shell of scroll compressor main body 10a; Scroll 11 and 12 boths are configured to airtight through seal element 55 and cooperate with motion vortex part 13; On the other hand, through seal element 56, make fixed scroll 11 and black box 20 be configured to airtight; So fixed scroll 11 and 12 forms closed space therein and is used as the housing of air-locked structure.
In addition, compressed inert gas is compression N here
2(nitrogen) is blown into the closed space that is formed by motion vortex part 13 and fixed scroll 11 and 12 via pressurized gas inlet 17 and 18; Whereby, the pressure of inert gas is higher than the pressure of the final exhausting air of discharging via outlet 15,, is higher than the outlet pressure by the compressor that compresses the closed space acquisition that is formed by motion vortex part 13 and fixed scroll 11 and 12 that is; Like this, compressed gas can not enter the mouth via pressurized gas and 17 and 18 refluxes in closed space.
Be more in addition, support the live axle 16 in the pump housing by the oilless bearing (not shown) of being processed by self-lubricating metal, the gas that imports via pressurized gas inlet 17 and 18 plays lubricated media.In this manner, because oil-free lubrication, can expect does not have oil leakage, does not have lubricant mist to diffuse into the exhausting air outside, and the serviceability of bearing is improved, and the consumption of flight-line maintenance reduces; Therefore, pump not operation for a long time with shutting down.
Fixed scroll 12 is provided with the cooling fin 59 on the frame part that is in the dome-shaped plate that comprises fixed scroll 12, therefore can pass through the ambient air natural cooling.In addition; In the fixed scroll 11 and 12 that comprises plectane part a part of as the shell of scroll compressor main body 10a or circular discs plate portion, being mounted with circular cooling jacket 54a, 54b, 54c and 54d, is to make flow of cooling water by the cooling water circulating member (not shown) that comprises radiator (not shown) and cooling water circulating pump (not shown).So, can force cooling to them from the rear side of fixed scroll 11 and 12.
As stated, it is distolateral that the compressed inert gas that pressure is higher than the pressure of the final exhausting air of discharging from exhaust port 15 is directed to each of driving shaft bearing via pressurized gas inlet 17 and 18, and this inert gas is again via exhaust port 15 discharges.As a result, being compressed gas and can not entering the mouth and 17 and 18 reflux in the closed space via pressurized gas.And the vacuum pump and the outside isolate (except that the attachment portion like import 14, exhaust port 15, pressurized gas inlet 17 and 18 and so on) airtightly.In addition, with regard to regard to the magnet coupling 50 of the driving torque transmission member of on-mechanical contact, this pump does not need seal element.Like this, even sucked the radiocontamination material from the atomic power device side through import, pollutant can not leak into the surrounding environment side through pump yet.
Like this; Because nothing machinery contact performance as the magnet coupling 50 of driving torque transmission member; As as described in this references, can realize isolating as the vacuum pump of fluid machinery airtightly, this pump can not cause pollutant to leak laterally from the suction side.In addition, because pump has oilless bearing or the gas bearing of being processed by self-lubricating metal, pump can not shut down ground operation continuously for a long time.Moreover; Because pump is provided with the cooling fin 59 on the dome-shaped plate-frame part that is in fixed scroll 12; And in frame part, be provided with and be used to force the circular cooling jacket 54a, 54b, 54c and the 54d that cool off, can take sufficient preventive measure to prevent the possible heat harm that causes by the pressurized gas in the space between fixed scroll 11,12 and the motion vortex part 13.
Yet the gas that sucks from import 14 is compressed in chimeric fixed scroll and the space between the motion vortex part, produces considerable heat.So a part of heat passes to magnet coupling 50, when the long operational time of pump arrived to a certain degree, heat passed to magnet coupling 50 from driver part 30.However, the measure that is used to cool off magnet coupling 50 only is mounted in the rotation wing 53 on the outer surface of external rotor 51.There is not special measure to be used to cool off to place external rotor 51 inboard magnet 52 and coolant seal assembly 20.
On the one hand; The angle of the transmission of torque from the driver part to the internal rotor is with space between magnet 52 and the black box 20 and black box 20 with to be installed on that space between the driven magnet 21 on the outer surface of internal rotor 58 keeps be important within limits.If the temperature of black box 20 and/or magnet 52 raises, the space between black box 20 and the magnet 52 will change.The worst situation possibly make parts 20 and 52 both mutually touchings and damage magnet coupling 50.On the other hand, the space between black box 20 and the magnet 52 possibly enlarge, and makes the Magnetic flux density that arrives driven magnet weaken, and normal transmission of torque is damaged.
The angle of the rotation wing 53 from the outer surface that is installed on external rotor 51 tends to make these wings to have large scale, and this requires big space to be used for the rotation of the wing; This need design bigger magnet coupling 50, and whole fluid machinery will be bigger.
Summary of the invention
In view of said conventional situation; The present invention relates to fluid machinery like compressor and pump and so on; These mechanical energy are handled the problem that leaks and cause because of toxic gas; The object of the present invention is to provide a kind ofly to be coupling-connected to the airtight ground sealed type fluid machinery of driver part, wherein, under the prerequisite of the configuration space that does not increase magnet coupling, can effectively cool off magnet coupling through magnetic.
For solving said problem, the present invention provides a kind of and has driver part, is connected to the fluid machinery of driver part through magnetic coupling, and this fluid machinery is made up of the pump unit that comprises compressor, and fluid machinery is connected with driver part through magnet coupling; Said magnet coupling comprises: external rotor, the live axle of driver part are connected to the cylindrical bottom portion part of external rotor; Place the external rotor side magnet on the external rotor inner periphery; Be assemblied on the live axle of fluid machinery and be in the inboard internal rotor of external rotor; With the internal rotor side magnet that places on the internal rotor outer periphery, by means of the sucking action between external rotor side magnet and the internal rotor side magnet and repulsive interaction with the transmission of torque of driver part to fluid machinery; Wherein, fluid machinery is provided with the black box of the two end portions of a pair of sealing (encloses) fluid machinery live axle, makes that this fluid machinery is in air-locked sealing state except that having gas inlet, gas discharge outlet and pressurized gas inlet; In addition, the air-breather that the external rotor inner space is ventilated by the air of introducing and/or discharge surrounding environment is set in the external rotor of magnet coupling, so that the black box and the external rotor side magnet of cooling magnet coupling side.
Through the air-breather that the external rotor inner space is ventilated through the air of introducing and/or discharge surrounding environment is set in the external rotor of magnet coupling, can avoid because of cooling off insufficient magnet coupling that damages.That is to say that even heat that produces because of gas compression in the fluid machinery or the heat that comes from driver part are transmitted to magnet coupling, the ambient air that the black box of magnet coupling side and external rotor side magnet also can be introduced into and/or discharge cools off.As a result, can avoid reducing of space between the black box of external rotor side magnet and magnet coupling side, thereby can avoid Mechanical Contact possible between them.On the other hand, under the situation of space increase, also can avoid the transmission of torque fault that reduces to cause because of the magnetic flux density that arrives driven magnet.
In addition and since with air-breather be installed on external rotor originally on one's body, neither need increase the size of shaft coupling, do not need big wasted space yet.Therefore this device can be realized the compact design of fluid machinery.
Because blade is with respect to the tilt assembling and form ventilation gaps around the rotor surface wall outside of the sense of rotation of external rotor, so that this air-breather implements is very simple.
One embodiment of the present invention is; Air-breather is installed in the driver part side cylindrical bottom portion part of external rotor; Be installed in the cylindrical peripheral part of external rotor; Be installed in the cylindrical peripheral part of the external rotor between the external rotor side magnet that is coupled on the external rotor inner periphery, be installed in the cylindrical peripheral end of fluid machinery side of external rotor, or be installed in a plurality of positions in the said position.
Moreover; Because these air-breathers (blade/slit) are set at the fluid machinery side and across the driver part side of the belt-like zone of external rotor cylindrical peripheral part; At those positions; External rotor side magnet is positioned at the external rotor inboard, and each air that designs each blade/place, slit adjustably imports (inducing) and/or air discharge momentum (discharging momentum).Therefore, can effectively cool off the black box and the external rotor side magnet of magnet coupling side.
So far; As stated; When air-breather being installed in the external rotor of magnet coupling; Utilize this simple structure, the present invention can prevent that the fluid machinery that is connected to driver part through magnet coupling is damaged, and this damage is to be caused by the Mechanical Contact that reduces to cause because of space between the black box of external rotor side magnet and magnet coupling side between the magnet of the black box of magnet coupling side and external rotor side; Reducing of said space owing to the heat that produce and that be transmitted to magnet coupling of gas compression in the fluid machinery, or give the heat of magnet coupling owing to the also conduction that the driving by driver part causes.Opposite with said situation, also can design great space in advance to avoid aforesaid contact.In this case, the situation of the useless temperature rise of magnet coupling can be fully satisfied in these spaces; But have only the rare magnetic flux that is derived from magnet to arrive driven magnet and cause the transmission of torque fault.The present invention can prevent to receive through the fluid machinery that magnet coupling is connected to driver part the influence of this transmission of torque fault.
In addition and since with air-breather be installed on external rotor originally on one's body, the introducing of this device had not both required the size that increases magnet coupling, did not require that external rotor wasted space on every side is very big yet.Therefore, this device can be realized the compact design of fluid machinery.
Description of drawings
Describe the present invention in detail below with reference to preferred embodiments more of the present invention and accompanying drawing.In the accompanying drawing:
Fig. 1 shows the form structure of the binary vortices volume dry type scroll vacuum pump of the instance as the fluid machinery that is connected to driver part through magnet coupling of the present invention with cross-sectional view;
Fig. 2 is the amplification sectional view of magnet coupling shown in Figure 1;
The sectional view of Fig. 3 A, 3B, 3C, 3D, 3E and 3F shows as the structure in blade of the present invention, as to be installed on the ventilation plant in the magnet coupling external rotor and slit and this Unit Installation position; Wherein, Fig. 3 F is the sectional view that is installed on the air-breather position in the external rotor; The cross-sectional view of Fig. 3 A for dissecing along Fig. 3 F center line A-A ', the cross-sectional view of Fig. 3 B for dissecing, the cross-sectional view of Fig. 3 C for dissecing along Fig. 3 F center line C-C ' along Fig. 3 F center line B-B '; The cross-sectional view of Fig. 3 D for dissecing along Fig. 3 F center line D-D ', Fig. 3 E shows the air-breather that is installed on each position;
Fig. 4 shows the form structure of traditional binary vortices volume dry type scroll vacuum pump with cross-sectional view;
Fig. 5 A, 5B, 5C and 5D show in the vortex compress body of DRY SCROLL VACUUM PUMP and finish to the conversion of compression process state and the conversion from compression process to the discharge process state from suction process.
Embodiment
Hereinafter will be elaborated to the present invention with reference to the more shown embodiments of accompanying drawing.Obviously, only if specifically mention part specially, the size of the parts that scope of the present invention is not limited among these embodiments to be mentioned, material, shape, relative position etc.
Fig. 1 with the form of sectional view show of the present invention, as the form structure of the binary vortices volume dry type scroll vacuum pump of the instance of the fluid machinery that is connected to driver part through magnet coupling.Fig. 2 is the amplification sectional view of magnet coupling 31 shown in Figure 1; Fig. 3 with the form of sectional view show of the present invention, as the structure in the slit (blade) of the ventilation plant in the external rotor that is installed on magnet coupling 32.For fluid machinery of the present invention is described, combine the instance of Fig. 4 above explaining emphatically to the described binary vortices volume of references dry type scroll vacuum pump.Certainly, the present invention obviously can be applicable to other universal fluid machinery, and for example compressor, pump etc. are as long as these fluid machineries are to be connected with driving source through magnetic coupling.In the explanation below, use the same reference numerals to represent basically with Fig. 4 in relevant parts/part.In addition, for ease of understanding the present invention, here with following explanation in some explanation maybe with up to now the explanation of Fig. 4 is repeated mutually.
At first, the present invention is made simplified summary.According to the present invention, be in the fluid machinery of representative with the vacuum pump that combines Fig. 4 to make an explanation, in coupling element (coupling element) 51 (among Fig. 1 32), the inner space to introduce ventilation gaps to coupling element 51 ventilates with blade installation.{ following coupling element 51 (32) will be called external rotor 51 (32).Shown in Fig. 2 and 3; The sense of rotation of blade with respect to external rotor tilted to install; And rotatablely moving of response external rotor introduce the air of surrounding environment this space and the air of introducing discharged this space, and the result makes the magnet (external rotor side magnet) 52 (among Fig. 1 33) of the black box 20 and the magnet coupling of vacuum pump be able to cooling.
In air-breather, blade is installed in the external rotor 51 with respect to the sense of rotation of external rotor 51 (among Fig. 1 32) obliquely, so blade is introduced ambient air external rotor 51 (among Fig. 1 32) inner space and the air of introducing is discharged external rotor 51 (among Fig. 1 32); In the cylindrical bottom portion part of driver part 30 sides that are installed in external rotor 51 as the blade and/or the slit of ventilation plant; In the columniform peripheral part of external rotor 51; Be connected between the external rotor side magnet 52 on the inner periphery of external rotor 51 (among Fig. 1 33); In the cylindrical peripheral end of the vacuum pump side of external rotor 51, or in a plurality of positions at said position.
Preferably blade/slit (air-breather) is arranged at driver part 30 sides and both places of vacuum pump side (fluid machinery side) of the belt-like zone of the cylindrical peripheral part of crossing external rotor; Be in the external rotor inboard at these position external rotor side magnets 52 (among Fig. 1 33); Can each air importing and/or the air discharge momentum at each blade/place, slit be designed to and can regulate, make ventilating air not be stranded in the external rotor inboard.Like this, can be effectively the black box 20 of magnet coupling side and external rotor side magnet 52 (among Fig. 1 33) be cooled off.
So far, the fluid machinery that is connected to driver part through magnetic coupling of the present invention has been made general description.Below with reference to Fig. 1 and 2 explanation according to of the present invention, as the binary vortices volume dry type scroll vacuum pump of the instance of the fluid machinery that is connected to driver part through magnet coupling.As combine the illustrated vacuum pump of Figure 4 and 5; Vacuum pump shown in Figure 1 comprises motion vortex part 13 and fixed scroll 11 and 12; Motion vortex part has plectane and is configured in the helical vortex volume on the both side surface of this plate along the axial direction of pump shaft highlightedly, makes this vortex volume chimeric with the vortex volume with same-handed shape of fixed scroll.
Among Fig. 1, vacuum pump comprises the pump housing 10, driver part 30 and is used to support the supporting element 35 of the pump housing 10 and driver part 30.The pump housing 10 comprises: scroll compressor main body 10a, a pair of black box (closure member) 20 and 25, said black box are connected to the fixed scroll 11 and 12 of each end sections of the live axle 16 that supports the rotational motion scroll respectively airtightly, and the projection that causes each end is respectively by black box 20,25 sealings.The pump housing 10 also comprises pressurized gas inlet 17 and 18 and magnet coupling 31; Pressure is higher than the gas that compressor delivery pressure { encloses the compression pressure of volume (lap) } and is imported into black box 20 and 25 respectively through these gas accesses, and the magnet coupling on-mechanical is delivered to live axle 16 from driver part 30 with rotating torques contiguously.
Like this, by means of the magnet coupling 31 as the driving torque transmission member, vacuum pump and driver part 30 are isolated, and the pollutant that sucks from the suction side can not leak into the surrounding environment side.
The magnet coupling 31 of driver part 30 sides comprises cylindrical external rotor 32 and magnet (external rotor side magnet) 33, and external rotor has the base section that is connected to live axle 30a, and magnet is installed in external rotor 32 inboards.The magnet coupling 31 of vacuum pump side is provided with the internal rotor 23 of the live axle 16 that is connected in the pump housing, guarantees to constitute the black box 20 of seal space 22 around the driven magnet (internal rotor side magnet) 21 of internal rotor installation with around internal rotor 23.(hereinafter, pump side coupling element 23 is called internal rotor 23.)
The partitioned portion of black box 20 is cylindrical and be placed in cylindrical external rotor 32 inboards, be close to magnet 33.Internal rotor 23 is constituted as and makes that being connected in internal rotor 23 driven magnet 21 on every side moves, and is close to the partitioned portion of black box 20, thereby repels and attract to be placed in the magnet (external rotor side magnet) 33 of external rotor 32 inboards effectively.Like this, internal rotor 23 responds the rotation of external rotors 32 and rotates.
The fixed scroll 11 of scroll compressor main body 10a comprises the fixed scroll volume 11a of the spiral wall shape on first side surface that is configured in plectane perpendicular to the plectane of pump shaft line setting with along pump shaft line direction.The dome-shaped plate is as the part of scroll compressor main body 10a shell, and first side surface of this plate is as the slidingsurface of motion vortex volume.
On the other hand, fixed scroll 12 comprises the fixed scroll volume 12a of the spiral wall shape on first side surface that is configured in plectane perpendicular to the plectane of pump shaft line setting with along pump shaft line direction.The dome-shaped plate is as the part of the shell of scroll compressor main body 10a, and first side surface of plate is as the slidingsurface of motion vortex volume.
Motion vortex part has the plectane perpendicular to the pump shaft line, and this plectane is installed on the live axle 16 that is supported by two side bearings perpendicular to pump shaft line ground, so that can be around the axle rotation, the rotation vortex of spiral wall shape be rolled up 13a and is configured on the side surface of plectane.
In motion vortex part 13, the motion vortex volume 13a of spiral wall shape that is configured in the both side surface of spiral wall along axial direction is embedded among the fixed scroll volume 11a and 12a of spiral wall shape.In addition, the end sections of helical fixed scroll volume contacts with the both side surface of the circular discs plate portion of motion vortex part 13, so that on the both side surface of circular discs plate portion, slide.On the other hand, in fixed scroll 11 and 12, the end sections of the motion vortex of spiral wall shape volume 13a and fixed scroll 11 contact with 12 two first side surfaces.The circular discs plate portion of motion vortex part 13 is installed on the live axle 16 with the mode that between the axis of axle and circular discs plate axis, has eccentric distance.Under the booster action of rotation preventive apparatus (not shown in figure 1), moving scroll 13 is around the axis rotation of live axle, and the not rotation on the motion vortex part axis.As top pointed out; Fixed scroll 11 and/or 12 and motion vortex part 13 form a plurality of meniscate compression volumes (pressing chamber); In these spaces, carry out suction process, compression process and the discharge process of gas simultaneously continuously via import 14; Therefore, gas flows through exit passageway 15a reposefully and flows to outlet 15, thereby plays vacuum pump.
In addition, the inert gas that has compressed is compressed N here
2(nitrogen) is blown into the closed space that is formed by motion vortex part 13 and fixed scroll 11 and 12 and in this space, is compressed via pressurized gas inlet 17 and 18.Because the pressure of said inert gas is higher than the pressure via the final exhausting air of outlet 15 dischargings; Promptly; Be higher than the compressor delivery pressure after in these closed spaces, being compressed, compressed gas can not enter the mouth via pressurized gas and 17 and 18 reflux in closed space.
Be that more in addition the live axle 16 in the pump housing supports through the oilless bearing (not shown) of being processed by self-lubricating metal or by will be through the pressurized gas gas bearing (not shown) support of 17 and 18 gases that import as lubricant medium that enter the mouth.Because oil-free lubrication, can estimate not have oil leakage, do not have the lubricant oil mist of oil to diffuse into the exhausting air outside, the bearing durability improves, flight-line maintenance expend minimizing, as stated, pump can not move for a long time with shutting down.In addition, also for live axle is provided with weight equalizer 42 and 43, with the imbalance (so-called crank is uneven) that reduces crank mechanism.
Fixed scroll 12 is provided with the cooling fin (not shown in figure 1) on the frame part of the dome-shaped plate that comprises fixed scroll 12, therefore can realize natural cooling by the air of surrounding environment.In the fixed scroll 11 and 12 that comprises as the circular discs plate portion of the part of the shell of scroll compressor main body 10a or plectane part, be mounted with circular cooling jacket (not shown in figure 1), cooling water can be mobile through the cooling water circulating member (not shown) that is made up of radiator (not shown) and cooling water circulating pump (not shown).Like this, can realize its pressure being cooled off from fixed scroll 11 and 12 dorsal parts.
As stated, through compression, pressure is higher than via the inert gas of the pressure of the final exhausting air of exhaust port 15 discharging and is directed to each tip side of driving shaft bearing via pressurized gas inlet 17 and 18, with through exhaust port 15 dischargings.As a result, reflux in the obstructed overcompression of the gas gas access 17 and 18 through compression in closed space.And the vacuum pump and the outside isolate (except that the attachment portion like import 14, exhaust port 15, pressurized gas inlet 17 and 18 and so on) airtightly.Moreover owing to do not have the Mechanical Contact part as the magnet coupling 31 of driving torque transmission member, this pump need not seal element.So even be inhaled into through inlet from the radioactive pollution material of atomic power device side, pollutant can not leak into the surrounding environment side through pump.For this connection, said references has been explained the binary vortices volume dry type scroll vacuum pump as the fluid machinery instance that is connected to driver part via magnetic coupling in further detail.
Fig. 2 is the amplification sectional view of magnet coupling 31 shown in Figure 1 of the present invention.Magnet coupling 31 is provided with at least one and is installed on as the air-breather in the external rotor 32 of the component parts of magnet coupling 31.For example; Can be with the part place that this air-breather is placed in the driver part side cylindrical bottom portion part of external rotor 32 as reference character 36 is represented; And/or the part place that representes like reference character 39 in the vacuum pump side cylindrical peripheral limit end sections of external rotor 32, thereby form the air-flow shown in arrow among Fig. 2.At this, reference character 20 expression black boies (closure member), 21 expression internal rotor side magnets, 23 expression internal rotors, 30a is the live axle of driver part 30,33 expression external rotor side magnets, 34 expression ventilated ports.
Except that the top part of having mentioned 36 and 39, can air-breather be arranged in the cylindrical peripheral part of external rotor 32, be connected in the cylindrical peripheral limit part of the external rotor between the external rotor side magnet 33 (among Fig. 1) on the inner periphery of external rotor 32, or the like.Preferably make blade/slit (air-breather) be in vacuum pump side (fluid machinery side) and across the driver part 30 side places of the belt-like zone of the external rotor cylindrical peripheral part that external rotor side magnet 33 (among Fig. 1) is housed; And; Preferably can regulate, thereby make ventilating air not be stranded in the external rotor inboard each air importing and/or the air discharge momentum at each blade/place, slit.Air stream by flow through the gap space between external rotor side magnet and the internal rotor side magnet along pump shaft line direction can cool off magnet coupling especially effectively.Here; Part ventilation plant plays upstream passageway, and all the other have installed the effect of downstream passage, here; Preferably less than the channel resistance of upstream passageway, perhaps the importing momentum of upstream passageway is preferably greater than the importing momentum of downstream passage to the channel resistance of downstream passage.
Fig. 3 A, 3B, 3C, 3D, 3E and 3F show the structure and the mounting point of relevant air-breather.Fig. 3 F shows the position that is installed on the air-breather in the external rotor 32 with cross-sectional view.Reference character 30a and 33 representes the live axle and the magnet (external rotor side magnet) 33 of driver part 30 respectively.Reference character 36 expressions are installed in the air-breather of the driver part side cylindrical bottom portion part of external rotor 32, shown in the cross-sectional view 3A that A-A ' along the line dissects; Reference character 37 expression is installed on the air-breather in the cylindrical peripheral part of external rotor 32; Shown in the cross-sectional view 3B that B-B ' along the line dissects; Reference character 38 expressions are installed in the air-breather in the external rotor cylindrical peripheral part between the external rotor side magnet 33 that is incorporated on external rotor 32 inner peripherys; Shown in the cross-sectional view 3C that C-C ' along the line dissects; Reference character 39 expressions are installed in the air-breather of the vacuum pump side cylindrical peripheral limit end sections of external rotor 32, shown in the cross-sectional view 3D that D-D ' along the line dissects.
Shown in Fig. 3 E, the air-breather that is installed on each position comprises that for example, the sense of rotation that favours external rotor 32 is assemblied in a plurality of blades on the external rotor 32.Through being formed at the slit between the blade 40, the air of surrounding environment is imported into the inner space of external rotor 32, and the air that is imported into is discharged into outside external rotor 32.
Shown in Fig. 3 A, the air-breather 36 that is installed in the cylindrical bottom portion part of external rotor 32 in driver part 30 sides can be that the live axle 30a with driver part 30 is a central circular.Certainly, from the actual strength design point of view, solid center (solidhub) (rib) part can be arranged in the torus space in blade and slit.Among Fig. 3 B, air-breather 37 is arranged in the cylindrical peripheral part of external rotor 32.The region can be any part of the cylindrical peripheral part of the external rotor 32 except that the occupied position of magnet, for example, is positioned at the belt-like zone of the external rotor cylindrical peripheral part of inboard external rotor side magnet 33 parts of external rotor 32.
In the air-breather shown in Fig. 3 C 38; Blade is set in place in the external rotor cylindrical peripheral part between external rotor side magnet 33, across the external rotor cylindrical peripheral belt-like zone partly of external rotor side magnet 33 parts that are positioned at external rotor 32 inboards.In Fig. 3 C, with the zone in the magnet 33 be positioned to towards the shaft coupling axis outstanding to the inside rather than towards blade/slit 38 outstanding zones.Yet this outstanding be not necessary condition, certainly, this two zone, be that the internal diameter of magnet areas and blade/gap area can be identical.
Air-breather 39 shown in Fig. 3 D is installed in the vacuum pump side cylindrical peripheral end sections of external rotor 32.Utilization is used for the air of surrounding environment is imported inboard slit, when air-flow directly blows to the partitioned portion of black box 20, and effective coolant seal assembly 20.
In addition, as previously mentioned, can air- breather 36,37,38 and 39 be placed in vacuum pump side (fluid machinery side) and across the driver part 30 side places of the belt-like zone of the external rotor cylindrical peripheral part that is provided with external rotor side magnet 33.Because the air importings/discharge capacity between upstream side and the downstream side is widely different, effective coolant seal assembly 20, and do not have air stream delay (generally) in external rotor 32 inboards.
For obtaining said effect; For example, can make the gap area of the gap area of upstream side less than the downstream side, ambient air can be imported into external rotor 32 inboards through ventilation plant 36; The air that is imported into is discharged into external rotor 32 outsides through ventilation plant 38 and 39; The air of surrounding environment can import through ventilation plant 36, and the air that is imported into can be discharged through ventilation plant 36 and 37, and the quantity of perhaps discharging the side ventilation plant can be less than the ventilation plant quantity that imports side.
As described so far; Be connected in the fluid machinery of driver part through magnet coupling of the present invention; The air- breather 36,37,38 and 39 that is used for importing ambient air is installed in the external rotor 32 of magnet coupling 31, but therefore coolant seal assembly (sealing partitioned portion) 20 and external rotor side magnet (magnet) 33.Through this structure, heat that gas/fluid compression process in fluid machinery produces or the heat that is derived from driver part 30 are transmitted under the situation of magnet coupling, the ambient air cooling that sealing partitioned portion 20 and magnet 33 are imported into.As a result, can avoid the possibility that the space reduces between external rotor side magnet 33 and the black box 20, that is to say, can avoid Mechanical Contact possible between them.In addition, under the situation that the space between rotor-side magnet 33 and the black box 20 increases outside, can avoid owing to the magnetic flux density that arrives driven magnet (internal rotor side magnet) 22 weakens the transmission of torque fault that causes.
And, because air-breather is installed on one's body 32 of the external rotors, need not increase the size of magnet coupling 31 or the useless large space of being followed by the rotation wing conventional around the external rotor.As a result, with regard to magnet coupling and fluid machinery, can realize compact design and production to this device.
Realization has high serviceability and reliability through the fluid machinery that magnetic coupling is connected to driving source according to the present invention, because magnet coupling can be transmitted to magnet coupling from fluid machinery or from driving source with heat by effectively cooling.
Claims (3)
1. one kind is connected to the fluid machinery of driver part through magnet coupling, comprises
Driver part,
The fluid machinery main body that constitutes by the pump unit that comprises compressor;
Magnet coupling, between said driver part and said pump unit, this magnet coupling comprises: external rotor, wherein, the live axle of said driver part is connected to the cylindrical bottom portion part of this external rotor; Be in the external rotor side magnet on the inner periphery of said external rotor; Internal rotor, it is assemblied on the live axle of said pump unit and to be positioned at said external rotor inboard; And, be in the internal rotor side magnet on the outer periphery of said internal rotor, by the sucking action between external rotor side magnet and the internal rotor side magnet and repulsive interaction the transmission of torque of said driver part is arrived said pump unit;
A pair of black box; Said a pair of black box seals the two end part part of the live axle of said pump unit; And one of them black box is the black box of magnet coupling side end, causes that said fluid machinery main body is in air-locked sealing state except that the gas inlet that is provided with, gas discharge outlet and pressurized gas inlet;
Wherein, Air-breather is set; Said air-breather comprises blade and slit; Said blade is arranged in said external rotor along the sense of rotation that favours said external rotor, between adjacent blades, is formed for the said slit that ventilates, so that cool off the black box and the said external rotor side magnet of said magnet coupling side end.
2. the fluid machinery that is connected to said driver part through magnet coupling according to claim 1; Wherein, Said air-breather is installed in the driver part side cylindrical bottom portion part of said external rotor; Or in the cylindrical peripheral part of the said external rotor between the driver part side cylindrical bottom portion of external rotor side magnet and the external rotor part; Or be incorporated in the cylindrical peripheral part of the said external rotor between the said external rotor side magnet on the said external rotor inner periphery, or in the fluid machinery main body side cylindrical peripheral end sections of said external rotor, or in a plurality of parts of the said part of said external rotor.
3. the fluid machinery that is connected to said driver part through magnet coupling according to claim 1; Wherein, Said air-breather is set at driver part side and the said fluid machinery main body side place across the cylindrical banded zone of the cylindrical peripheral part of the said external rotor that is provided with said external rotor side magnet; Part ventilation plant plays upstream passageway, and all the other ventilation plants play the downstream passage, at this; The channel resistance of said downstream passage is less than the channel resistance of said upstream passageway, and perhaps the importing momentum of said upstream passageway is greater than the importing momentum of said downstream passage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006355474A JP4999157B2 (en) | 2006-12-28 | 2006-12-28 | Fluid machine coupled to drive source via magnetic coupling |
| JP355474/06 | 2006-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101225821A CN101225821A (en) | 2008-07-23 |
| CN101225821B true CN101225821B (en) | 2012-06-13 |
Family
ID=39247226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101800644A Active CN101225821B (en) | 2006-12-28 | 2007-12-28 | Fluid machine connected to a drive source via a magnetic coupling |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20080159888A1 (en) |
| EP (1) | EP1939452A3 (en) |
| JP (1) | JP4999157B2 (en) |
| CN (1) | CN101225821B (en) |
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| EP2330324A1 (en) * | 2009-12-07 | 2011-06-08 | Alstom Technology Ltd | Security improved sealed electric machine |
| US11047389B2 (en) | 2010-04-16 | 2021-06-29 | Air Squared, Inc. | Multi-stage scroll vacuum pumps and related scroll devices |
| US20130232975A1 (en) | 2011-08-09 | 2013-09-12 | Robert W. Saffer | Compact energy cycle construction utilizing some combination of a scroll type expander, pump, and compressor for operating according to a rankine, an organic rankine, heat pump, or combined organic rankine and heat pump cycle |
| CN102410235B (en) * | 2011-11-30 | 2014-06-04 | 苏宇贵 | Refrigerating plant |
| CN102536732A (en) * | 2012-02-29 | 2012-07-04 | 大连亿斯德制冷设备有限公司 | Semi-closed piston refrigeration compressor for ammonia |
| CN103306973A (en) * | 2013-05-29 | 2013-09-18 | 沈阳纪维应用技术有限公司 | Oilless vortex fluid mechanical device |
| CN103671015A (en) * | 2013-12-29 | 2014-03-26 | 大连亿莱森玛机电有限公司 | Magnetic transmission piston refrigeration compressor |
| US10508543B2 (en) | 2015-05-07 | 2019-12-17 | Air Squared, Inc. | Scroll device having a pressure plate |
| JP2018053795A (en) * | 2016-09-28 | 2018-04-05 | 三井精機工業株式会社 | Cooling mechanism of scroll compressor |
| US10865793B2 (en) | 2016-12-06 | 2020-12-15 | Air Squared, Inc. | Scroll type device having liquid cooling through idler shafts |
| BE1025570B1 (en) * | 2017-09-21 | 2019-04-17 | Atlas Copco Airpower Naamloze Vennootschap | Cylindrical symmetrical volumetric machine |
| US11454241B2 (en) | 2018-05-04 | 2022-09-27 | Air Squared, Inc. | Liquid cooling of fixed and orbiting scroll compressor, expander or vacuum pump |
| US11067080B2 (en) | 2018-07-17 | 2021-07-20 | Air Squared, Inc. | Low cost scroll compressor or vacuum pump |
| US20200025199A1 (en) | 2018-07-17 | 2020-01-23 | Air Squared, Inc. | Dual drive co-rotating spinning scroll compressor or expander |
| US11530703B2 (en) | 2018-07-18 | 2022-12-20 | Air Squared, Inc. | Orbiting scroll device lubrication |
| US11473572B2 (en) | 2019-06-25 | 2022-10-18 | Air Squared, Inc. | Aftercooler for cooling compressed working fluid |
| CN110760323B (en) * | 2019-09-24 | 2021-03-30 | 中国石油天然气集团有限公司 | Magnetic coupling seal transmission structure and thermal reaction furnace |
| US11898557B2 (en) | 2020-11-30 | 2024-02-13 | Air Squared, Inc. | Liquid cooling of a scroll type compressor with liquid supply through the crankshaft |
| US11885328B2 (en) | 2021-07-19 | 2024-01-30 | Air Squared, Inc. | Scroll device with an integrated cooling loop |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP1939452A3 (en) | 2009-11-25 |
| JP2008163865A (en) | 2008-07-17 |
| CN101225821A (en) | 2008-07-23 |
| EP1939452A2 (en) | 2008-07-02 |
| JP4999157B2 (en) | 2012-08-15 |
| US20080159888A1 (en) | 2008-07-03 |
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