CN1028379C - Scroll machine with floating seal - Google Patents
Scroll machine with floating seal Download PDFInfo
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- CN1028379C CN1028379C CN91108516A CN91108516A CN1028379C CN 1028379 C CN1028379 C CN 1028379C CN 91108516 A CN91108516 A CN 91108516A CN 91108516 A CN91108516 A CN 91108516A CN 1028379 C CN1028379 C CN 1028379C
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- Prior art keywords
- vortex
- sealing
- groove
- type machinery
- band edge
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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
- F04C28/265—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 being obtained by displacing a lateral sealing face
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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
- F04C18/06—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 of other than internal-axis type
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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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- 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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/005—Axial sealings for working fluid
Abstract
A scroll machine utilizing working fluid under pressure to enhance axial sealing, including several embodiments of a multi-function floating seal to isolate the axial biasing fluid, and provide vacuum protection and a degree of high pressure ratio protection.
Description
The present invention relates to the seal arrangement of vortex-type machinery, more particularly, relate to a kind of multi-functional floating seal that is used for the vortex-type compressor of axial servo-actuated.
Typical vortex-type machinery has one and is furnished with spirochetal trackless operation (hereinafter to be referred as trackless) whirlpool type body being furnished with spirochetal rail operation (hereinafter to be referred as rail) whirlpool type body and on the one end on one end, above-mentioned two heliconids are meshing with each other, have in addition and make rail whirlpool type body make the device of circular orbit motion with respect to trackless whirlpool type body, thereby between this two heliconid, produce the inner chamber that volume gradually changes around one.
In order to reach peak efficiency, the seepage that the end plate of the heliconid top of each whirlpool type body and another whirlpool type body is engaged hermetically to reduce to greatest extent between them is very important.(this device installs very difficult except using the end sealing device, and often have a reliability problems) outside, also can use a kind of by means of the fluid under the certain pressure make a whirlpool type body vertically the method for another whirlpool type solid offsetting reach the purpose of sealing.Certainly, this needs some to have the seal arrangement that required pressure comes with the fluid isolation that causes skew, thereby, in the vortex-type machinery field, need to continue to improve the axial dipole field technology, comprise and improve the seal arrangement that this migration technology is achieved.
Disclose a kind of vortex-type compressor among the German patent application DE3255-854A, this compressor comprises: a can; One places in the shell and the rail operation volute body of first scrollwork is arranged on one end: one places in the shell and the trackless scroll of second scrollwork is arranged on the one end, and scrollwork is engaged with each other on two; Make rail operation volute body around axle with respect to the Orbiting device of trackless volute body, thereby make this two scrollwork produce the inner chamber that volume gradually changes; In order to being installed, one of them volute body make it have limited axially movable device with respect to another volute body; Process an annular groove so that the pressurized stream physical efficiency in this groove makes the device of this volute body to another volute body skew on a volute body surface therein; This groove has madial wall and outer side wall; Provide pressure fluid to make two volute bodies device of axial dipole field together to groove; Be placed in the annular seal in the groove, the sealing device engages with groove inner seal ground respectively, in order to pressure fluid in the isolated groove and leakage way.
The objective of the invention is to above-mentioned D.B.P. is done further to improve, thereby provide a kind of through improved, simple in structure, be easy to install and check, and can provide the floating seal of required various complicated sealing functions and the vortex-type machinery of using this seal arrangement effectively.
For achieving the above object, the invention provides a kind of vortex-type machinery, comprising with floating seal:
(a) can;
(b) one place in the shell and the first spirochetal rail operation volute body is arranged on one end;
(c) one place in the shell and the second spirochetal trackless operation volute body is arranged on one end, this two heliconid is meshing with each other;
(d) make rail operation volute body move the Orbiting device of volute body with respect to trackless, thereby make this two heliconid between a suction pressure district and a head pressure district, produce the inner chamber that volume gradually changes around one;
(e) in order to being installed, one of them volute body make it have the device of limited axial motion with respect to another volute body;
(f) limit the device of a groove therein on a volute body surface;
(g) in order between described groove and described enclosure, to form the device of a fluid leakage way;
(h) provide the device of pressure fluid to described groove; With
(i) be placed in seal arrangement in the described groove.
It is characterized in that, described seal arrangement in described groove between a primary importance and a second place axial float, when primary importance, described seal arrangement isolates a head pressure district that distinguishes with suction pressure in described shell, and when the second place, allow the head pressure escape of liquid to go into the suction pressure fluid.
The present invention also provides a kind of vortex-type machinery of floating seal, comprising:
(a) can:
(b) one place in the shell and the first spirochetal rail operation volute body is arranged on one end;
(c) one place in the shell and the second spirochetal trackless operation volute body is arranged on one end, this two heliconid is meshing with each other;
(d) make rail operation volute body around one with respect to the Orbiting device of trackless operation volute body, thereby make this two heliconid produce inner chamber that volume gradually changes so that fluid is compressed to a head pressure from a suction pressure;
(e) in order to being installed, one of them volute body make it have the device of limited axial motion with respect to another volute body;
(f) leave a groove so that the pressurized stream physical efficiency in this groove makes the device of this volute body to another volute body skew on a volute body surface therein;
(g) in order in groove and shell, to form the device of one first current by pass between the suction pressure district;
(h) in order in groove and shell, to form the device of one second current by pass between the head pressure district;
(i) provide middle pressure between suction pressure and head pressure so that the two volute bodies device of axial dipole field together to groove; With
(j) be placed in seal arrangement in the groove.
It is characterized in that,
The sealing device comprises three black boies, first black box separates the pressure fluid in the groove with first leakage way, and the second black box spaced apart grooves and the second leakage hole passage and the 3rd black box separate fluid under the suction pressure and the fluid under the head pressure makes it can not be by the end face of seal arrangement.
The present invention also provides a kind of sealing assembly parts that are used for vortex-type machinery, comprising:
(a) outside of one and first cylindrical surface engage hermetically the annular in the band edge Sealing,
(b) the outer band edge Sealing of annular of the inner seal ground of one and second cylindrical surface joint, the sealing assembly parts can move along described each Sealing axis;
(c) first and second clamping members that above-mentioned first and second seal rings are clamped;
(d) one and above-mentioned two members in one of the 3rd annular seat component of corresponding actions, sealing member and is generally plane ring shaped sealing surfaces and engages hermetically.
Seal arrangement of the present invention specifically can be used in the compressor, and can be used for only using head pressure, and the middle pressure of using head pressure simultaneously and forming separately, or in the machinery of pressing in only using so that necessary axial dipole field power to be provided, thereby improves the sealing on top.In addition, the present invention is applicable to the situation of skew trackless whirlpool type body or skew rail whirlpool type body by the synthetic holistic seal arrangement of three Sealings in most of embodiments, and be particularly useful for the former.
Seal arrangement of the present invention also has other significant advantage.For example, this seal arrangement is very responsive to the pressure ratio of vortex-type machinery, thereby can be to playing the favorable protection effect such as the vacuum condition of reversing and the air inlet obstruction causes.In this case, seal arrangement is ineffective, directly enters the air-breathing district with pressure of inspiration(Pi) by bypass so that discharge fluid.This can prevent to form high vacuum and produce and two whirlpool type bodies are pulled in together excessive have destructive power in compressor inlet one side.What is more important, it can prevent to produce spark or burning between motor protection device connector pin, and this is once to find under some vacuum condition.
Seal arrangement among the present invention can also provide temperature protection to a certain degree in some applications, especially with in the compressor by the motor drive that sucks the gas cooling motor.This is because when the pressure difference of high pressure one side and low pressure one side is much higher than the design pressure difference, and sealing allows from high pressure one side direction low pressure one side earial drainage.This discharge fluid that makes will make the fluid output quantity reduce to the method for compressor inlet side leakage, and compressor is inner will to make the disconnection of standard motor protector shut down owing to cooling blast reduces the heat that produces.This feature of seal arrangement of the present invention is in some applications to because the loss of working fluid or because the stall of being obstructed of cooling fan in the refrigeration system, or the too high discharge temperature that causes owing to head pressure excessive (no matter which kind of reason) can provide protection to a certain degree.All these do not wish that situation about occurring will cause that all vortex-type machinery works under the also high condition of pressure ratio that beguine is designed according to predetermined volume ratio.
From following drawings and detailed description, these and other advantage of the present invention will become more obvious.
Fig. 1 is the part vertical cross-section diagram of vortex-type machinery, and wherein hydrodynamic pressure is used to make the trackless volute body vertically to organic volute body skew, and it has embodied principle of the present invention;
Fig. 2 be among Fig. 1 as the amplification vertical cross-section diagram of the floating seal of first embodiment of the invention part, seal arrangement is in relaxed state among the figure;
Fig. 3 is the cross-sectional view along 3-3 line among Fig. 2, the intercepting position of line 2-2 displayed map 2 middle sections;
Fig. 4 is second embodiment of of the present invention floating seal similar to Fig. 1;
Fig. 5 is the vertical cross-section diagram that is placed on of seal arrangement part among Fig. 4;
Fig. 6 is for being in the amplification vertical cross-section diagram of the floating seal of relaxed state among Fig. 4;
Fig. 7 be among Fig. 6 along the cross-sectional view of 8-8 line, line 6-6 has shown the intercepting position of Fig. 6 middle section;
The 3rd embodiment's of Fig. 8 is the demonstration similar to Fig. 1 floating seal of the present invention partial view;
Fig. 9 is for being in the amplification vertical cross-section diagram of the floating seal of relaxed state among Fig. 8;
Figure 10 is along the cross-sectional view of 10-10 line among Fig. 9;
Though the present invention is applicable to many dissimilar vortex-type machineries, explanation describes with reference to the longitudinal section among Fig. 1 being applied to a kind of the present invention with whirlpool type refrigeration compressor of common structure below for example.Usually, compressor comprises a tubular can 10, is welded with an end cap 12 in the top, has consistent cold type to go out device 14 on the end cap, and a common valve (not shown) can be installed therein.Other is fixed on the dividing plate 16 that device on the shell comprises a horizontal expansion, and it is welded on the shell 10 in same area along its edge and end cap 12; One main bearing box 18 can be fixed on the shell 10 and a suction inlet device 17 that has a fluid director 19 to communicate with it inside the shell by any way in many places.
One cross section is substantially motor stator 20 square but that have a fillet and is fitted in the shell 10.Plane between the stator fillet provides passage 22 between stator and shell, it makes the lubricant oil can be from the overhead stream of shell to the bottom.There is the axle journal of the bent axle 24 of an eccentric crank pin 26 to be contained in bearing 28 in the main bearing box 18 and second bearing in the bottom bearing housing (not shown) in the top and turns.There is the oil suction center hole (not shown) that diameter is bigger comparatively speaking usually the lower end of bent axle 24, and it and the footpath outwards inclined to one side less hole 30 of diameter communicate and extend upwardly to the bent axle top.The bottom of shell 10 is full of lubricant oil in due form, and the pump that is positioned at bent axle bottom is the one-level pump, and it links to each other with the hole 30 with two stage pump effect, needs the various piece of lubricating in the compressor so that lubricant oil is extracted into.
Bent axle 24 is rotated by an electrical motor driven, and the coil 32, that electric motor comprises stator 20, therefrom pass through is fitted in rotor 34 and the one or more balancer weight gauge block 36 on the bent axle.The motor protector 35 of one common type nestles up coil 32 and mounted thereto, and when the temperature of motor surpassed its normal temperature range, protector promptly disconnected motor power.
One planar annular thrust supporting surface 38 is arranged on the upper surface of main bearing box 18, place a rail volute body 40 on it, this volute body has one and is furnished with common heliconid 44 on the surface thereon and the end plate 42 of a planar annular thrust surface 46 is arranged on its lower surface, stretch out a cylindrical sleeve 48 that shaft bearing 50 arranged downwards within it from lower surface, wherein be rotatably mounted with one and in the hole 54 drive sleeve 52 that drives crank pin 26 be housed within it.On the surface of crank pin 26 a plane (not shown) is arranged, the plane (not shown) on the part in this plane and hole 54 is bonded with each other, so that a servo-actuated drive unit radially to be provided, this device sees 4,877, No. 382 U. S. Patents, its disclosed content is used for referencial use here.
Heliconid 44 is installed on the main bearing box 18 to limit the axial motion of volute body 58 in the mode of any necessity with trackless heliconid 56 engagements that constitute rail volute body 58 parts, trackless volute body 58.Concrete installation method and the present invention are irrelevant, but in the present embodiment, just needs for example are described: trackless volute body 58 has many along the circumferential direction at a distance of shown one of them in the installation base 60(figure that is provided with), each boss has a upper surface 62 and an axial bore 64, one sleeve pipe 66 is installed in the hole slidably, and it is installed on the main bearing box 18 in mode shown in scheming by bolt 68.Bolt 68 has a head that strengthens, have lower planes 70 that engage with surface 62 with restriction trackless volute body vertically upwards or the motion that separates on the head, rightabout axial motion is subjected to the restriction of axial engagement on the last plane of the following top end of heliconid 56 and rail volute body 40.
The middle part of trackless volute body 58 has one and the current by pass 72 that communicates of the groove 74 of upward opening, and it communicates by the earial drainage noise elimination cavity 76 of opening the opening 75 on isolating plate 16 and be made of end cap 12 and isolating plate 16.One annular groove 78 is arranged on the upper surface of trackless volute body 58, parallel coaxial sidewall at this groove is mounted with the annular floating seal 80 that can do to move to axial sealedly, it comes the bottom of groove 78 with the gas barrier that is under suction pressure and the head pressure, thereby the bottom of groove 78 is communicated by passage 82 and middle hydraulic fluid.Trackless volute body 58 is in the head pressure that acts on its center portion and act under the effect of middle pressure of groove 78 bottoms to rail volute body axial dipole field.This under pressure axial dipole field and various support volute body 58 to limit the technology of its axial motion, in U.S. Patent No. 4,877, obtain detailed open explanation in 328.
Relatively rotating by common Euclidean connector of two volute bodies self prevents that it from comprising that one has shown in the radially relative groove 86(figure that is placed in slidably on the volute body 58 one of them) in first couple of pin 84(figure shown in one of them) be placed in volute body 40 slidably on radially relative groove (not shown) in the annulus 82 of second pair of pin (not shown).
Compressor preferably adopts " downside " air inlet type, and wherein the gas that enters by guide plate 19 can partly escape in the shell with cooling motor.As long as in the shell a suitable gas backstreaming is arranged, motor is remained in the temperature range that needs.When this air-flow stops, cooling will cause motor protector 35 to disconnect inadequately and shut down.
The vortex-type compressor that the front is roughly described or be prior art, or the content of the patent application of examining.The structure of the imbody principle of the invention is included among several embodiments of relevant Multifunction floating seal.
With reference to Fig. 1-5, in having first embodiment of coaxial overlaying structure, floating seal comprises an annular bottom plate 100 of being cast by aluminium or other material, have on the base plate a plurality of equidistantly, erect it on and the boss 102 in aggregates with it, each boss has the bottom 104 of an increasing.On base plate 100, be provided with an annular gasket 106 that forms by the lamination coating of band epoxy resins coating, the hole that has a plurality of spacings that cooperate with bottom 104 to equate on it, pad 106 is provided with a pair of flat identical bottom band edge seal ring 108 that is generally, and the sealing ring is by being added with glass filler (about 5%) and can containing 5%MoS by weight
2Polytetrafluoroethylene (PTFE) constitute.The hole that being used for of having on the seal ring 108 that a plurality of spacings equate cooperates with bottom 104.Settle a toroidal membrane 110 on the seal ring 108, it can be a simple steel pressing, and annular groove 112 and 114 are arranged on its end face and bottom surface, and the hole that holds bottom 104 that has a plurality of spacings to equate.It on dividing plate 110 a pair of flat identical annular upper portion band edge seal ring 116 that is generally, this to seal ring by constituting with band edge seal ring 108 identical materials, and keep coaxial position each other by the annular upper portion sealing plate 118 that the Kong Bingyou that have a plurality of spacings of holding boss 102 to equate thereon are placed in the annular flange flange 120 in the groove 112, on the inner circumference limit of the sealing plate 118 that forms by gray cast iron a plane sealing lip 122 that protrudes upward is arranged.These assemblies are fixed together by shape shown in the end swaged forging one-tenth as 123 of each boss 102.
As shown in Figure 1, whole black box provides three kinds of different sealings, that is, and and the sealing of the internal diameter at 124 and 126 places, the external diameter sealing at 128 places and the top seal at 130 places.Sealing is 124 between the inner circumference limit and groove 78 madial walls of seal ring 108, and sealing 126 is between the madial wall of the inner circumference limit of seal ring 116 and groove 78.The fluid isolation that sealing 124 and 126 will be arranged under the head pressure of the hydraulic fluid of groove 78 bottoms and groove 74 comes.Sealing 128 is between the outer side wall of the outer annulus edge of seal ring 108 and groove 78, and the fluid partitioning that will be arranged under the suction pressure of the hydraulic fluid of groove 78 bottoms and shell 10 comes.What sealing 130 constituted at sealing lip 122 with by cast iron or other material is bonded in around opening 75 between the annular wear ring 132 on the isolating plate 16, to separate the fluid that is under the suction pressure and to be in fluid under the head pressure.In order to replace the independent wear ring as last Sealing, isolating plate 16 can be made partially hardened by nitrogenize, cyaniding or other method around the lower surface of opening 75 and handle.
The diameter of sealing 130 should suitably be selected, so that in normal working conditions, that is, is acting on a sealing force that makes progress reliably under the normal pressure difference on seal arrangement 80.Therefore, when pressure difference was excessive, this seal arrangement was discharged from pressure and pushes away downwards, thereby, allow the discharge gas of high side directly to suck the gas zone leakage to downside by seal arrangement.When this leakage is arrived to a certain degree greatly, then the evapotranspiration of the required suction gas stream of cooling motor (when the temperature of the discharge gas that leaks is too high, will be more serious) will make motor protector disconnect, thereby motor and power supply are disconnected.Sealing 130 width should suitably be selected so that seal unit pressure on (between sealing lip 122 and seat board 132) greater than common head pressure, to guarantee reliable sealing.
According to Fig. 4-7, have floating seal among second embodiment of coaxial overlaying structure equally and comprise that one is that cast by aluminium or other material and have an annular bottom plate 200 of the flange in aggregates with it 202 that an annular upwards erects.On base plate 200, place band edge Sealing 204 in the bottom that constitutes by the polytetrafluoroethylene (PTFE) that contains 5% glass and 5% molybdenum sulfide with a taper elastic packing lip 206; With an outer band edge Sealing 208 that constitutes by same material with an elastic cone sealing lip 210.With the flange 202 inboard endless metal isolating plates 212 of placing, its upper and lower surface is continuous corrugated Mechanical Contact with increase and Sealing on Sealing 204.On isolating plate 212, place a pair of identical by with band edge Sealing 204 and 208 identical materials constitute on band edge Sealing 214, this also keeps its coaxial positions by an annular flange flange 202 to Sealing, also places a upper seal 216 that is mounted with a plane sealing lip 218 that protrudes upward within it on the periphery on isolating plate 212.Sealing 214 has sealing lip 220 in the elastic cone.Sealing 216 preferably is made of cast iron.Outside seal may 208 is by metal ring 222 location, and whole assembly by with among the top hammering Cheng Rutu at the position of some each intervals on the flange 202 shown in 224 shape be fixed together.
As shown in Figure 4, this black box also provides three kinds of different sealings, that is, and and the sealing of the internal diameter at 226 and 228 places, the external diameter sealing at 230 places and the top seal at 232 places.Sealing 226 is between the madial wall of the inner circumference limit of Sealing 204 and groove 78, and sealing 228 is between the madial wall of the inner circumference limit of Sealing 214 and groove 78.The fluid that sealing 226 and 228 will be arranged under the head pressure of the hydraulic fluid of groove 78 bottoms and groove 74 separates.Sealing 230 is between the outer side wall of the outer annulus edge of Sealing 208 and groove 78, and the fluid partitioning that will be arranged under the suction pressure of the hydraulic fluid of groove 78 bottoms and shell 10 is opened.Sealing 232 is between sealing lip 218 and the annular wear ring 132 around isolating plate 16 upper sheds 75, to separate fluid that is under the suction pressure and the fluid that is under the head pressure.Identical among the diameter of top seal and the system of selection of width and first embodiment.
According to Fig. 8-10, have floating seal among the 3rd embodiment of coaxial overlaying structure equally and comprise an annular bottom plate 300 of casting by aluminium or other material, holding up and the boss 302 in aggregates with it from shallow annular flange flange 304 that a plurality of spacings equate arranged on the base plate.The interior band edge Sealings 306 that on the inner circumference of base plate 300, constitute with a pair of identical polytetrafluoroethylene (PTFE) that is generally plane shape of flange 304 inboard arrangements by suitably being added with filler.On the excircle of base plate 300, settle a pair of be generally plane shape identical by band edge Sealing 308 outside the annular that constitutes with Sealing 306 same materials with flange 304 outsides.These two pairs of Sealings keep coaxial by flange 304, and by an annular seal plate 310 with the identical hole that holds boss 302 of a plurality of spacings position that is fixedly clamped.Sealing plate 310 preferably is made of gray cast iron, forged steel or powdered metal, protrudes upward a plane sealing lip 312 within it on the circle edge.Assembly is by with shape and being fixed together shown in 314 among the top swaged forging Cheng Rutu of each boss 302.
As shown in Figure 8, whole black box provides three kinds of different sealings, that is, and and the external diameter sealing at the sealing of the internal diameter at 316 places, 318 places and the top seal at 220 places.Sealing 316 is between the madial wall of the inner circumference limit of Sealing 306 and groove 78.The fluid partitioning that sealing 316 will be arranged under the head pressure of the hydraulic fluid of groove 78 bottoms and groove 74 comes.Sealing 318 is between the outside of the outer annulus edge of Sealing 308 and groove 78, and the fluid that will be arranged under the suction pressure of the hydraulic fluid of groove 78 bottoms and shell 10 separates to come.Sealing 320 is on sealing lip 312 and the isolating plate 16 between the annular wear ring 132 around opening 75, and separates the fluid that is under the suction pressure and be in fluid under the head pressure.The diameter of top seal and width select with first embodiment in the same.
For the too high middle pressure of formation between the outside seal may in preventing under the situation of fluid retardance, as among 125 places and Fig. 8 among Fig. 2 shown in 316, provide a suitable exhaust port.
Invention has been described in conjunction with these examples above, the qualification in following claims, what restriction the present invention do not done.Skilled professional workforce also can make other and without prejudice to the example of essence of the present invention after specification of the present invention and accompanying drawing are studied.
Claims (51)
1, a kind of vortex-type machinery with floating seal comprises:
(a) can;
(b) one place in the shell and the first spirochetal rail operation volute body is arranged on one end;
(c) one place in the shell and the second spirochetal trackless operation volute body is arranged on one end, this two heliconid is meshing with each other;
(d) make rail operation volute body move the Orbiting device of volute body with respect to trackless, thereby make this two heliconid between a suction pressure district and a head pressure district, produce the inner chamber that volume gradually changes around one;
(e) in order to being installed, one of them volute body make it have the device of limited axial motion with respect to another volute body;
(f) limit the device of a groove therein on a volute body surface;
(g) in order between described groove and described enclosure, to form the device of a fluid leakage way;
(h) provide the device of pressure fluid to described groove; With
(i) be placed in seal arrangement in the described groove,
It is characterized in that, described seal arrangement in described groove between a primary importance and a second place axial float, in primary importance, described seal arrangement isolates a head pressure district that distinguishes with suction pressure in described shell, and when the second place, allow the head pressure escape of liquid to go into the suction pressure fluid.
2, a kind of vortex-type machinery described in claim 1 is characterized in that, described groove has a madial wall and an outer side wall, and madial wall and outer side wall are coaxial tubular, and the pressurized stream physical efficiency in the groove makes a whirlpool type body to another whirlpool type solid offsetting.
3, a kind of vortex-type machinery described in claim 2 is characterized in that, this machinery for this pressure fluid of compressor for be compressed to working fluid under the head pressure from suction pressure.
4, a kind of vortex-type machinery described in claim 3 is characterized in that, this pressure fluid has the middle pressure between suction pressure and head pressure.
5, a kind of vortex-type machinery described in claim 1 is characterized in that, described seal arrangement have respectively with groove in first and second black boies that engage hermetically of outer side wall, in order to pressure fluid in the isolated groove and leakage way.
6, a kind of vortex-type machinery described in claim 1, it is characterized in that, described seal arrangement is an overlaying structure, and it comprises that one first annular construction member and second annular construction member, described first and second black boies have the flat interior and outer ring band edge Sealing that is generally that grips between above-mentioned two annular construction members.
7, a kind of vortex-type machinery described in claim 6 is characterized in that, described interior band edge and outer band edge Sealing fuse mutually.
8, a kind of vortex-type machinery described in claim 6 is characterized in that, described interior band edge and outer band edge Sealing are two independent members.
9, a kind of vortex-type machinery described in claim 6 is characterized in that, described band edge Sealing is made of the polytetrafluoroethylene (PTFE) that is added with filler.
10, a kind of vortex-type machinery described in claim 9 is characterized in that, is filled with glass in the polytetrafluoroethylene (PTFE).
11, a kind of vortex-type machinery described in claim 10 is characterized in that, glass accounts for 5% of sealing material weight greatly.
12, a kind of vortex-type machinery described in claim 9 is characterized in that, is filled with MoS in the described polytetrafluoroethylene (PTFE)
2
13, a kind of vortex-type machinery described in claim 12 is characterized in that MoS
2Account for 5% of sealing material weight.
14, a kind of vortex-type machinery described in claim 6 is characterized in that, described band edge Sealing has the profile on plane when pressurized not.
15, a kind of vortex-type machinery described in claim 6 is characterized in that, described each band edge Sealing all has a tapered slightly periphery that exposes when pressurized.
16, a kind of vortex-type machinery described in claim 15 is characterized in that, a plurality of interior and outer band edge Sealings are arranged.
17, a kind of vortex-type machinery described in claim 6 is characterized in that, a plurality of interior band edge Sealings are arranged, and an annular space member is arranged between them.
18, a kind of vortex-type machinery described in claim 17 is characterized in that, described spacer member is made of relative firmer material, and forms the corrugated body that a plurality of and described band edge Sealing engages in its surface.
19, a kind of whirlpool type mechanism described in claim 6 is characterized in that, a plurality of boss that axially stretch out and pass second member separated by a distance are arranged on the circle edge of first member.
20, a kind of vortex-type machinery described in claim 19 is characterized in that, the free end of described boss through swaged forging to clamp the band edge Sealing between described member.
21, a kind of vortex-type machinery described in claim 19 is characterized in that, described band edge Sealing fuses mutually, and described boss therefrom passes.
22, a kind of vortex-type machinery described in claim 19 is characterized in that, described in and outer band edge Sealing be independent member, described boss passes between them.
23, a kind of whirlpool type mechanism described in claim 6 is characterized in that, the flange that described first member has a ring shaped axial to extend, and second member is made of two annular construction members that place the relative both sides of flange.
24, a kind of vortex-type machinery described in claim 23 is characterized in that, described flange along circumference some positions separated by a distance through hammering to clamp described two annular construction members and the band edge Sealing between described member.
25, a kind of vortex-type machinery described in claim 6 is characterized in that, a plurality of interior band edge Sealings are arranged.
26, a kind of vortex-type machinery described in claim 6 is characterized in that, described machinery is compressor, and between the zone that is under the head pressure in described groove and shell one second leakage way is arranged.
27, a kind of vortex-type machinery described in claim 26 is characterized in that, first and first black box is isolated groove and head pressure district also.
28, a kind of vortex-type machinery described in claim 26, it is characterized in that, an end face of described seal arrangement is exposed in the fluid in the groove, first black box of sealing device separates out groove and head pressure, second black box separates groove and enclosure, and another end face that is oppositely arranged of seal arrangement is exposed in enclosure and the head pressure simultaneously, and the sealing device comprises that one separates the 3rd annular seal assembly that enclosure and head pressure make this opposing end surface that fluid can not be by the sealing device.
29, a kind of vortex-type machinery described in claim 28 is characterized in that, second member of described the 3rd sealing component and described seal arrangement forms an integral body.
30, a kind of vortex-type machinery described in claim 26 is characterized in that, described seal arrangement can axially float in groove.
31, a kind of vortex-type machinery described in claim 28 is characterized in that, a fluid exhaust port is arranged on the dividing plate in the compressor case, and described the 3rd sealing ring is around this exhaust port.
32, a kind of vortex-type machinery described in claim 31 is characterized in that, it also comprises a hardened valve seats around exhaust port on the described dividing plate.
33, a kind of vortex-type machinery described in claim 32 is characterized in that, described valve seat is one to be fixed on independent annular construction member on the dividing plate around numerous mouth.
34, a kind of vortex-type machinery described in claim 32 is characterized in that, described valve seat is around the surface through differential hardening of exhaust port on the dividing plate.
35, a kind of vortex-type machinery described in claim 1 is characterized in that, a described volute body is a trackless operation volute body.
36, a kind of vortex-type machinery described in claim 1 is characterized in that, described machinery is compressor, and this compressor has second leakage way of discharge zone and between groove and this discharge zone with head pressure.
37, a kind of vortex-type machinery described in claim 36 is characterized in that, described first and second black boies are isolated groove and head pressure district also.
38, a kind of vortex-type machinery described in claim 36, it is characterized in that, an end face of described seal arrangement is exposed in the liquid in the groove, first black box of sealing device separates out groove and head pressure, second black box separates groove and enclosure, and another end face that is oppositely arranged of seal arrangement is exposed in enclosure and the head pressure simultaneously, and the sealing device comprises that one separates the 3rd annular seal assembly that enclosure and head pressure make this apparent surface that fluid can not be by the sealing device.
39, a kind of whirlpool type described in claim 38 is characterized in that, second member of the 3rd sealing component and seal arrangement is an integral body.
40, a kind of vortex-type machinery with floating seal comprises:
(a) can;
(b) one place in the shell and the first spirochetal rail operation volute body is arranged on one end;
(c) one place in the shell and the second spirochetal trackless operation volute body is arranged on one end, this two heliconid is meshing with each other;
(d) make rail operation volute body transport the Orbiting device of volute body with respect to trackless, thereby the inner chamber that this two heliconids generation volume is gradually changed so that being put pressure from a suction, fluid is compressed to a head pressure around one;
(e) in order to being installed, one of them volute body make it have the device of limited axial motion with respect to another volute body;
(f) leave a groove so that the pressurized stream physical efficiency in this groove makes the device of this volute body to another volute body skew on a volute body surface therein;
(g) in order in groove and shell, to form the device of one first current by pass between the suction pressure district;
(h) in order in groove and shell, to form the device of one second current by pass between the head pressure district;
(i) provide middle pressure between suction pressure and head pressure so that the two volute bodies device of axial dipole field together to groove; With
(j) be placed in seal arrangement in the groove.
It is characterized in that,
The sealing device comprises three black boies, first black box separates the pressure fluid in the groove with first leakage way, and the second black box spaced apart grooves and the second leakage hole passage and the 3rd black box separate fluid under the suction pressure and the fluid under the head pressure makes it can not be by the end face of seal arrangement.
41, a kind of vortex-type machinery described in claim 40 is characterized in that, described seal arrangement floats in groove vertically, and first and second black boies are still remained valid.
42, a kind of vortex-type machinery described in claim 40, it is characterized in that, described seal arrangement has overlaying structure, comprise one first annular construction member and one second annular construction member, wherein first and second black boies have to be clamped in and are generally the interior of plane and outer ring band edge Sealing between the above-mentioned member.
43, a kind of vortex-type machinery described in claim 42 is characterized in that, interior and outer band edge Sealing fuses mutually.
44, a kind of vortex-type machinery described in claim 42 is characterized in that, interior and outer band edge Sealing is two independent members.
45, a kind of vortex-type machinery described in claim 42 is characterized in that, a plurality of interior band edge Sealings are arranged, and an annular space member is arranged between them.
46, a kind of vortex-type machinery described in claim 40 is characterized in that, the profile of all Sealings all is a ring, and the 3rd black box has appropriate diameter so that reliably clean sealing force is provided in normal working conditions.
47, a kind of vortex-type machinery described in claim 46 is characterized in that, the 3rd black box have suitable width so that the unit pressure of sealing on the direction greater than normal head pressure.
48, a kind of vortex-type machinery described in claim 40 is characterized in that, described seal arrangement axially floats in groove, wherein, when there is vacuum in compressor inlet, can cause that seal arrangement moves axially and can cause the 3rd black box to lose efficacy.
49, a kind of sealing assembly parts that are used for vortex-type machinery comprise:
Band edge Sealing in the annular that the outside of one and first cylindrical surface engages hermetically;
The outer band edge Sealing of annular that the inner seal ground of one and second cylindrical surface engages,
It is characterized in that described sealing assembly parts can move along described each Sealing axis, and have:
First and second clamping members with above-mentioned first and second seal rings clamping; And
One and above-mentioned two members in one of the 3rd annular seat component of corresponding actions, sealing member and is generally plane ring shaped sealing surfaces and engages hermetically.
50, a kind of sealing assembly parts described in claim 49 is characterized in that, three coaxial settings of Sealing.
51, a kind of sealing assembly parts described in claim 49 is characterized in that, the described first and second tubular faces are two sidewalls of annular groove, and the bottom of described sealing surfaces and groove is oppositely arranged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US59145490A | 1990-10-01 | 1990-10-01 | |
| US591,454 | 1990-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060699A CN1060699A (en) | 1992-04-29 |
| CN1028379C true CN1028379C (en) | 1995-05-10 |
Family
ID=24366553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91108516A Expired - Lifetime CN1028379C (en) | 1990-10-01 | 1991-08-28 | Scroll machine with floating seal |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0479421B1 (en) |
| JP (1) | JP2922343B2 (en) |
| KR (1) | KR100188324B1 (en) |
| CN (1) | CN1028379C (en) |
| AU (1) | AU651606B2 (en) |
| BR (1) | BR9103456A (en) |
| CA (1) | CA2046548C (en) |
| DE (1) | DE69115422T2 (en) |
| MX (1) | MX9100629A (en) |
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- 1991-08-02 AU AU81539/91A patent/AU651606B2/en not_active Expired
- 1991-08-05 DE DE69115422T patent/DE69115422T2/en not_active Expired - Lifetime
- 1991-08-05 EP EP91307172A patent/EP0479421B1/en not_active Expired - Lifetime
- 1991-08-12 MX MX9100629A patent/MX9100629A/en unknown
- 1991-08-13 BR BR919103456A patent/BR9103456A/en not_active IP Right Cessation
- 1991-08-28 CN CN91108516A patent/CN1028379C/en not_active Expired - Lifetime
- 1991-09-09 JP JP3256962A patent/JP2922343B2/en not_active Expired - Fee Related
- 1991-09-30 KR KR1019910017086A patent/KR100188324B1/en not_active IP Right Cessation
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| CN102449313B (en) * | 2009-05-29 | 2015-05-20 | 艾默生环境优化技术有限公司 | Compressor having piston assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA2046548A1 (en) | 1992-04-02 |
| CA2046548C (en) | 2002-01-15 |
| MX9100629A (en) | 1992-06-05 |
| EP0479421B1 (en) | 1995-12-13 |
| AU8153991A (en) | 1992-04-02 |
| BR9103456A (en) | 1992-06-16 |
| AU651606B2 (en) | 1994-07-28 |
| DE69115422D1 (en) | 1996-01-25 |
| EP0479421A1 (en) | 1992-04-08 |
| JP2922343B2 (en) | 1999-07-19 |
| KR100188324B1 (en) | 1999-06-01 |
| DE69115422T2 (en) | 1996-05-02 |
| KR920008353A (en) | 1992-05-27 |
| CN1060699A (en) | 1992-04-29 |
| JPH06341387A (en) | 1994-12-13 |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: Ohio, USA Patentee after: Emerson Climate Technologies, Inc. Address before: Ohio, USA Patentee before: EMERSON CLIMATE TECHNOLOGIES, Inc. |
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Expiration termination date: 20110828 Granted publication date: 19950510 |