CN204371682U - Rotary compressor and there is its refrigeration plant - Google Patents

Abstract

The utility model discloses a kind of rotary compressor and there is its refrigeration plant.Wherein, rotary compressor comprises: housing; Axial-flux electric machine, axial-flux electric machine is located in housing; And compressing mechanism, compressing mechanism is located in housing, compressing mechanism comprises main bearing, cylinder, supplementary bearing and bent axle, main bearing, between cylinder and supplementary bearing, limit compression chamber, bent axle is provided with eccentric part and the balance portion of spaced apart setting vertically, eccentric part is positioned at compression chamber, and balance portion is positioned at the below of cylinder.According to rotary compressor of the present utility model, by arranging balance portion on bent axle, and balance portion and eccentric part are intervally arranged along the axial direction of bent axle.Bent axle is in rotary course, the centrifugal force that balance portion produces may be used for the part centrifugal power offsetting eccentric part generation, thus effectively can reduce the volume of rotor balance, make the more compact structure of rotary compressor, volume less, reduce cost of production.

Description

Rotary compressor and there is its refrigeration plant

Technical field

The utility model relates to technical field of refrigeration equipment, specifically, and particularly a kind of rotary compressor and there is its refrigeration plant.

Background technique

In recent years along with the development of electromechanics trade, the high-performance optimization of such as magnetic material, has begun one's study in compressor industry and applied axial-flux electric machine in rotary compressor.

Axial-flux electric machine is also named " disc motor ", i.e. main field and the motor along rotor shaft direction.Motor in axial magnetic field is different from common electric machine, and its flow direction is axially, and current－carrying conductor system radial direction is placed, and stators and rotators iron core is tray type structure.The shortcoming of motor in axial magnetic field is that the magnetic pull between stators and rotators is very large, but adopts " interlayer " structure, namely establishes between two stators between a rotor or two rotors and establishes a stator to overcome.

Axial-flux electric machine is identical with conventional motor, needs to ensure that the gap between stator and rotor is certain value, and in general the gap of this rotor end-face and stator faces is not more than 1mm.Conventional motor coordinates to come control gap by rotor radial outer surface with diameter of stator bore face, therefore can arrange the equilibrium block of hectogram on tens in the upper and lower end face of rotor.But then not all right for axial-flux electric machine, because this motor must be coordinated with stator by rotor upper and lower end face, it is almost impossible for therefore also will arranging corresponding equilibrium block between the upper and lower end face less than 1mm.Even if rotor end-face and stator line bag gap and gap between rotor and housing be greater than gap between rotor end-face and stator faces, but still cannot place the larger rotor balance of volume.

Due to the structural characteristics of axial-flux electric machine, the upper and lower end face of rotor needs directly to carry out very little gap with stator component and coordinates, and rotor top and bottom can not be provided with conventional equilibrium block.Cause the rotor balance of this structure that corresponding equilibrium block can not be set in the upper and lower end face of rotor as convention rotor and reach the unbalance moment balancing the pump housing; And the effect of equilibrium block is very important for rotary compressor.If the crankshaft eccentric portion of the pump housing and the unbalanced force being sleeved on the piston on eccentric part cannot go by the equilibrium block that other positions are arranged to offset, what so first affect is exactly reliability for rotary type compressor pump body provided therewith.Due to moment unbalance, serious eccentric wear phenomenon can be produced by causing the metal (upper of the pump housing and bent axle cooperation place; Simultaneously because the unbalanced force of eccentric part exists, the push stopping part of bent axle will be caused stressed excessive, equally also can produce heavy wear phenomenon.Above-mentioned phenomenon has had a strong impact on the integrity problem of rotary compressor on the one hand, also causes the friction power loss of friction pair in the pump housing to increase significantly on the other hand, thus makes the overall power of rotary compressor increase.For the noise vibration problem of rotary compressor, when the unbalanced force at pump housing place balances without corresponding equilibrium block, have considerable influence too.Therefore how on the rotor of axial-flux electric machine, designing rational balance block structure, is the major issue that this structure rotary compressor needs to consider.

Model utility content

The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the utility model proposes a kind of rotary compressor, described rotary compressor has the advantage of compact structure, stable performance.

The utility model also proposes a kind of refrigeration plant, and described refrigeration plant has rotary compressor as above.

Provide a kind of rotary compressor according to an aspect of the present utility model, comprising: housing, axial-flux electric machine, described axial-flux electric machine is located in described housing, and compressing mechanism, described compressing mechanism is located in described housing, described compressing mechanism comprises main bearing, cylinder, supplementary bearing and bent axle, described main bearing is located at the top of described cylinder, described supplementary bearing is located at the bottom of described cylinder, described main bearing, compression chamber is limited between described cylinder and described supplementary bearing, described bent axle runs through described main bearing, described cylinder and described supplementary bearing, described bent axle is connected with described axial-flux electric machine, described bent axle is provided with eccentric part and the balance portion of spaced apart setting vertically, described eccentric part is positioned at described compression chamber, described balance portion is positioned at the below of described cylinder.

According to rotary compressor of the present utility model, by arranging balance portion on bent axle, and balance portion and eccentric part are intervally arranged along the axial direction of bent axle.Bent axle is in rotary course, the centrifugal force that balance portion produces may be used for the part centrifugal power offsetting eccentric part generation, thus effectively can reduce the volume of rotor balance, conveniently rotor balance is arranged on rotor, and then reduce the vibration of bent axle, improve the working stability of rotary compressor.Also make the more compact structure of rotary compressor, volume less simultaneously, reduce cost of production.

Alternatively, described balance portion is positioned at the below of described supplementary bearing.

In an embodiment of the present utility model, rotary compressor comprises further: dividing plate, and described dividing plate is located between described cylinder and described supplementary bearing, limits the counter balance pocket for holding described balance portion between described dividing plate and described supplementary bearing.

Alternatively, the lower surface of described dividing plate being formed with the first receiving groove to being recessed on, between described first receiving groove and described supplementary bearing, limiting described counter balance pocket.

Further, described dividing plate comprises: body, and described body extends in the horizontal direction; With the balance collar being formed as annular shape, the top of the described balance collar is connected with the lower surface of described body, jointly limits described first receiving groove between the wherein said balance collar and described body.

Alternatively, the upper-end surface of described supplementary bearing is formed with the second recessed receiving groove downwards, between described second receiving groove and described dividing plate, limits described counter balance pocket.

Preferably, described bent axle is provided with push stopping part, and described push stopping part is positioned at the bottom in described balance portion, and the lower surface of described push stopping part is formed as thrust surface, and described thrust surface contacts with described supplementary bearing.

Preferably, described eccentric part, described balance portion and described bent axle are one-body molded.

According to embodiments more of the present utility model, on the cross section of described bent axle, described balance portion is rounded, fan-shaped, oval, cam-shaped or polygonal.

Another aspect provides a kind of refrigeration plant according to of the present utility model, described refrigeration plant comprises: rotary compressor as above; Condenser, described condenser is connected with described rotary compressor; Expansion mechanism, described expansion mechanism is connected with described condenser; Vaporizer, described vaporizer is connected with described expansion mechanism.

According to refrigeration plant of the present utility model, by arranging balance portion on bent axle, and balance portion and eccentric part are intervally arranged along the axial direction of bent axle.Bent axle is in rotary course, the centrifugal force that balance portion produces may be used for the part centrifugal power offsetting eccentric part generation, thus effectively can reduce the volume of rotor balance, conveniently rotor balance is arranged on rotor, and then reduce the vibration of bent axle, improve the working stability of rotary compressor.Also make the more compact structure of rotary compressor, volume less simultaneously, reduce cost of production.

In an embodiment of the present utility model, the inner refrigerant used of described refrigeration plant is any one in HCFC, HFC, HC class.

Accompanying drawing explanation

Fig. 1 is the sectional drawing of the rotary compressor according to the utility model embodiment;

Fig. 2 is the sectional drawing of the rotary compressor according to the utility model embodiment;

Fig. 3 is the sectional drawing of the rotary compressor according to the utility model embodiment;

Fig. 4 is the sectional drawing of the rotary compressor according to the utility model embodiment;

Fig. 5 is the sectional drawing of the rotary compressor according to the utility model embodiment;

Fig. 6 is the plan view of the bent axle of rotary compressor according to the utility model embodiment;

Fig. 7 is the plan view of the bent axle of rotary compressor according to the utility model embodiment;

Fig. 8 is the plan view of the bent axle of rotary compressor according to the utility model embodiment;

Fig. 9 is the plan view of the bent axle of rotary compressor of the prior art.

Reference character:

Rotary compressor 100,

Housing 110,

Axial-flux electric machine 120, stator 121, rotor 122,

Rotor balance 123, the first rotor equilibrium block 1231, second rotor balance 1232,

Third trochanter equilibrium block 1233, fourth trochanter equilibrium block 1234,

Main bearing 131, cylinder 132,

Supplementary bearing 133, the second receiving groove 1331,

Bent axle 134, eccentric part 1341, balance portion 1342, push stopping part 1343, thrust surface 1344,

Main shaft section 1345, eccentric shaft part 1346, middle shaft part 1347, countershaft section 1348,

Piston 135,

Dividing plate 140, counter balance pocket 141, the first receiving groove 142, body 143, the balance collar 144.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.

1-Fig. 9 describes the rotary compressor 100 according to the utility model embodiment in detail with reference to the accompanying drawings.

As shown in Fig. 1-Fig. 9, according to the rotary compressor 100 of the utility model embodiment, comprising: housing 110, axial-flux electric machine 120 and compressing mechanism.

Specifically, as Figure 1-Figure 5, compressing mechanism is located in housing 110, and compressing mechanism can comprise main bearing 131, bent axle 134, cylinder 132 and supplementary bearing 133.Main bearing 131 is located at the top of cylinder 132, and supplementary bearing 133 is located at the bottom of cylinder 132.Main bearing 131, limit compression chamber between supplementary bearing 133 and cylinder 132, bent axle 134 runs through main bearing 131, cylinder 132 and supplementary bearing 133.Bent axle 134 is provided with eccentric part 1341, and eccentric part 1341 is positioned at compression chamber, and the barycenter of eccentric part 1341 departs from the central axis of bent axle 134.Compressing mechanism also comprises piston 135, and piston 135 is set on eccentric part 1341.Axial-flux electric machine 120 is also located in housing 110, and axial-flux electric machine 120 is connected with bent axle 134.

Each radial magnetic field motor has the motor in axial magnetic field of a correspondence in theory, and the magnetic circuit of the latter and air gap value more malleable, in embodiment of the present utility model, select the axial-flux electric machine 120 of employing two stators 121, rotor 122.The stator needed for artificer and the air gap value between rotor can be reached thus by adjust size.Such as, as Figure 1-Figure 5, axial-flux electric machine 120 comprises the stator 121 that a rotor 122 and two are fixed on housing 110 inside.Rotor 122 and two stators 121 are arranged along the central axis of bent axle 134, and rotor 122, between two stators 121, has gap between rotor 122 and the stator 121 be located thereon, and has gap between rotor 122 and the stator under it 121.Rotor 122 is connected to be with dynamic crankshaft 134 to rotate with bent axle 134.

Rotary compressor in working order under, rotor banding dynamic crankshaft rotates.Because bent axle is provided with eccentric part, under the effect of the centrifugal force of eccentric part, bent axle will produce vibration, thus the position that bent axle coordinates with main bearing, supplementary bearing produces serious eccentric wear phenomenon.In correlation technique, for offsetting centrifugal force that eccentric part produces, prevent between bent axle and main bearing, supplementary bearing appearance eccentric wear phenomenon, usually rotor balance is set on rotor.Axial-flux electric machine is identical with conventional motor, needs to ensure that the gap between stator and rotor is certain value, and in general the gap of this rotor end-face and stator faces is not more than 1mm.Conventional motor coordinates to come control gap by rotor radial outer surface with diameter of stator bore face, therefore can arrange the equilibrium block of hectogram on tens at the upper and lower end face of rotor.But then not all right for axial-flux electric machine, because this motor must be coordinated with stator by the upper and lower end face of rotor, therefore corresponding equilibrium block also to be set between the upper and lower end face less than 1mm there is larger design difficulty.Due to the structural characteristics of axial-flux electric machine, the upper and lower end face of rotor needs directly to carry out very little gap with stator component and coordinates, rotor top and bottom can not be provided with conventional rotor balance, cause the rotor balance of this structure as convention rotor, can not arrange corresponding rotor balance to reach the unbalance moment of balance compressing mechanism at the upper and lower end face of rotor.

For this reason, bent axle 134 can arrange balance portion 1342.Balance portion 1342 is intervally arranged with the axial direction of eccentric part 1341 along bent axle 134, and balance portion 1342 is positioned at the below of cylinder 132.The barycenter in balance portion 1342 departs from the central axis of bent axle 134, bent axle 134 is in rotary course, the centrifugal force that balance portion 1342 produces may be used for the part centrifugal power offsetting eccentric part 1341 generation, effectively can reduce the volume of rotor balance 123, thus conveniently rotor balance 123 is arranged on the rotor 122, and then the vibration of bent axle 134 can be reduced, improve the stability of rotary compressor.Also the more compact structure of rotary compressor 100, volume can be made less simultaneously, thus reduce cost of production.

The balance portion 1342 describing rotary compressor 100 referring to Fig. 7-Fig. 9 in detail configures principle.It should be noted that, the selected horizontal plane A-A near bent axle 134 lower end surface is reference level, and the perpendicular distance of the barycenter of reference level A-A and eccentric part 1341 is definite value.The quality of the eccentric part 1341 of bent axle 134 is m3, and the perpendicular distance of the barycenter of eccentric part 1341 and the central axis of bent axle 134 is R3, and the barycenter of eccentric part 1341 and the perpendicular distance of reference level A-A are L3.The quality being set in the piston 135 of eccentric part 1341 is m4, and the perpendicular distance of the barycenter of piston 135 and the central axis of bent axle 134 is R4, and the barycenter of piston 135 and the perpendicular distance of reference level A-A are L4.

Fig. 7 is the structural representation of the bent axle 134 of rotary compressor 100 according to the utility model embodiment, wherein on the upper-end surface of rotor 122 or near the position of the upper-end surface of rotor 122, is provided with the first rotor equilibrium block 1231.In the figure 7, the quality in the balance portion 1342 of bent axle 134 is m0, and the perpendicular distance of the barycenter in balance portion 1342 and the central axis of bent axle 134 is R0, and the barycenter in balance portion 1342 and the perpendicular distance of reference level A-A are L0.The quality of the first rotor equilibrium block 1231 is m2, the R2 of the barycenter of the first rotor equilibrium block 1231 and the perpendicular distance of bent axle 134 central axis, and the barycenter of the first rotor equilibrium block 1231 and the perpendicular distance of reference level A-A are L2.

Fig. 8 is the structural representation of the bent axle 134 of rotary compressor 100 according to the utility model embodiment, wherein on rotor 122 lower end surface or near the position of the lower end surface of rotor 122, is provided with the second rotor balance 1232.In fig. 8, the quality in the balance portion 1342 of bent axle 134 is m1, and the perpendicular distance of the barycenter in balance portion 1342 and the central axis of bent axle 134 is R1, and the barycenter in balance portion 1342 and the perpendicular distance of reference level A-A are L1.The quality of the second rotor balance 1232 is m5, the R5 of the barycenter of the second rotor balance 1232 and the perpendicular distance of bent axle 134 central axis, and the barycenter of the first rotor equilibrium block 1232 and the perpendicular distance of reference level A-A are L5.

Fig. 9 is the arrangement mode of the rotor balance 123 on the structure of the bent axle 134 of rotary compressor 100 of the prior art and rotor 122.In fig .9, be provided with third trochanter equilibrium block 1233 on end face or near the position of rotor 122 upper-end surface on the rotor 122, on rotor 122 lower end surface or near the position of rotor 122 lower end surface, be provided with fourth trochanter equilibrium block 1234.The quality of third trochanter equilibrium block 1233 is m7, and the perpendicular distance of the barycenter of third trochanter equilibrium block 123 and the central axis of bent axle 134 is R7, and the barycenter of third trochanter equilibrium block 123 and the perpendicular distance of reference level A-A are L7.The quality of fourth trochanter equilibrium block 1234 is m6, and the perpendicular distance of the barycenter of fourth trochanter equilibrium block 1234 and the central axis of bent axle 134 is R6, and the barycenter of fourth trochanter equilibrium block 1234 and the perpendicular distance of reference level A-A are L6.

As shown in Figure 9, according to the configuration principle in the balance portion of rotary compressor, then following formula is had:

m6R6＝m7R7+m3R3+m4R4，

m6R6L6＝m7R7L7+m3R3L3+m4R4L4，

Can obtain: m6=[m3R3 (L7-L3)+m4R4 (L7-L4)]/(L7-L6) R6,

m7＝[m3R3(L6-L3)+m4R4(L6-L4)]/(L7-L6)R7，

In like manner, as shown in Figure 7, then following formula is had:

m3R3+m4R4＝m2R2+m0R0，

m3R3L3+m4R4L4＝m2R2L2+m0R0L0，

Can obtain: m0=[m3R3 (L2-L3)+m4R4 (L2-L4)]/(L2-L0) R0,

m2＝[m3R3(L3-L0)+m4R4(L4-L0)]/(L2-L0)R2，

In like manner, as shown in Figure 8, then following formula is had:

m3R3+m4R4＝m5R5+m1R1，

m3R3L3+m4R4L4＝m5R5L5+m1R1L1，

Can obtain: m1=[m3R3 (L5-L3)+m4R4 (L5-L4)]/(L5-L0) R0,

m5＝[m3R3(L3-L1)+m4R4(L4-L1)]/(L5-L1)R2，

According to Fig. 7, Fig. 9:

(L6-L3)>>(L3-L0)，

(L6-L4)>>(L4-L0)，

(L7-L6)<<(L2-L0)，

In addition because the first rotor equilibrium block 1231 in Fig. 7, the third trochanter equilibrium block 1233 in Fig. 9 are all close or are arranged on rotor 122 upper-end surface, therefore can suppose that the first rotor equilibrium block 1231 is identical with the shape of third trochanter equilibrium block 1233, i.e. R2=R7: then known

m2<<m7，

In like manner according to Fig. 8, Fig. 9:

m5<<m6，

Thus, known by arranging the quality that balance portion 1342 significantly can reduce rotor balance 123 on bent axle 134, when shape one timing of rotor balance 123, can the thickness of bright reduction rotor balance 123, in the gap that rotor balance 123 can be arranged between rotor 122 and housing 110.Be convenient to thus arrange rotor balance 123 on the rotor 122, the structure of rotary compressor 100 also can be made compacter simultaneously.

Alternatively, as shown in Figure 7, Figure 8, reference level A-A is lower end surface, bent axle 134 balance portion 1342, L1 and L0 can be made thus to obtain less value, therefore can think:

(L3-L0)≈(L3-L1)，

(L4-L0)≈(L4-L1)，

(L2-L0)>(L5-L1)，

Therefore known:

m2<m5，

Be identical according to above formula known hypothesis rotor 122 balance portion 1342 shape equally, the quality of the first rotor equilibrium block 1231 then in Fig. 7 can be less, and then the thickness of the first rotor equilibrium block 1231 can be made less, thus, the structure that effectively can reduce rotor balance 123 by arranging balance portion 1342 on bent axle 134 can be proved further, thus solve the problem cannot installing rotor balance 123 because space between rotor 122 and housing 110 is less.

According to the rotary compressor 100 of the utility model embodiment, by arranging balance portion 1342 on bent axle 134, and balance portion 1342 is intervally arranged with the axial direction of eccentric part 1341 along bent axle 134.Bent axle 134 is in rotary course, the centrifugal force that balance portion 1342 produces may be used for the part centrifugal power offsetting eccentric part 1341 generation, thus effectively can reduce the volume of rotor balance 123, conveniently rotor balance 123 is arranged on the rotor 122, and then reduce the vibration of bent axle 134, improve the working stability of rotary compressor 100.Also make the more compact structure of rotary compressor 100, volume less simultaneously, reduce cost of production.

As Figure 1-Figure 8, according to embodiments more of the present utility model, eccentric part 1341, balance portion 1342 and bent axle 134 are one-body molded.Such as balance portion 1342, eccentric part 1341 can be integrated to cast with bent axle 134 and be formed, and facilitate the overall processing manufacture of bent axle 134 thus.Certainly, eccentric part 1341 is not limited to this with the Placement of bent axle 134, and such as, in other embodiments of the present utility model, balance portion 1342 can also pass through locating stud (scheming not shown) and removably be located on bent axle 134.That is, balance portion 1342 and bent axle 134 manufacturing separately, balance portion 1342 is fixed on bent axle 134 by locating stud.Thus, maintenance and the replacing in balance portion 1342 is convenient to.

In addition, also it should be noted that, for convenience of processing, on the cross section of bent axle 134, balance portion 1342 can be rounded.Certainly, on the cross section of bent axle 134, the shape in balance portion 1342 is not limited to this, as long as its centroid position depart from bent axle 134 central axis, with offset eccentric part 1341 produce centrifugal force, such as, in other examples of the present utility model, on the cross section of bent axle 134, balance portion 1342 can also in fan-shaped, oval, cam-shaped or polygonal.

Describe in detail according to the rotary compressor 100 of the utility model embodiment referring to three specific embodiments.Be worth understanding, following embodiment is exemplary illustration, instead of to concrete restriction of the present utility model.

Embodiment 1

As shown in Figure 1, in this embodiment, balance portion 1342 is positioned at the below of supplementary bearing 133.By balance portion 1342 being arranged on the below of supplementary bearing 133, balance portion 1342 can being avoided to interfere with the miscellaneous part in housing 110 in rotary course, thus improve the working stability of rotary compressor 100.Meanwhile, also can simplify the structure of rotary compressor 100 further, reduce the cost of production of rotary compressor 100.

Embodiment 2

As shown in Fig. 2, Fig. 3, Fig. 5 and Fig. 6, in this embodiment, bent axle 134 can comprise the main shaft section 1345, eccentric shaft part 1346, middle shaft part 1347 and the countershaft section 1348 that connect successively from top to bottom.Wherein, main bearing 131 coordinates with main shaft section 1345, and supplementary bearing 133 coordinates with countershaft section 1348, and eccentric part 1341 is arranged on eccentric shaft part 1346, and balance portion 1342 is arranged on middle shaft part 1347.

Rotary compressor 100 can also comprise: dividing plate 140.Dividing plate 140 is located between cylinder 132 and supplementary bearing 133, limits the counter balance pocket 141 for holding balance portion 1342 between dividing plate 140 and supplementary bearing 133.That is, dividing plate 140 is set on bent axle 134, and dividing plate 140 is positioned on middle shaft part 1347, and dividing plate 140 limits counter balance pocket 141 jointly with the upper-end surface of supplementary bearing 133, and balance portion 1342 can rotate in counter balance pocket 141.Thus, the vibration of bent axle 134 can be reduced, and then can effectively avoid producing eccentric wear phenomenon between bent axle 134 and main bearing 131, supplementary bearing 133.Meanwhile, balance portion 1342 also can be effectively avoided to interfere with the miscellaneous part in housing 110.

As shown in Figures 2 and 3, for convenience of processing, the lower surface of dividing plate 140 is formed and limits counter balance pocket 141 between the first receiving groove 142, first receiving groove 142 be recessed on and supplementary bearing 133.Certainly, the limiting mode of counter balance pocket 141 is not limited to this, such as, as shown in Figure 5, the upper-end surface of supplementary bearing 133 is formed between the second recessed downwards receiving groove 1331, second receiving groove 1331 and dividing plate 140 and limits counter balance pocket 141.

It should be noted that, balance portion 1342 in rotary course may with the contact internal walls of counter balance pocket 141, and produce friction, in order to reduce the area of contact between the outer surface in balance portion 1342 and counter balance pocket 141 inwall, bent axle 134 can be provided with push stopping part 1343.As shown in Figure 6, push stopping part 1343 is positioned at the bottom in balance portion 1342, and the lower surface of push stopping part 1343 is formed as thrust surface 1344, and thrust surface 1344 contacts with supplementary bearing 133.Thus, when being assembled on supplementary bearing 133 by bent axle 134, thrust surface 1344 offsets with the upper-end surface of supplementary bearing 133, is formed with gap between the lower end surface in balance portion 1342 and the upper-end surface of supplementary bearing 133.Thus, the area of contact between the lower end surface in balance portion 1342 and supplementary bearing 133 upper-end surface can be reduced, and then reduce the area of contact of the outer surface in balance portion 1342 and the inwall of counter balance pocket 141, reduce the wearing and tearing of the inwall of balance portion 1342 or counter balance pocket 141, thus extend the working life of bent axle 134 or supplementary bearing 133.

What be worth understanding is, by changing size, the shape in balance portion 1342, the position of rotor balance 123 can be changed, such as, in example as shown in Figure 2, rotor balance 123 is located between rotor 122 and housing 110, and rotor balance 123 is arranged on the position of the lower end surface near rotor 122; For another example, in example as shown in Figure 3, rotor balance 123 is located between rotor 122 and housing 110, and rotor balance 123 is arranged on the position of the lower end surface near rotor 122.Be understandable that, according to difform balance portion 1342, the axial-flux electric machine 120 suitable with it can be selected; Certainly, also according to the axial-flux electric machine 120 of different model, the balance portion 1342 suitable with it can be selected.Thus, improve the Applicable scope of the bent axle 134 with balance portion 1342, and then decrease quantity in stock, saved cost of production.

Embodiment 3

As shown in Figure 4, as different from Example 2, in this embodiment, dividing plate 140 comprises: body 143 and the balance collar 144.Wherein, body 143 extends in the horizontal direction, and the balance collar 144 is formed as annular shape, and the top of the balance collar 144 is connected with the lower surface of body 143, wherein balances between the collar 144 and body 143 and jointly limits the first receiving groove 142.

It should be noted that, balance portion 1342 in rotary course may with the contact internal walls of counter balance pocket 141, and produce friction, in order to the inner wall abrasion of the outer surface and counter balance pocket 141 that slow down balance portion 1342, need to carry out fine finishing to the inwall of counter balance pocket 141.By dividing plate 140 being arranged to the structure of body 143 and the balance collar 144, effectively can reducing difficulty of processing, and then shortening the manufacture cycle, reducing cost of production.

According to the utility model, embodiment on the other hand provides a kind of chiller plant, and described refrigeration plant comprises: rotary compressor 100, condenser, expansion mechanism and vaporizer as above.Specifically, condenser is connected with rotary compressor 100, and expansion mechanism is connected with condenser, and vaporizer is connected with expansion mechanism.

According to the chiller plant of the utility model embodiment, by arranging balance portion 1342 on bent axle 134, and balance portion 1342 is intervally arranged with the axial direction of eccentric part 1341 along bent axle 134.Bent axle 134 is in rotary course, the centrifugal force that balance portion 1342 produces may be used for the part centrifugal power offsetting eccentric part 1341 generation, thus effectively can reduce the volume of rotor balance 123, conveniently rotor balance 123 is arranged on the rotor 122, and then reduce the vibration of bent axle 134, improve the working stability of rotary compressor 100.Also make the more compact structure of rotary compressor 100, volume less simultaneously, reduce cost of production.

In an embodiment of the present utility model, the inner refrigerant used of refrigeration plant can be any one in HCFC, HFC, HC class.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.

In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.

Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.

Claims (11)

1. a rotary compressor, is characterized in that, comprising:

Housing;

Axial-flux electric machine, described axial-flux electric machine is located in described housing; And

Compressing mechanism, described compressing mechanism is located in described housing, described compressing mechanism comprises main bearing, cylinder, supplementary bearing and bent axle, described main bearing is located at the top of described cylinder, described supplementary bearing is located at the bottom of described cylinder, described main bearing, compression chamber is limited between described cylinder and described supplementary bearing, described bent axle runs through described main bearing, described cylinder and described supplementary bearing, described bent axle is connected with described axial-flux electric machine, described bent axle is provided with eccentric part and the balance portion of spaced apart setting vertically, described eccentric part is positioned at described compression chamber, described balance portion is positioned at the below of described cylinder.

2. rotary compressor according to claim 1, is characterized in that, described balance portion is positioned at the below of described supplementary bearing.

3. rotary compressor according to claim 1, is characterized in that, comprises further:

Dividing plate, described dividing plate is located between described cylinder and described supplementary bearing, limits the counter balance pocket for holding described balance portion between described dividing plate and described supplementary bearing.

4. rotary compressor according to claim 3, is characterized in that, the lower surface of described dividing plate is formed with the first receiving groove to being recessed on, and limits described counter balance pocket between described first receiving groove and described supplementary bearing.

5. rotary compressor according to claim 4, is characterized in that, described dividing plate comprises:

Body, described body extends in the horizontal direction; With

Be formed as the balance collar of annular shape, the top of the described balance collar is connected with the lower surface of described body, jointly limits described first receiving groove between the wherein said balance collar and described body.

6. rotary compressor according to claim 3, is characterized in that, the upper-end surface of described supplementary bearing is formed with the second recessed receiving groove downwards, limits described counter balance pocket between described second receiving groove and described dividing plate.

7. rotary compressor according to claim 3, is characterized in that, described bent axle is provided with push stopping part, and described push stopping part is positioned at the bottom in described balance portion, and the lower surface of described push stopping part is formed as thrust surface, and described thrust surface contacts with described supplementary bearing.

8. rotary compressor according to claim 1, is characterized in that, described eccentric part, described balance portion and described bent axle are one-body molded.

9. the rotary compressor according to any one of claim 1-8, is characterized in that, on the cross section of described bent axle, described balance portion is rounded, fan-shaped, oval, cam-shaped or polygonal.

10. a refrigeration plant, is characterized in that, described refrigeration plant comprises:

Rotary compressor according to any one of claim 1-9;

Condenser, described condenser is connected with described rotary compressor;

Expansion mechanism, described expansion mechanism is connected with described condenser;

Vaporizer, described vaporizer is connected with described expansion mechanism.

11. refrigeration plants according to claim 10, is characterized in that, the inner refrigerant used of described refrigeration plant is any one in HCFC, HFC, HC class.