CN206206173U - The thrust component and rotary compressor of rotary compressor - Google Patents

Abstract

The utility model discloses the thrust component and rotary compressor of a kind of rotary compressor.Thrust component includes：Supplementary bearing and mobilizable thrust ring.Supplementary bearing has countershaft bearing bore, and the annular groove of countershaft bearing bore setting is provided around on the end face of supplementary bearing.Thrust ring is located in annular groove, and gap coordinates between thrust ring and annular groove, and bent axle is suitable to only be against on the end face of thrust ring.According to thrust component of the present utility model, by setting annular groove and mobilizable thrust ring structure on supplementary bearing, compressor thrust surface wear can be effectively reduced, lift compressor reliability.

Description

The thrust component and rotary compressor of rotary compressor

Technical field

The utility model is related to compressor field, thrust component more particularly, to a kind of rotary compressor and rotary Compressor.

Background technology

With the appearance of rotary compressor small axle diameter trend and parts VA demands, the pump housing starts to occur rigid body and weakens Gesture, the problem for causing crankshaft wear abnormal is gradually highlighted, and shoulder of crank thrust abrasion is exactly one of importance.

The shaft shoulder thrust structure of existing rotary compressor, bent axle is spacing by metal (upper, bent axle, rotor and balance weight Shafting structure weight all rely on bent axle countershaft thrust surface support.Using such thrust structure, numerous vats it is high and Easily there is thrust surface inordinate wear under durable operating mode in twin-tub machine.

For having developed machine, on the premise of crankshaft structure finalizes the design almost, it is desirable to improved only by optimizing bent axle rigidity Pushing surface abrasion is difficult to realize.In order to improve thrust abrasion, prior art occurs in that the change skill from shaft shoulder thrust to shaft end thrust A kind of art, this actually design of compromising, this design of compromising brings the problem of three aspects：One is that shaft end thrust structure easily occurs Thrust noise；Two is that shaft end thrust need to set up thrust plate and muffler pad, and cost increases；Three be because with existing shaft shoulder thrust machine Plant structure different, standardization issue can be brought.

Also occur in that one kind sets internal circle groove on supplementary bearing in the prior art, thrust plate insertion is then fixed on internal circle groove It is interior, with the design of thrust plate thrust bearing.But the insertion of this set thrust plate is fixed on the design in internal circle groove, is ground reducing Effect is not too much preferable in damage.

Utility model content

The application aims to solve the problem that one of technical problem present in prior art.Therefore, the utility model aims to provide one The thrust component of rotary compressor is planted, the thrust component can effectively reduce compressor thrust surface wear.

Another purpose of the present utility model is to provide a kind of rotation of the thrust component with above-mentioned rotary compressor Rotary compressor.

Thrust component according to rotary compressor of the present utility model, the rotary compressor includes bent axle, described Bent axle includes the main shaft section, eccentric segment and the countershaft section that set gradually vertically, and the thrust component includes：Supplementary bearing, the pair Bearing has countershaft bearing bore, and the annular groove that the countershaft bearing bore is set, the countershaft are provided around on the end face of the supplementary bearing The countershaft section is adapted for engagement with bearing bore to support the crank rotation；Mobilizable thrust ring, the thrust ring is located at described In annular groove, gap coordinates between the thrust ring and the annular groove, and the bent axle is suitable to only be against the end of the thrust ring On face.

The thrust component of the rotary compressor according to the utility model embodiment, by setting annular groove on supplementary bearing And mobilizable thrust ring structure, compressor thrust surface wear can be effectively reduced, lift compressor reliability.

In certain embodiments, annular is limited between the internal perisporium of the internal perisporium of the annular groove and the countershaft bearing bore Boss, the height of the annular boss is H1, and the depth of the annular groove is H2, and H1 ＜ H2.

Specifically, the height of the thrust ring is H, and H ＞ H1.

In further embodiments, the annular groove is open upwards towards the side of the countershaft bearing bore.

Specifically, the height of the thrust ring is depth Hs 2 of the H less than or equal to the annular groove.

Further, piston radial minimum seal distance meets following relation：P2-D2-2*e >=4mm, wherein, the ring Shape flute profile turns into the annular coaxial with the countershaft bearing bore, and the external diameter of the annular groove is D2, the rotary compressor The external diameter of piston is P2, and the offset of the bent axle is e.

Alternatively, the thrust ring is formed as annular.

Alternatively, the thrust ring includes the first annulus section and the second annulus section, and second annulus section is from described first The part internal perisporium of annulus section is radially inwardly extending, and the first annulus section is located in the annular groove, second annulus Duan Peihe is on the annular boss.

According to rotary compressor of the present utility model, including：Bent axle, bent axle includes the main shaft for setting gradually vertically Section, eccentric segment and countershaft section；Thrust component, the thrust component is stopping according to rotary compressor described in the utility model Component is pushed away, the countershaft section is combined with the countershaft bearing bore to support the crank rotation.

According to the rotary compressor of the utility model embodiment, compressor thrust surface wear can be effectively reduced, be lifted Compressor reliability.

Specifically, the bent axle also includes the thrust section between the eccentric segment and countershaft section, the thrust Section has the thrust surface being only against on the thrust ring, and the radius of turn of the thrust surface is cylindrical less than or equal to the thrust ring Radius.

Additional aspect of the present utility model and advantage will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined Become substantially and be readily appreciated that, wherein：

Fig. 1 is the assembling section of the bent axle according to the utility model embodiment and thrust component；

Fig. 2 is the thrust component and the structural representation of piston according to the utility model embodiment；

Fig. 3 is the structure chart of the supplementary bearing according to the utility model embodiment one；

Fig. 4 is the structure chart of the thrust ring according to the utility model embodiment one；

Fig. 5 is the structure chart of the thrust component according to the utility model embodiment one；

Fig. 6 is the structure chart of the thrust component according to the utility model embodiment two；

Fig. 7 is the structure chart of the thrust component according to the utility model embodiment three.

Reference：

Bent axle 1, main shaft section 11, eccentric segment 12, thrust section 13, countershaft section 14,

Thrust component 2,

Supplementary bearing 21, countershaft bearing bore 211, annular groove 212, annular boss 213,

Thrust ring 22, the first annulus section the 221, second annulus section 222,

Piston 3,

Piston inner diameter P1, piston external diameter P2, annular groove internal diameter D1, annular groove outer diameter D 2, annular boss height H1, annular groove Depth H 2, thrust ring height H, thrust ring internal diameter D3, thrust ring outer diameter D 4, crankshaft eccentric amount e, minimum seal distance δ, supplementary bearing The diameter d in hole.

Specific embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng The embodiment for examining Description of Drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.

The thrust component 2 of the rotary compressor according to the utility model embodiment is described below with reference to Fig. 1-Fig. 7.Its In, as shown in figure 1, rotary compressor includes bent axle 1, bent axle 1 includes the main shaft section 11, eccentric segment 12 for setting gradually vertically With countershaft section 14, respectively positioned at the two ends of eccentric segment 12, main shaft section 11 is used for and rotary compression for main shaft section 11 and countershaft section 14 The base bearing of machine coordinates, and countershaft section 14 is used to coordinate with the supplementary bearing 21 of rotary compressor.

The thrust component 2 of the rotary compressor according to the utility model embodiment, as shown in figure 1, thrust component 2 is wrapped Include：Supplementary bearing 21 and mobilizable thrust ring 22, supplementary bearing 21 have countershaft bearing bore 211, and the end face of supplementary bearing 21 is provided with ring Countershaft section 14 is adapted for engagement with the annular groove 212 that countershaft bearing bore 211 is set, countershaft bearing bore 211 to support bent axle 1 to rotate.Only Throw-out collar 22 is located in annular groove 212, and gap coordinates between thrust ring 22 and annular groove 212, and bent axle 1 is suitable to only be against thrust ring 22 End face on.Here, bent axle 1 has thrust surface, and the thrust surface of bent axle 1 stops and being against on thrust ring 22, and thrust ring 22 is used for bent axle 1 Axial thrust.

There is also in the prior art on supplementary bearing set annular groove design, then the thrust surface of bent axle stop to In annular groove.The utility model embodiment by comparison, is not only provided with thrust ring 22, and thrust ring in annular groove 212 Gap coordinates between 22 and annular groove 212, therefore thrust ring 22 is mobilizable in annular groove 212, and thrust ring 22 can be with song Axle is rotated.

Explanation is needed exist for, after motion of the inventor to bent axle carries out simulation analysis, is found out by analysis result, not The whole thrust surface of bent axle bears axial load, therefore it has been recognised by the inventors that merely using the method for increasing thrust area not Thrust abrasion can necessarily be improved.Causing the main cause of crankshaft thrust surface wear is, bent axle can be produced under gas pressure difference effect Flexural deformation, crankshaft thrust face is inclined after bending, causes crankshaft thrust face to produce face pressure with the working face of supplementary bearing.Do not considering On the premise of oil film and turned-down edge, reducing thrust surface radius of turn can effectively reduce thrust face pressure.

The setting of ring channel structures on supplementary bearing, advantageously reduces countershaft face pressure so as to reduce the abrasion of countershaft root, but On the one hand setting for ring channel structures reduce the originally limited Area of bearing of thrust surface；On the other hand it is to realize crankshaft thrust face With effective support of supplementary bearing working face, the maximum radius of turn of thrust surface have to be larger than annular groove maximum outside diameter, and this is just limited The design of small size thrust surface.Based on above reason, the presence of traditional endless groove is likely to cause that thrust surface wear deteriorates.

And the thrust component 2 of the rotary compressor of the utility model embodiment, by setting annular on supplementary bearing 21 Groove 212, and mobilizable thrust ring 22 is set in annular groove 212 only to support bent axle 1, can have the advantage that：1st, compressor During operation, bent axle 1 is subject to the gas pressure effect of the transmission of piston 3, and the annular groove 212 of reservation may be used to alleviate countershaft face pressure, because This function of remaining annular groove 212 on supplementary bearing 21 effectively reduces the abrasion of countershaft root；2nd, crankshaft thrust face is due to inclining Deformation produces face pressure, because thrust surface radius of turn is small, causes face pressure smaller, thus filled up that annular groove 212 brings only Pushing surface Area of bearing loses, while can realize that thrust surface radius of turn reduces design, reduces thrust face pressure；3rd, mobilizable thrust Ring 22 is acted on due to the rotation of its own, and the relative sliding velocity of thrust surface friction pair can reduce, so as to reduce thrust ring 22 Abrasion, i.e., acted on using the rotation of mobilizable thrust ring 22, further alleviates thrust surface wear.

To sum up, the thrust component 2 of the rotary compressor according to the utility model embodiment, by setting above-mentioned annular groove 212 and the structure of mobilizable thrust ring 22, compressor thrust surface wear can be effectively reduced, lift compressor reliability.

It is further to note that the groove width of annular groove 212 is little on reduce rigidity influence, therefore to reduce annular groove The 212 thrust space wastages for bringing, annular groove 212 is more narrow better in theory.Here, the groove width of annular groove 212 refers to annular The size diametrically of groove 212, such as groove width of Fig. 2 intermediate annular grooves 212 are (D2-D1)/2.The groove width of annular groove 212 it is narrower, it is necessary to Milling cutter size it is smaller, cutter life is shorter, due to this processing technology limitation, annular groove 212 process when groove width it is typically unilateral Not less than 1.5-2mm.

Due to thrust ring 22 is designed into movable in the utility model embodiment, the thrust of bent axle 1 is all by that can live Dynamic thrust ring 22 completes, it is to avoid increase the reduction of thrust area after annular groove 212.Therefore in this design, annular groove 212 (D2-D1) can be as far as possible big, as long as meeting the minimum seal distance of piston 3.Wherein, the internal diameter of annular groove 212 is D1, ring The external diameter of shape groove 212 is D2.

For the requirement of the minimum seal distance of piston 3, the utility model have following preferably piston 3 radially minimum sealing away from From meeting following relation：P2-D2-2*e >=4mm, i.e. D2≤P2-2*e-4mm.Wherein, the external diameter of the piston 3 of rotary compressor It is P2, the offset of bent axle 1 is e.

Specifically, when piston 3 moves to position as shown in Figure 2, in Fig. 2 at the position of δ signs, the periphery of piston 3 Gap between the outer peripheral face of face and annular groove 212 is minimum, and the gap is the radially minimum seal distance δ of piston 3.By above-mentioned After size design is any limitation as, δ meets relational expression：I.e. radially minimum seal distance will not for piston 3 Less than 2mm.Limited by the outer diameter D 2 to annular groove 212, thus ensure piston 3 when rotating countershaft bearing bore 211 or Annular groove 212 is not connected with compression chamber, it is to avoid compression release.

In addition, can be seen that the inner circumferential of thrust ring 22 and annular groove 212 in the utility model embodiment by Fig. 1 and Fig. 2 It is that gap coordinates between wall and periphery wall, thrust ring 22 can be activity in annular groove 212.Wherein, thrust ring 22 Height H is not less than the cell wall downside of annular groove 212 highly, and the height H of thrust ring 22 is not more than the depth of annular groove 212.Bent axle 1 is complete Depending on mobilizable thrust ring 22 entirely carries out axial thrust.Here, the height H of thrust ring 22 refers to thrust ring 22 in axial direction On full-size, the depth of annular groove 212 refers to full-size of the annular groove 212 in the axial direction of supplementary bearing 21.

The structure according to thrust component 2 in three of the present utility model different embodiments is described below with reference to Fig. 3-Fig. 7.

Embodiment one：Fig. 3-Fig. 5 illustrates the structure of thrust component 2 in embodiment one.Wherein, Fig. 3 shows supplementary bearing 21 structure, Fig. 4 shows the structure of thrust ring 22, and Fig. 5 shows the structure that thrust ring 22 is assembled on supplementary bearing 21.

Specifically, as shown in figure 3, supplementary bearing 21 is provided with countershaft bearing bore 211, the operative end surface of supplementary bearing 21 (i.e. countershaft Hold 21 end face with the fitted seal of piston 3) annular groove 212 is provided with, annular groove 212 is formed as coaxial with countershaft bearing bore 211 Annular.Wherein, the internal diameter D1 of annular groove 212 is more than the diameter d of countershaft bearing bore 211, therefore, the internal perisporium of annular groove 212 Annular boss 213 is limited and the internal perisporium of countershaft bearing bore 211 between.

Here, the madial wall of annular groove 212 is highly H1, and the height of annular boss 213 is H1, and the depth of annular groove 212 is H2, and H1 ＜ H2.In embodiment one, radially minimum seal distance meets following relation to piston 3：P2-D2-2*e≥4mm.

As shown in figure 4, thrust ring 22 forms annular, thrust ring 22 is projected as rectangle on the section for crossing axis.Thrust The interior diameter of ring 22 is D3, and the overall diameter of thrust ring 22 is D4, and the height of thrust ring 22 is H.

As shown in figure 5, when thrust ring 22 is assembled on supplementary bearing 21, meeting：H1<H≤H2, D3>D1, D4<D2.This In, the depth H 2 of the height H≤annular groove 212 of thrust ring 22 so that the upper surface of mobilizable thrust ring 22 is not higher than supplementary bearing 21 operative end surface, so as to ensure the axial seal of piston 3 and the operative end surface of supplementary bearing 21.

In embodiment one, gap coordinates between annular groove 212 and thrust ring 22, and height H is big for mobilizable thrust ring 22 In annular groove 212 inwall downside height H1 and less than the depth H 2 of annular groove 212.Bent axle 1 places one's entire reliance upon movable thrust ring 22 Form axial thrust.During compressor operating, when bent axle 1 is subject to the gas pressure of the transmission of piston 3 to act on, the annular groove 212 of reservation Function is used to alleviate countershaft face pressure；The thrust surface of bent axle 1 produces face pressure due to inclination and distortion, because thrust surface radius of turn is small, from And face pressure is smaller, in addition, movable thrust ring 22 is acted on due to the rotation of its own, the relative sliding velocity of thrust surface friction pair Can reduce, so as to reduce the abrasion of thrust ring 22.

Embodiment two：Fig. 6 illustrates the structure of thrust component 2 in embodiment two.In embodiment two, the knot of supplementary bearing 21 Structure can be identical with the structure of supplementary bearing 21 in embodiment one, and the structure of supplementary bearing 21 is repeated no more here.

Except that, in embodiment two, thrust ring 22 includes the first annulus section 221 and the second annulus section 222, second Annulus section 222 is radially inwardly extending from the part internal perisporium of the first annulus section 221, and the first annulus section 221 is located at annular groove 212 Interior, the second annulus section 222 coordinates on annular boss 213, and thrust ring 22 is projected as L-shaped in one side on the section for crossing axis.This Sample can increase the contact area of the thrust surface of bent axle 1 and thrust ring 22, reduce further thrust face pressure.

In embodiment two, for gap coordinates between annular groove 212 and thrust ring 22, mobilizable thrust ring 22 is T-shaped Structure, the height H of thrust ring 22 is more than the inwall downside height H1 of annular groove 212 and less than the depth H 2 of annular groove 212.Bent axle 1 is complete Movable thrust ring 22 is depended on to form axial thrust.During compressor operating, when bent axle 1 is subject to the gas force of the transmission of piston 3 to act on, The function of annular groove 212 of reservation is used to alleviate countershaft face pressure；The thrust surface of bent axle 1 produces face pressure due to inclination and distortion, due to thrust Face radius of turn is small, so that face pressure is smaller.In addition, movable thrust ring 22 is acted on due to the rotation of its own, thrust surface friction Secondary relative sliding velocity can reduce, so as to reduce the abrasion of thrust ring 22.

Embodiment three：Fig. 7 illustrates the structure of thrust component 2 in embodiment three.In embodiment three, annular groove 212 exists It is open upwards towards the side of countershaft bearing bore 211, annular groove 212 only has overall diameter D2, the depth of annular groove 212 is H2, thrust ring The depth H 2 of 22 height H≤annular groove 212 so that the upper surface of mobilizable thrust ring 22 is not higher than the working end of supplementary bearing 21 Face, so as to ensure the axial seal of piston 3 and the operative end surface of supplementary bearing 21.

In embodiment three, annular groove 212 can also constitute gap cooperation and thrust ring 22 between, wherein mobilizable thrust The height H of ring 22 is not more than the depth H 2 of annular groove 212.Bent axle 1 place one's entire reliance upon movable thrust ring 22 formed axial thrust.Compression When machine runs, when bent axle 1 is subject to the gas force of the transmission of piston 3 to act on, the thrust surface of bent axle 1 produces face pressure due to inclination and distortion, by It is small in thrust surface radius of turn, so that face pressure is smaller, in addition, movable thrust ring 22 is acted on due to the rotation of its own, thrust The relative sliding velocity of face friction pair can reduce, so as to reduce the abrasion of thrust ring 22.

To sum up, in the above-described embodiments, annular groove 212 is preferably the annular coaxial with countershaft bearing bore 211, thrust ring 22 It is also preferred that annular.Certainly, in the utility model embodiment, also it is not excluded for fitting the shape of annular groove 212 and thrust ring 22 The change of answering property, as long as thrust ring 22 is rotatable in annular groove 212.

The structure of the rotary compressor according to the utility model embodiment is described referring to Fig. 1-Fig. 7.

According to the rotary compressor of the utility model embodiment, as shown in figure 1, including：Bent axle 1 and thrust component 2, it is bent Axle 1 includes the main shaft section 11, eccentric segment 12 for setting gradually vertically and countershaft section 14.Thrust component 2 is according to the utility model Countershaft section 14 is combined with the thrust component 2 of the rotary compressor described in above-described embodiment, countershaft bearing bore 211 to support bent axle 1 rotates.The structure of thrust component 2 by being illustrated in above-described embodiment, is repeated no more here.

Due to setting the thrust component 2 described in above-described embodiment, therefore according to the rotary pressure of the utility model embodiment Contracting machine, can effectively reduce compressor thrust surface wear, lift compressor reliability.

Specifically, four parts are mainly included in rotary compressor：Motor, compression mechanism, housing and reservoir.It is wherein electric Owner will include stator component and rotor part, and stator component is fixed in housing, and the axial two ends of rotor part are settable to be had Certain air gap is formed between balance weight, and rotor part and stator component to be circulated with supplied gas.Compression mechanism is located in housing, pressure Contracting mechanism mainly includes bent axle 1, muffler, base bearing, cylinder, supplementary bearing 21, slide plate and rolling piston 3 etc..Rotary compression In machine, the principle of motor and compression mechanism has been well known to those of ordinary skill in the art, and I will not elaborate.

Specifically, bent axle 1 also includes the thrust section 13 between eccentric segment 12 and countershaft section 14, and thrust section 13 has only It is against the thrust surface on thrust ring 22, the exradius of the radius of turn less than or equal to thrust ring 22 of thrust surface.

Here, as shown in figure 1, the lower surface of thrust section 13 constitutes crankshaft thrust face, the radius of turn of thrust surface is equal to only Ultimate range L between the rotation axis of each point and bent axle 1 in pushing surface.L less than or equal to thrust ring 22 exradius D4/2, i.e., with The maximum rotating diameter of the thrust surface of bent axle 1 that movable thrust ring 22 coordinates is not more than D4, and such bent axle 1 can place one's entire reliance upon can The axially support of dynamic thrust ring 22, and crankshaft thrust face area can be made full use of to reduce thrust face pressure.Certainly, the utility model reality Apply scheme of the radius of turn more than the exradius of thrust ring 22 that thrust surface is also not excluded in example, if ensure thrust surface with it is secondary Bearing spacer is opened.

According to the rotary compressor of the utility model embodiment, during compressor operating, bent axle 1 is subject to the transmission of piston 3 Gas pressure is acted on, and the annular groove 212 of reservation may be used to alleviate countershaft face pressure, effectively reduces the abrasion of countershaft root；Fill up The thrust surface Area of bearing loss that annular groove 212 brings, while can realize that thrust surface radius of turn reduces design, reduces thrust surface Pressure；Mobilizable thrust ring 22 is acted on due to the rotation of its own, and the relative sliding velocity of thrust surface friction pair can reduce, and enter one Step alleviates thrust surface wear.

In description of the present utility model, it is to be understood that term " " center ", " height ", " depth ", " on ", D score, The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " axial direction ", " radial direction ", " circumference " It is, based on orientation shown in the drawings or position relationship, to be for only for ease of description the utility model and simplify description, without referring to Show or imply that the device or element of meaning with specific orientation, with specific azimuth configuration and operation, therefore must can not be managed Solution is to limitation of the present utility model.

In description of the present utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " company Connect ", " fixation " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of element internal or two interaction relationships of element.For the ordinary skill in the art, can be specific Situation understands concrete meaning of the above-mentioned term in the utility model.

In the description of this specification, the description of reference term " embodiment ", " example " etc. mean to combine the embodiment or Specific features, structure, material or the feature that example is described are contained at least one embodiment of the present utility model or example. In this manual, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.And, description Specific features, structure, material or feature can in an appropriate manner be tied in one or more any embodiments or example Close.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： In the case where principle of the present utility model and objective is not departed from various changes, modification, replacement can be carried out to these embodiments And modification, scope of the present utility model limits by claim and its equivalent.

Claims (10)

1. a kind of thrust component of rotary compressor, the rotary compressor includes bent axle, and the bent axle is included vertically Main shaft section, eccentric segment and the countershaft section for setting gradually, it is characterised in that the thrust component includes：

Supplementary bearing, the supplementary bearing has countershaft bearing bore, the countershaft bearing bore is provided around on the end face of the supplementary bearing and is set Annular groove, countershaft section is adapted for engagement with the countershaft bearing bore to support the crank rotation；

Mobilizable thrust ring, the thrust ring is located in the annular groove, gap between the thrust ring and the annular groove Coordinate, the bent axle is suitable to only be against on the end face of the thrust ring.

2. the thrust component of rotary compressor according to claim 1, it is characterised in that the internal perisporium of the annular groove Annular boss is limited and the internal perisporium of the countershaft bearing bore between, the height of the annular boss is H1, the annular groove Depth is H2, and H1 ＜ H2.

3. the thrust component of rotary compressor according to claim 2, it is characterised in that the height of the thrust ring is H, and H ＞ H1.

4. the thrust component of rotary compressor according to claim 1, it is characterised in that the annular groove is towards institute The side for stating countershaft bearing bore is open upwards.

5. the thrust component of rotary compressor according to claim 1, it is characterised in that the height of the thrust ring is Depth Hs 2 of the H less than or equal to the annular groove.

6. the thrust component of the rotary compressor according to any one of claim 1-5, it is characterised in that piston radial Minimum seal distance meets following relation：P2-D2-2*e >=4mm, wherein, the annular groove is formed as same with the countershaft bearing bore The annular of axle, the external diameter of the annular groove is D2, and the external diameter of the piston of the rotary compressor is P2, the bent axle it is inclined Heart amount is e.

7. the thrust component of rotary compressor according to claim 1, it is characterised in that the thrust ring is formed as round Annular.

8. the thrust component of rotary compressor according to claim 2, it is characterised in that the thrust ring includes first Annulus section and the second annulus section, the second annulus section are radially inwardly extending from the part internal perisporium of first annulus section, The first annulus section is located in the annular groove, and the second annulus section coordinates on the annular boss.

9. a kind of rotary compressor, it is characterised in that including：

Bent axle, bent axle includes the main shaft section, eccentric segment and the countershaft section that set gradually vertically；

Thrust component, the thrust component is the thrust group of the rotary compressor according to any one of claim 1-8 Part, is combined with the countershaft section to support the crank rotation in the countershaft bearing bore.

10. rotary compressor according to claim 9, it is characterised in that the bent axle also includes being located at the bias Thrust section between section and countershaft section, the thrust section has the thrust surface being only against on the thrust ring, the thrust Exradius of the radius of turn in face less than or equal to the thrust ring.