CN100480513C - Swirl type fluid machinery - Google Patents

Abstract

A swirl fluid machinery is provided, which is provided with limiting components for allowing mismachining tolerance and thermal deformation of a shell and a thrust plate and preventing the plate shaking. A fixed swirl disc (7) and a rotating swirl disc (10) are arranged relatively, an annular thrust plate (17) for bearing thrust load from the rotating swirl disc (10) is arranged in an annular groove (6) of a thrust bearing portion (5) of the shell (1). The radial gaps (S1, S2) are formed between the thrust bearing portion (5) and the thrust plate (17), a plurality of radial moving elastomers (18) of a limiting plate are arranged in the outside gap (S1). Thereby, the dimensional variation and thermal deformation of the thrust bearing portion (5) and the thrust plate (17) are allowed, the shake of plates in the annular groove (6) in a wide temperature range can be restrained.

Description

Convolute-hydrodynamic mechanics

Technical field

The present invention relates to a kind of convolute-hydrodynamic mechanics that for example is applicable to compressors such as air, refrigerant and vacuum pump etc.

Background technique

Generally, thus convolute-hydrodynamic mechanics is by rotating the rotatablely move equipment of the compression of carrying out air, refrigerant etc. and pump action of scroll relative fixed scroll, for example as air compressor (for example with reference to patent documentation 1).

Patent documentation 1

The spy of Japan opens flat 11-336676

The scroll type air compressor of this prior art for example has the housing that forms tubular, interior all side settings of this housing radially inwardly the thrust of outstanding ring-type bear portion.In addition, fixed scroll is set bearing the relative position of portion with thrust on the housing, this fixed scroll is in the upright silver lap portion that is provided with scroll of end sheet surface.

In addition, the driving source that utilizes motor etc. is set and the live axle that is driven in rotation in housing, in the forward end of this live axle the rotation scroll is set, its thrust at housing is born between portion and the fixed scroll.At this moment, the rotation scroll is in the surperficial edge-on silver lap portion that establishes a plurality of scrolls of end plate, and this silver lap portion overlaps with the silver lap portion of fixed scroll, marks off a plurality of pressing chambers.

In addition, the thrust plate that ring-type is set between the portion is born in the rotation end plate of scroll and the thrust of housing, and this thrust plate is configured in and is formed at thrust and bears in the groove of ring-type of portion and with the back side of end plate and slip.At this moment, the thrust of the housing portion of bearing is formed by the bigger metallic material such as aluminium of for example rates of thermal expansion.In addition, thrust plate by punch process for example sheet metal such as iron form, have than thrust and bear the little rates of thermal expansion of portion.

And, during compressor operation, live axle is rotated when driving by motor etc., then rotate scroll to rotatablely move with respect to fixed scroll, thus, the compression indoor air is compressed.At this moment, if from the load of pressing chamber side to rotation scroll applied thrust direction, then this load is born by the thrust portion of bearing of housing by thrust plate.

At this, thrust plate is formed by punch process etc., so its external diameter and internal diameter produce deviation on the size because of machining error etc. easily.In addition, during compressor operation, because the heat that pressing chamber produces is passed to thrust plate, so the easy thermal distortion of thrust plate.Therefore, the groove that portion is born in thrust forms greatlyyer than the outer shape of thrust plate, and the gap radially of the size deviation that the machining error of allowing thrust plate for example, thermal expansion etc. cause is set between the side face of groove and thrust plate.

In above-mentioned prior art, be formed on thrust and bear the gap that is provided with between the groove of portion and the thrust plate radially, allow the structure of the size deviation that the machining error, thermal expansion etc. of plate for example cause.But thrust plate during thermal expansion, does not form big gap radially between plate and groove, produces rocking of thrust plate in this gap easily.

Therefore, in the prior art, for example existing beginning to reach between the preheat mode not the thrust plate of thermal expansion from starting compressor to be rotated the scroll leader tape and to slide in groove inward turning transition bit (dislocation), conflicts repeatedly with the side face of groove and produces the problem of noise in each position of plate.Particularly, when carrying out the running of short time repeatedly off and on, owing to do not reach warming up, so not thermal expansion of thrust plate frequently produces noise, surrounding environment worsens.

Also can consider for example under the normal temperature state, to reduce the method in thrust plate gap on every side to this.But, in this case, touch the side face of groove during the thrust plate thermal expansion and rise, between plate and rotation scroll, produce easily and phenomenon such as block, be directed at their uneven wears, damage etc.

In addition, because the material of thrust plate and be used for thrust and bear different both rates of thermal expansion that make of material of portion difference is arranged greatly, and these parts are to from the conduction state of the heat of rotation scroll conduction also difference.Promptly, for example during compressor start at first thrust plate by directly slipping with the rotation scroll and bear the thermal expansion of elder generation of portion, and with respect to this, behind the warming up than thrust, by the transmission of heat from thrust plate, the thrust portion of bearing that becomes high temperature has than the big rates of thermal expansion of thrust plate expands.Therefore, be difficult to the gap size around the thrust plate is set at the size value that is fit to various operating conditions.

Summary of the invention

The present invention researches and develops in view of the above problems, its purpose is to provide a kind of convolute-hydrodynamic mechanics, wherein, the radial clearance that thrust is born between portion and the thrust plate can be allowed the variation that machining error, thermal expansion etc. cause, and can in wide temperature range, prevent rocking of plate, suppress noise, realize good running environment.

For addressing the above problem, the convolute-hydrodynamic mechanics that first aspect present invention provides, have: the housing of portion is born in the thrust that is provided with the load of bearing thrust direction, the upright fixed scroll of establishing the silver lap portion of scroll on the end plate of being located on this housing, can be arranged on the live axle on the described housing rotatably, can be arranged on the forward end of this live axle rotatably and the upright rotation scroll that overlaps the silver lap portion of the scroll that marks off a plurality of pressing chambers with the silver lap portion of described fixed scroll of establishing on end plate, be arranged on the end plate of this rotation scroll and the thrust of described housing and bear the thrust plate of the ring-type between the portion, it is characterized in that, by the gap that is provided with between the relative parts of week in interior week of described thrust plate and periphery and in and outer periphery with this, only any one party among this gap has the limiting part that the moves formation in the gap of this thrust plate that flexibly limits this gap generation.

The convolute-hydrodynamic mechanics that second aspect present invention provides is characterized in that, described limiting part is arranged on circumferential part, described gap.

In addition, according to the aspect of second aspect, the formation limiting part is filled in the structure in the gap.

The convolute-hydrodynamic mechanics that third aspect present invention provides is characterized in that, a plurality of described limiting parts are provided with along the gap of the outer circumferential side of described thrust plate.

The convolute-hydrodynamic mechanics that fourth aspect present invention provides is characterized in that, the gap along the outer circumferential side of described thrust plate is being provided with a plurality of notchs with circumferentially being separated from each other, and described limiting part is chimeric with described a plurality of notchs respectively.

According to first aspect present invention, for example when convolute-hydrodynamic mechanics during at the normal temperature state, consider machining error, thermal expansion of thrust plate etc., interior week of plate and periphery, with should in guarantee radially big gap between the relative parts of week and outer periphery, even under this state, also can suppress rocking of thrust plate by the elastic force of limiting part.Therefore, the side face that for example can reliably prevent thrust plate when starting machinery contacts with the parts relative with it and produces noise.

In addition,,, there is no need on portion and the thrust plate to process especially etc., so efficient assembly mechanical for the configurable limit parts so bear in thrust because limiting part is arranged on gap portion according to second aspect present invention.And when the thrust plate thermal distortion, limiting part can exist flexibly and limits, and thus, can allow thermal expansion, the thermal shrinkage of plate.In addition, machining error of thrust plate etc. also can be absorbed by the distortion of limiting part.

And then, according to third aspect present invention, can a plurality of limiting parts are chimeric with the notch of thrust plate respectively with the state that is installed in thrust and bears on any one face of the inner peripheral surface of portion or outer circumferential face, by these limiting parts with plate with respect to radially and circumferential (sense of rotation) location.Therefore, for example can prevent thrust plate because of vibration, external force etc. in radial misalignments, or plate is rotated that the scroll leader tape slides and in the sense of rotation dislocation, in the stable gap that forms of the complete cycle of thrust plate.

Description of drawings

Fig. 1 is the sectional arrangement drawing of the scroll type air compressor of expression first mode of execution of the present invention;

Fig. 2 amplifies major component amplification profile among the Fig. 1 that represents thrust plate, elastomer etc.;

Fig. 3 is a front elevation of state left side from Fig. 1 that scroll is pulled down being observed housing;

Fig. 4 is the major component amplification profile that arrow IV-IV direction is seen housing etc. from Fig. 3;

Fig. 5 is the exploded perspective view of the state before expression assemble case, thrust plate and the elastomer;

The explanatory drawing of the state in the gap around the thrust plate when Fig. 6 is expression compressor room temperature state;

The explanatory drawing of the state in the gap around the thrust plate when Fig. 7 is expression preheating operation compressor;

Fig. 8 is the explanatory drawing of the state in the thrust plate gap on every side when moving compressor usually.

Embodiment

Describe the convolute-hydrodynamic mechanics of embodiments of the present invention with reference to the accompanying drawings in detail.

At this, Fig. 1～Fig. 8 represents first mode of execution, in the present embodiment, is that example describes with half oil feeding type scroll type air compressor.

The 1st, the housing of the shell of formation scroll type air compressor, this housing 1 for example is made of metallic material such as aluminium or its alloys, forms the roughly tubular of band ladder.And housing 1 comprises: form the path tubular bearing portion 2, this bearing portion 2 an axial side hole enlargement setting big footpath tube portion 3, bear portion 5 from the integrally formed thrust described later of interior all sides of the outstanding lip portions 4 of a side side direction radially outward of this big footpath tube portion 3, big footpath tube portion 3.

The 5th, portion is born in the radially inwardly outstanding circular thrusts that are provided with in the big footpath of housing 1 tube portion 3, this thrust bear portion 5 as Fig. 2, shown in Figure 3ly have an annular slot 6 that forms at the position relative with rotation scroll described later 10, in this annular slot 6, have gap S1, S2 loose fit (Swam embedding) has thrust plate 17 described later.At this, the part that portion 5 not only refers to bearing thrust is born in thrust, also refers to inner peripheral surface 17D and radially relative parts, the part of outer circumferential face 17C with thrust plate 17.

At this, annular slot 6 forms as the circular groove of axial recess, has outer circumferential face 6A, inner peripheral surface 6B and bottom surface 6C.At this moment, the outer circumferential face 6A of annular slot 6 considers that thrust plate 17 and thrust bear the machining error of portion 5, thermal expansion etc., and the external diameter that forms large diameter-ratio thrust plate 17 is big, forms outer side clearance S1 between the outer circumferential face 17C of this outer circumferential face 6a and thrust plate 17.

In addition, the inner peripheral surface 6B of annular slot 6 considers machining error, thermal expansion etc. equally, forms the footpath littler than the internal diameter of thrust plate 17, side clearance S2 in forming between the inner peripheral surface 17D of this inner peripheral surface 6B and thrust plate 17.And these radial clearances S1, S2 allow size deviation, thermal distortion of thrust plate 17 and housing 1 etc.

In addition, bear in the portion 5 the outer circumferential face 6A that is provided with from annular slot 6 to radially inwardly outstanding for example three teat 5A in thrust.These teats 5A for example is configured in the upside and the left and right sides of annular slot 6, and circumferentially separate for about 90 ° the space.

And, on each teat 5A, be provided as undercut groove 5B respectively with the chimeric circular-arc notch of elastomer described later 18.These undercut groove 5B towards thrust plate 17 described later in radially to opening.At this moment, the side face of teat 5A and undercut groove 5B constitutes the part of the outer circumferential face 6A of annular slot 6.

In addition, the through hole 5C that the band ladder is set in the portion 5 is born in thrust, and it at the bottom surface of annular slot 6 6C opening, respectively installs elastomer 18 on the through hole 5C at these three places in the position of corresponding each undercut groove 5B.And then, in housing 1, bear between the portion 5 and accommodate lubricant oil in big footpath teat 3 and thrust.

The 7th, the fixed scroll of on housing 1, installing, this fixed scroll 7 comprises as shown in Figure 1: forms roughly discoideus end plate 7A, the axially 7B of silver lap portion of the upright scroll of establishing, the lip portions 7D that gives prominence to towards 1 axially extended 7C of portion of housing, from the 7C of this radially outward from the outer circumferential side of end plate 7A in the position that surrounds the 7B of this silver lap portion on the surface of this end plate 7A.

The 8th, for example can be bearing in the live axle of the bearing portion 2 of housing 1 rotatably by two main bearings 9, these live axle 8 terminal sides link at the driving source of the outside of housing 1 and motor (not shown) etc.In addition, the forward end of live axle 8 becomes the bent axle 8A that extends towards fixed scroll 7, and the axis of the axis relative drive shaft 8 of this bent axle 8A is in the dimension delta of radial disbalance regulation.

The 10th, can be arranged on the rotation scroll on the bent axle 8A of live axle 8 rotatably, this rotation scroll 10 is configured in the housing 1, and is relative with fixed scroll 7 axis.And rotation scroll 10 comprises: forms discoideus end plate 10A, from the surface of this end plate 10A axially the 10B of silver lap portion of the upright scroll of establishing, be darted at end plate 10A back side central authorities and can be rotatably and the protuberance 10C of bent axle 8A binding by swivel bearing 11.

At this, the radial outside position of end plate 10A is provided in the thrust of housing 1 and bears between the lip portions 7D of portion 5 and fixed scroll 7, slips with thrust plate 17.In addition, the back side at this radial outside position as shown in Figure 2 for example the recess 10D at three places (only showing a place among the figure) be arranged on the position corresponding with each elastomer 18, these recess 10D prevents end plate 10A and elastomer 18 interference when rotation scroll 10 rotatablely moves.

In addition, the 7B of silver lap portion of the 10B of the silver lap portion relative fixed scroll 7 180 ° of coincidences of for example staggering set, and thus, mark off a plurality of pressing chambers 12 between two 7B of silver lap portion, 10B.

And live axle 8 utilizes motor etc. to be driven in rotation, thereby rotation scroll 10 is rotated motion with respect to fixed scroll 7 with certain turning radius of the dimension delta of corresponding bent axle 8A.Thus, in the scroll type air compressor, air sucks the pressing chamber 12 of most peripheral sides from the suction port 13 of being located at fixed scroll 7, and pressurized air is discharged outside by exhaust port 14 from the pressing chamber 12 of center side.

The 15th, the European ring (オ Le ダ system リ Application グ) between the end plate 10A of portion 5 and rotation scroll 10 is born in the thrust of being located at housing 1.This European ring 15 prevents its rotation when rotation scroll 10 rotatablely moves.

The 16th, be located at the counterweight block on the live axle 8, this counterweight block 16 by with live axle 8 rotation and rotation scroll 10 between obtain spin balancing.At this moment, in the forward end of counterweight block 16 oil dipper 16A is set, this oil dipper 16A gets lubricant oil in the housing 1 bears portion 5, main bearing 9, swivel bearing 11, two sides side etc. from thrust plate 17 to thrust by Sheng lubricant oil is provided.

The 17th, the thrust plate between the end plate 10A of portion 5 and rotation scroll 10 is born in the thrust of being located at housing 1, this thrust plate 17 is as Fig. 4, shown in Figure 5, for example form circular flat board, have surperficial 17A, back side 17B, outer circumferential face 17C and inner peripheral surface 17D by sheet metals such as iron are carried out punch process.

And, thrust plate 17 as Fig. 2, shown in Figure 3ly fit loosely in thrust and bear in the annular slot 6 of portion 5, back side 17B contacts with the bottom surface 6C of annular slot 6.It is relative with the outer circumferential face 6A of annular slot 6 that the outer circumferential face 17C of this state lower thrust plate 17 separates outer side clearance S1, and side clearance S2 was relative with the inner peripheral surface 6B of annular slot 6 in the inner peripheral surface 17D of thrust plate 17 separated.

In addition, thrust plate 17 forms the wall thickness thicker than the depth dimensions of annular slot 6, its surperficial 17A than thrust bear portion 5 when rotation scroll 10 is side-prominent and the back side of end plate 10A slip.Thus, thrust plate 17 bears portion 5 associations with thrust when rotation scroll 10 when rotatablely moving and moves and bear the load that is applied to the thrust direction on the end plate 10A.

In addition, form recess 17E respectively in the position that each teat 5A of portion 5 is born in corresponding thrust as shown in Figure 3 on the outer circumferential face 17C of thrust plate 17, each teat 5A separates gap configuration in these recesses 17E.And then each recess 17E goes up and is bearing the relative radially export-oriented circular-arc undercut groove 17F that offers of position formation of each undercut groove 5B of portion 5 with thrust, and the side face of each recess 17E and undercut groove 17F constitutes the part of the outer circumferential face 17C of thrust plate 17.

And, undercut groove 5B, 17F that portion 5 and thrust plate 17 are born in thrust in the circumferentially spaced arranged spaced at three places, chimeric elastomer 18 described later respectively between each undercut groove 5B, 17F.

The conduct that the thrust that housing 1 is located in 18 expressions is born portion 5 and is configured in outer side clearance S1 is the elastomer 18 of three limiting parts for example, and this elastomer 18 is made of the rubber-like material as Fig. 3～shown in Figure 5, integrally formed band ladder cylindric.

At this, as the rubber-like material is to have to make thrust plate 17 move radially the material that destroys elastic forces such as (self Ga Collapse れ り) or recovery own, for example resin material such as natural rubber, fluorine rubber, silicone rubber, butyl rubber, urethane rubber and other have recuperability and have flexual nonwoven fabric, felt.

And elastomer 18 bears between the undercut groove 17F (outer circumferential face 17C) of the undercut groove 5B (the outer circumferential face 6A of annular slot 6) of portion 5 and thrust plate 17 between thrust.Thus, in each elastomer 18, bear in thrust in the complete cycle scope, form between outer circumferential face 6A, the 17C of portion 5 and thrust plate 17 outside side clearance S1, and side clearance S2 in forming in the complete cycle scope between inner peripheral surface 6B, the 17D remains on the side face 6A from annular slot 6, the position that 6B leaves with thrust plate 17.

In addition, the size of gap S1, S2 considers that the thrust of housing 1 bears the machining error of portion 5 and thrust plate 17, thermal expansion etc., and for example compressor is set big size value in a way for when the normal temperature state.At this moment, what is called considers that the gap S1 of thermal expansion, the size value of S2 are meant, as Fig. 6～shown in Figure 8 for example when the starting of compressor or during warming up, even portion 5 and thrust plate 17 thermal expansions maximum size in the practical application is born in thrust, also can guarantee MIN gap between side face 6A, the 6B of plate and annular slot 6.

And, elastomer 18 is when compressor start for example, even gap S1, S2 form under large-sized state, by the moving and suppress it and rock radially of restriction thrust plates 17 in the annular slot 6, thereby prevent that plate from contacting the generation noise with side face 6A, the 6B of annular slot 6.

In addition, elastomer 18 comprises as shown in Figure 3, Figure 4: thrust bear columned large-diameter portion 18A chimeric respectively on undercut groove 5B, the 17F of portion 5 and thrust plate 17, the circumferential opposite side undergauge of this large-diameter portion 18A form and insert be entrenched in thrust bear minor diameter part 18B in the through hole 5C of portion 5, from the 18C of blade of a sword portion of the outstanding ring-type of another distolateral radially outward of this minor diameter part 18B.

And in the elastomer 18, large-diameter portion 18A is clamped between undercut groove 5B, the 17F with state that can resiliently deformable, is installed in thrust by large-diameter portion 18A and the 18C of blade of a sword portion with the state of anticreep in through hole 5C and bears in the portion 5.In addition, elastomer 18 for example is configured in the upside and the left and right sides of thrust plate 17, and the space is circumferentially being left for about 90 °, and about elastomer 18 relative in the diametric(al) of thrust plate 17.

Like this, each elastomer 18 is entrenched in respectively on the undercut groove 17F radially of thrust plate 17, and elasticity supports plate, and it is surrounded this plate at three circumferential places from the outside, and thus with thrust plate 17 with respect to radially and circumferential (sense of rotation) location.

And when thrust plate 17 thermal expansions, the large-diameter portion 18A of elastomer 18 has flexibly distortion between undercut groove 5B, 17F, becomes the thermal distortion of following thrust plate 17 and destroys the state of (Collapse れ Ru) diametrically.Identical therewith, even when for example there is machining error in thrust plate 17, also can be by elastomer 18 distortion absorption errors.Thus, elastomer 18 is allowed size distortion, thermal distortion of thrust plate 17 etc., prevent plate radially and the rocking of sense of rotation.

The scroll type air compressor of present embodiment has aforesaid structure.Below its action is described.

At first, when compressor is assembled, for example the 18C of blade of a sword portion of elastomer 18 is inserted with the state of undergauge direction resiliently deformable and be entrenched in thrust and bear in the through hole 5C of portion 5, reset into original external diameter by the back side that makes the 18C of blade of a sword portion bear portion 5, bear portion 5 thereby elastomer 18 is installed in thrust simply in thrust.

Then, when compressor operating, drive live axle 8 by rotation such as motor, then rotate scroll 10 and be rotated motion with the turning radius of dimension delta, air outside sucks the pressing chamber 12 of most peripheral sides from suction port 13.Then, this air is compressed in turn towards the pressing chamber 12 of center side, becomes pressurized air and is discharged to (not shown) such as air outside jars from exhaust port 14.

In addition, during compressor operating, the pressure in the pressing chamber 12 become the load action that makes on the direction (thrust direction) that rotation scroll 10 leaves from fixed scroll 7 in end plate 10A.The load of this thrust direction bears portion 5 by the thrust of thrust plate 17 and housing 1 and bears, so rotation scroll 10 can be carried out compressed action with what slip with fixed scroll 7 in stable conditionly.

At this moment, on the thrust plate 17 by and the frictional resistance of rotation between the scroll 10 applies radially and the external force of sense of rotation.But thrust plate 17 radially and on the sense of rotation is being located with the state that separates gap S1, S2 between side face 6A, the 6B of annular slot 6 by each elastomer 18 yielding support.Thus, can prevent reliably that thrust plate 17 from contacting with side face 6A, 6B or the plate generation is rocked.

In addition, during the compression operation, the heat that pressing chamber 12 produces is passed to thrust plate 17 via rotation scroll 10.At this moment, thrust plate 17 is the interior free thermal expansion of the scope of side clearance S1 (or interior side clearance S2) outside, thermal shrinkage by the resiliently deformable of elastomer 18, can avoid side face 6A, the 6B of plate and annular slot 6 to interfere.

The relation of the size value of the running state of compressor and gap S1, S2 then is described with reference to Fig. 6～Fig. 8.

At first, when compressor stops, as shown in Figure 6, form outer side clearance S1 under room temperature state, form interior side clearance S2 with size r in interior all sides of thrust plate 17 with size R at the outer circumferential side of thrust plate 17.

Under this state, during starting compressor, rotatablely move by rotation scroll 10 that air is compressed pressing chamber 12 in, the heat of compression at this moment etc. is passed to and is rotated the thrust plate 17 that scroll 10 is slipped.Therefore, thrust plate 17 temperature are born rising earlier such as portion's 5 grades and thermal expansion than the thrust of housing 1.

As a result, as shown in Figure 7,,, become size R ' (R〉R ') so outer side clearance S1 dwindles because the external diameter of thrust plate 17 becomes big.Like this, during the starting of compressor (during preheating operation) because the thermal expansion of thrust plate 17 is dwindled outer side clearance S1, so even the size R of the outer side clearance S1 under the room temperature state set for can the vanishing degree owing to this thermal expansion size R ' yet size.Become big and the size of interior side clearance S2 is temporary transient by the thermal expansion of thrust plate 17.

Then, when after the compressor start through adequate time after, heat is passed to thrust from thrust plate 17 and is born portion 5, these parts become roughly the same temperature, reach temperature equilibrium.At this moment, thrust is born portion 5 and is formed by big aluminium of rates of thermal expansion etc., and thrust plate 17 is formed by smaller iron of rates of thermal expansion etc., so that portion's 5 thermal expansions are born in thrust is big.

Therefore,, thrust expands with respect to thrust plate 17 relatively hots as shown in Figure 8 because bearing portion 5 (annular slot 6), the inner peripheral surface 6B enlarged-diameter of annular slot 6, and interior side clearance S2 dwindles, and becomes size r ' (r〉r ').Therefore, (behind the warming up) was because thrust is born the thermal expansion of portion 5 and interior side clearance S2 dwindles, so the also size of the degree of not vanishing of this thermal expansion size r ' occurs even the size r of the interior side clearance S2 of room temperature state is set at when compressor turned round usually.It is big when in addition, the thermal expansion of bearing portion 5 owing to thrust of the size of outer side clearance S1 becomes than warming up.

Like this, when moving and common situation separately during operation about compressor preheating, by considering that thrust bears the heat expands state of portion 5 and thrust plate 17, and the size of the gap S1, the S2 that form between this suitably can be set, compressor is moved swimmingly.

And, according to present embodiment, forming thrust and bear the structure that elastomer 18 is set between the annular slot 6 of portion 5 and the thrust plate 17, elastomer 18 can bear gap S1, the S2 that forms between the portion 5 radially in side face 17C, 17D and the thrust of plate.

Therefore, for example when compressor during at the normal temperature state, consider that thrust bears the structural failure of portion 5 and thrust plate 17, thermal expansion etc., can guarantee that side face 17C, the 17D of plate and thrust bear between the portion 5 big gap S1, S2 radially, under this state, rocking of thrust plate 17 can be suppressed by elastomer 18.Therefore, for example can prevent reliably that when compressor start side face 17C, the 17D of plate and thrust bear portion 5 and contact and produce noise.

In addition, when the temperature of thrust plate 17 rose, side face 17C, the 17D of plate and thrust were born between the portion 5 elastomer 18 and can be had elasticity and be out of shape (flexible), and thus, thrust plate 17 can free thermal expansion in the scope of gap S1, S2, thermal shrinkage.Therefore, even for example during the compressor long-play, the thrust plate 17 that also can prevent thermal expansion bears portion 5 with thrust and elastomer 18 is interfered.

And when thrust plate 17 heats of cooling were shunk, elastomer 18 can reset into previous condition rapidly, so rocking can suppress thermal shrinkage the time always can be stablized around thrust plate 17 and be guaranteed gap S1, S2.Therefore, can allow the thermal distortion (thermal expansion, thermal shrinkage) of thrust plate 17, and can in wide temperature range, prevent rocking of plate, realize the good running environment of low noise.

And, by for example using elastomer 18 such as rubber as limiting part, can yielding support thrust plate 17, can be with respect to for example vibration, external force etc. stably to thrust plate 17 location.

In addition, bear on portion 5 and the thrust plate 17 in thrust and undercut groove 5B, 17F to be set in circumferential a plurality of positions, between these undercut groove 5B, 17F, elastomer 18 is set respectively, each elastomer 18 can be born on each the undercut groove 17F that is entrenched in thrust plate 17 under the state of portion 5 to be installed in thrust.

Thus, thrust plate 17 can be supported on circumferential a plurality of position stabilities ground, with plate with respect to radially and the sense of rotation stable position.Therefore, for example can prevent thrust plate 17 on sense of rotation, can on the complete cycle of thrust plate 17, stablize formation gap S1, S2 because vibration, external force are isometrical is rotated scroll 10 leader tapes to dislocation or plate and slides and misplace.

In addition, in above-mentioned first mode of execution, form the structure as limiting part such as the elastomer 18 that uses rubber.But limiting part of the present invention is not limited to the rubber-like material, and various materials with recuperability can use.

In addition, in first mode of execution, three places that form the outer circumferential side of thrust plate 17 dispose the structure of the elastomer 18 of needle-like.But the number of limiting part of the present invention, configuration etc. are not limited to present embodiment, for example also can form the structure of two of uses, four or more limiting part.

In addition, elastomeric shape for example forms the elongated frame shape that buries gap S1, S2, sheet, band shape etc., by it is embedded thrust plate 17 around, form the structure of for example using a limiting part.

In addition, in first mode of execution, be formed on the structure of the outer circumferential side configuration elastomer 18 of thrust plate 17.But, the invention is not restricted to this, (interior side clearance S2) configuration elastomer 18 between the inner peripheral surface 6B that for example also can form at annular slot 6 and the inner peripheral surface 17D of thrust plate 17 is from the structure of inboard supporting thrust plate 17.And then many positions of surperficial 17A that also can be formed on thrust plate 17 are provided with not shown through hole, bear the structure that elastomer 18 is set between the portion 5 at this through hole and thrust.

In addition, in the mode of execution, the end plate 10A that formation will be rotated scroll 10 forms discoideus, the structure of slipping thrust plate 17 at the back side of end plate 10A.But, the invention is not restricted to this, for example also can be to open flat 7-189930 communique etc. as the spy to put down in writing, the structure that the forward end of cooling fin in the convolute-hydrodynamic mechanics of form of cooling fin is slipped thrust plate promptly is set at the back side of the end plate of rotation scroll.And then also can be the rotation scroll end plate by the surface upright establish the discoideus end plate main body of silver lap portion, the retaining plate of installing at the upright cooling fin of establishing in the back side of this end plate main body, the front end of this cooling fin constitutes, the structure that thrust plate for example slips with the back side of retaining plate.

In addition, the structure that gap S1, S2 are set between portion 5 and the thrust plate 17 is born in the thrust that forms housing 1 in the mode of execution.But, the invention is not restricted to this, for example, be used for and thrust plate 17 between form gap S1, S2 parts also can be fixed scroll 7 and housing 1.

In addition, in the mode of execution, be that example is illustrated with the scroll type air compressor as convolute-hydrodynamic mechanics.But, the invention is not restricted to this, for example also can be other convolute-hydrodynamic mechanics such as the refrigerant cold medium compressor that comprises compression refrigerant, high-altitude pump.

Claims (4)

1. convolute-hydrodynamic mechanics, it has: the housing of portion is born in the thrust that is provided with the load of bearing thrust direction, be located on this housing and the upright fixed scroll of establishing the silver lap portion of scroll on end plate, can be arranged on the live axle on the described housing rotatably, can be arranged on the forward end of this live axle rotatably and the upright rotation scroll of silver lap portion that overlaps and mark off the scroll of a plurality of pressing chambers with the silver lap portion of described fixed scroll of establishing on end plate, be arranged on the end plate of this rotation scroll and the thrust of described housing and bear the thrust plate of the ring-type between the portion, it is characterized in that

By interior week of described thrust plate and periphery, with should in the gap that is provided with between the relative parts of week and outer periphery and only any one party among this gap have the mobile limiting part radially that flexibly limits this thrust plate that this gap produces and constitute.

2. convolute-hydrodynamic mechanics as claimed in claim 1 is characterized in that, described limiting part is arranged on circumferential part, described gap.

3. convolute-hydrodynamic mechanics as claimed in claim 2 is characterized in that, a plurality of described limiting parts are provided with along the gap of the outer circumferential side of described thrust plate.

4. convolute-hydrodynamic mechanics as claimed in claim 3 is characterized in that, the gap along the outer circumferential side of described thrust plate is being provided with a plurality of notchs with circumferentially being separated from each other, and described limiting part is chimeric with described a plurality of notchs respectively.

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