CN204140422U - Rotary compressor - Google Patents

Abstract

The utility model discloses a kind of rotary compressor, comprising: housing, motor, compressing mechanism, auxiliary bearing and fan component, motor is located in housing; Compressing mechanism is located at the side in housing, and compressing mechanism comprises bent axle; Auxiliary bearing is located at the side away from compressing mechanism in housing and for the upper end portion of supporting crankshaft; Fan component is located at the upper end portion of bent axle and is positioned at the top of auxiliary bearing, fan component is formed provide lubricant oil to pass through leakage of oil passage to lubricate auxiliary bearing.According to rotary compressor of the present utility model, by arranging leakage of oil passage on fan component, leakage of oil passage ensures the fashionable prelubrication to auxiliary bearing of lubrication oil seal, thus reduces the starting torque of rotary compressor and the heating value of auxiliary bearing.In addition, be conducive to shortening the angle of incidence of rotary compressor lubrication oil seal, improve manufacturing efficiency.

Description

Rotary compressor

Technical field

The utility model relates to art of refrigeration units, especially relates to a kind of rotary compressor.

Background technique

At present, along with the expansion of compressor with rolling rotor application, the trend of the future developments such as the oriented huge discharge of rolling rotor type compressor, high frequency.When the discharge capacity of rolling rotor type compressor is larger, be very easy to cause bent axle degree of disturbing large according to traditional compression mechanical part pump housing means of fixation (such as bearing is fixed, cylinder is fixed or frame is fixed), cause a series of integrity problem such as bent axle and bearing bore diameter sintering.

In order to compared with the reliability improving huge discharge rolling rotor type compressor under small axle diameter, usual employing auxiliary bearing structure, namely, except compressor section arranges support, also another support can be set at motor stator core upper space and bent axle major axis end is supported.

But due to the increase of compressor displacement and the existence of auxiliary bearing, make the distribution channel of cold media air narrow, refrigeration agent can make gas flow rate rise when flowing through the gap of auxiliary bearing, cause compressor to tell oil mass larger.Except the length making outlet pipe go deep into upper shell inside increases, installing rotor fan on rotor top is also reduce rolling rotor type compressor to tell an excessive conventional measure of oil mass.But for huge discharge dual-gripper compressor, because the more high reason of large, the inner flow velocity of discharge capacity causes oil when using single rotor fan to be separated DeGrain, therefore have employing double fan to improve oily separating effect and to reduce the measure of telling oil mass, namely rotor fan is installed respectively to reduce the structure that oil mass told by compressor at auxiliary bearing upper and lower.But when on the upside of auxiliary bearing, rotor fan is installed in crankshaft end position, there are the following problems: because outlet pipe is longer, its lower end is closer apart from rotor fan upper surface, cause refrigerator oil to enclose difficulty and the inclosure time longer; In addition, external diameter due to rotor fan is greater than the internal diameter of auxiliary bearing, therefore rotor fan can play the effect of " umbrella " to auxiliary bearing, cause auxiliary bearing internal diameter can not obtain effectively infiltrating in advance when refrigerator oil enclosed by compressor, then during compressor start, because lack of lubrication easily causes the problems such as the excessive and bearing heating amount of starting torque is large, in addition, when auxiliary bearing internal diameter is provided with axle bush, axle bush wearing layer is easily caused to occur wearing and tearing.

Model utility content

The utility model is intended at least to solve one of technical problem existed in prior art.For this reason, an object of the present utility model is to propose a kind of rotary compressor, and described rotary compressor can improve the initial lubricating condition of auxiliary bearing, reduces starting torque, improves the reliability of auxiliary bearing.

According to rotary compressor of the present utility model, comprising: housing; Motor, described motor is located in described housing; Compressing mechanism, described compressing mechanism is located at the side in described housing, and described compressing mechanism comprises bent axle; Auxiliary bearing, described auxiliary bearing is located at the side away from described compressing mechanism in described housing and the described upper end portion for supporting described bent axle; And fan component, described fan component is located at the described upper end portion of described bent axle and is positioned at the top of described auxiliary bearing, described fan component is formed provide lubricant oil to pass through leakage of oil passage to lubricate described auxiliary bearing.

According to rotary compressor of the present utility model, by arranging leakage of oil passage on fan component, leakage of oil passage ensures the fashionable prelubrication to auxiliary bearing of lubrication oil seal, thus reduces the starting torque of rotary compressor and the heating value of auxiliary bearing.In addition, be conducive to shortening the angle of incidence of rotary compressor lubrication oil seal, improve manufacturing efficiency.

Further, described fan component comprises fan, and described fan is formed with through mounting hole, and described fan is fixed to the described upper end portion of described bent axle by described mounting hole.

Alternatively, described fan is formed with recessed reentrant part downwards, the female portion comprises diapire and perisporium, and described diapire is connected to the bottom of described perisporium, and wherein said mounting hole is formed on described diapire.

Further, described fan component also comprises: threaded fastener, described threaded fastener comprises the head and screw rod that are connected with each other vertically, the free end of described screw rod is connected to the described upper end portion of described bent axle through described mounting hole, the inner circle wall of described threaded fastener and described mounting hole is spaced apart from each other to limit communicating passage; With two leakage of oil packing rings, described two leakage of oil packing rings are located between the top of the described upper end portion of the upper surface of described head and described fan, the lower surface of described fan and described bent axle respectively, each described leakage of oil packing ring is formed with the oil leaking hole be communicated with described communicating passage, and the described oil leaking hole on described two leakage of oil packing rings and described communicating passage form described leakage of oil passage jointly.

Alternatively, the described oil leaking hole on each described leakage of oil packing ring is two, and described two oil leaking holes along corresponding described leakage of oil packing ring diametrically.

Alternatively, described oil leaking hole is formed by a part for a side surface of the described leakage of oil packing ring of correspondence is recessed to the opposite side surface of described leakage of oil packing ring.

Or alternatively, the inner circle wall of described mounting hole is provided with the isolated multiple lug boss of circumference, and the periphery wall of the described upper end portion of described multiple lug boss and described bent axle is fixed, and limits described leakage of oil passage between two adjacent described lug bosses.

Alternatively, to be multiple and described multiple leakage of oil passage be uniformly distributed along the circumference of described bent axle described leakage of oil passage.

Alternatively, the periphery wall hot jacket of the described upper end portion of described multiple lug boss and described bent axle is fixed.

Or alternatively, described leakage of oil passage is be formed in the leakage of oil through hole on described diapire and/or described perisporium.

Alternatively, described leakage of oil passage is formed on the described diapire in the female portion, and the contiguous described mounting hole of described leakage of oil passage is arranged.

Or alternatively, described leakage of oil passage is formed on the described perisporium in the female portion, and described leakage of oil passage is tilted to extension from top to bottom.

Alternatively, one of them in the periphery wall of the inner circle wall of described mounting hole and the described upper end portion of described bent axle is provided with multiple salient point and another is formed with multiple groove, and described multiple salient point and described multiple groove fit are to be fixed on described fan on described bent axle.

Further, the side towards described fan of described auxiliary bearing is formed with oil storage tank on the surface.

Alternatively, described motor comprises stators and rotators, described rotor is located in described stator, described oil storage tank is formed as annular shape, described fan is rotary structure, and the radius R 1 of described fan meets: R2 < R1 < R3, wherein, described R2 is the outer radius of described oil storage tank, and described R3 is the outer radius of described rotor.

Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.

Accompanying drawing explanation

Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:

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

Fig. 2 is the enlarged view in the A portion that Fig. 1 centre circle shows;

Fig. 3 a is the plan view of the leakage of oil packing ring shown in Fig. 1;

Fig. 3 b is the sectional drawing along B-B line in Fig. 3 a;

Fig. 4 a is the stereogram of the fan according to another embodiment of the utility model;

Fig. 4 b is the plan view of the fan shown in Fig. 4 a;

Fig. 4 c is the sectional drawing along C-C line in Fig. 4 b;

Fig. 5 a is the stereogram of the fan according to another embodiment of the utility model;

Fig. 5 b is the plan view of the fan shown in Fig. 5 a;

Fig. 5 c is the sectional drawing along C-C line in Fig. 5 b;

Fig. 6 is the sectional drawing of the fan according to another embodiment of the utility model.

Reference character:

100: rotary compressor;

11: upper shell; 111: outlet pipe; 12: main casing; 13: lower shell body;

14: epicoele; 15: cavity of resorption;

2: motor; 21: stator; 22: rotor; 221: axial vent;

31: bent axle; 32: main bearing; 33: supplementary bearing;

341: the first cylinders; 342: the second cylinders; 35: central diaphragm; 36: piston;

4: auxiliary bearing; 41: oil storage tank;

51: fan; 511: mounting hole; 512: lug boss; 513: salient point;

514: reentrant part; 5141: diapire; 5142: perisporium;

52: threaded fastener; 521: communicating passage; 53: leakage of oil packing ring; 531: oil leaking hole;

54: leakage of oil passage; 6: support; 7: air guide sleeve.

Embodiment

Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " 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 one or more these features.In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.

In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.

Describe the rotary compressor 100 according to the utility model embodiment below with reference to Fig. 1-Fig. 6, rotary compressor 100 can be High-back-pressure rotary compressor.In description below the utility model, be described for High-back-pressure rotary compressor for rotary compressor 100.Certainly, those skilled in the art are appreciated that rotary compressor 100 can also be low backpressure rotary compressor.

As shown in Figure 1, according to the rotary compressor 100 of the utility model embodiment, comprise housing, motor 2, compressing mechanism, auxiliary bearing 4 and fan component.

With reference to Fig. 1, housing comprises upper shell 11, main casing 12 and lower shell body 13, and upper shell 11 and lower shell body 13 are welded to connect with the two ends up and down of main casing 12 pressurized container forming sealing respectively.The top of upper shell 11 is provided with outlet pipe 111.

Motor 2 is located in housing will be isolated into epicoele 14 and cavity of resorption 15 in housing, wherein cavity of resorption 15 is the side at compressing mechanism place, epicoele 14 is the side away from compressing mechanism, motor 2 comprises stator 21 and rotor 22, stator 21 is fixed on the inwall of main casing 12, rotor 22 is positioned at stator 21, and is connected with the bent axle 31 of compressing mechanism and rotates with driving crank 31.Rotor 22 offers some axial vents 221.

Compressing mechanism is located in the cavity of resorption 15 of housing, compressing mechanism comprises bent axle 31, cylinder part, main bearing 32, supplementary bearing 33, piston 36 and slide plate (scheming not shown), when such as High-back-pressure rotary compressor is duplex cylinder compressor to rotary compressor 100, as shown in Figure 1, cylinder part comprises two cylinders and central diaphragm 35, two cylinders are respectively the first cylinder 341 and the second cylinder 342, first cylinder 341 is positioned at the top of the second cylinder 342, central diaphragm 35 is located between the first cylinder 341 and the second cylinder 342, main bearing 32 is located at above the first cylinder 341, supplementary bearing 33 is located at below the second cylinder 342, main bearing 32, first cylinder 341 and central diaphragm 35 limit a compression chamber, central diaphragm 35, second cylinder 342 and supplementary bearing 33 limit another compression chamber.When High-back-pressure rotary compressor is single cylinder compressor, cylinder part comprises a cylinder, and now main bearing 32 is located at the upper surface of cylinder, and supplementary bearing 33 is located at the lower surface of cylinder, and main bearing 32, cylinder and supplementary bearing 33 limits a compression chamber.

Main bearing 32 coordinates using as the first support unit with the main shaft section of bent axle 31, supplementary bearing 33 coordinates using as the second support unit with the countershaft section of bent axle 31, rotor 22 is connected with bent axle 31 to be with dynamic crankshaft 31 to rotate, the eccentric part of bent axle 31 is positioned at the compression chamber of cylinder part, be enclosed within to do eccentric rotary in the compression chamber of correspondence on eccentric part outside piston 36, the outer surface that the inner of slide plate is only against piston 36 moves reciprocatingly.Here, it should be noted that, " interior " refers to the direction towards compression chamber center, and its opposite direction is defined as " outward ", namely away from the direction at compression chamber center.

With reference to Fig. 1 composition graphs 2, auxiliary bearing 4 is located at the side away from compressing mechanism (namely epicoele 14 is interior) of housing and for the upper end portion of supporting crankshaft 31, namely the upper end portion of bent axle 31 coordinates composition the 3rd support unit with auxiliary bearing 4.Wherein, auxiliary bearing 4 can be fixed on the inwall of housing, and such as, auxiliary bearing 4 can be fixed on the inwall of housing by support 6, has gap between the periphery wall 5142 of the inwall of auxiliary bearing 4 and the upper end portion of bent axle 31.Further, auxiliary bearing 4 is provided with axle bush (scheming not shown) in inside diameter ranges.

As depicted in figs. 1 and 2, fan component is located at the upper end portion of bent axle 31 and is positioned at the top of auxiliary bearing 4, now fan component is between outlet pipe 111 and auxiliary bearing 4, fan component is formed provide lubricant oil to pass through leakage of oil passage 54 to lubricate auxiliary bearing 4, that is, when enclosing lubricant oil such as refrigerator oil in housing, refrigerator oil such as can arrive auxiliary bearing 4 by outlet pipe 111 via leakage of oil passage 54 from the top of housing, thus the pre-lubrication realized auxiliary bearing 4, to reduce starting torque, and improve the reliability of auxiliary bearing 4.Be appreciated that leakage of oil passage 54 can be formed as arbitrary shape, if leakage of oil passage 54 arbitrary position that can be formed on fan component the refrigerator oil of top can be guided into auxiliary bearing 4 and bent axle 31 upper end portion between gap.

In addition, by arranging fan component in the below of outlet pipe 111, can stop that gas mixture is discharged from outlet pipe 111, namely the existence of fan component can avoid the gas mixture below it to be directly discharged in refrigeration system by outlet pipe 111, increase the oil recycle ratio of refrigeration system, what namely fan component can reduce rotary compressor 100 tells oil mass.

Further, as shown in Figure 1, the lower end of auxiliary bearing 4 is fixed with air guide sleeve 7, air guide sleeve 7 is solid of rotation, and air guide sleeve 7 from top to bottom cross-section area reduce gradually, air guide sleeve 7 lower ending opening diameter is approximately equal with the external diameter of rotor 22, and the distance between lower ending opening and rotor 22 upper-end surface should meet security appliance required distance.Air guide sleeve 7 is positioned within motor 2 stator 21 line bag inside diameter ranges.Air guide sleeve 7 for axial vent 221 gas mixture entered in air guide sleeve 7 of the gas mixture entered in air guide sleeve 7 such as rotor 22 is from below directed through auxiliary bearing 4 and bent axle 31 upper end portion between gap to lubricate the upper end portion of auxiliary bearing 4 and bent axle 31.

According to the rotary compressor 100 of the utility model embodiment, by arranging leakage of oil passage 54 on fan component, leakage of oil passage 54 ensures the fashionable prelubrication to auxiliary bearing 4 of lubrication oil seal, thus reduces the starting torque of rotary compressor 100 and the heating value of auxiliary bearing 4.In addition, be conducive to shortening the angle of incidence of rotary compressor 100 lubrication oil seal, improve manufacturing efficiency.

According to an embodiment of the present utility model, as depicted in figs. 1 and 2, fan component comprises fan 51, fan 51 is formed with through mounting hole 511, mounting hole 511 is formed in the central authorities of fan 51, and fan 51 is fixed to the upper end portion of bent axle 31 by mounting hole 511, in other words, fan 51 is fixed relative to bent axle 31, thus fan 51 can rotate along with the rotation of bent axle 31.Wherein, fan 51 is rotary structure, but is not limited thereto.Alternatively, fan 51 is sheet metal part or moulding.

Particularly, with reference to Fig. 1 composition graphs 2, fan 51 is formed with recessed reentrant part 514 downwards, reentrant part 514 is formed in the central authorities of fan 51, reentrant part 514 comprises diapire 5141 and perisporium 5142, diapire 5141 is connected to the bottom of perisporium 5142, wherein mounting hole 511 is formed in the center of diapire 5141, perisporium 5142 is preferably configured to tilt to extend internally from top to bottom, the refrigerator oil flowed into from top like this can flow along the surface of perisporium 5142 to the direction at diapire 5141 center under the Action of Gravity Field of self, certainly, diapire 5141 can also be configured to vertically extend from top to bottom (as shown in Fig. 4 c and Fig. 5 c).Thus, by arranging reentrant part 514 on fan 51, the gas mixture of discharging from compression chamber can roughly along the flow direction flowing shown in the dotted line Fig. 1, flow path is roughly curve, thus reduce the flow velocity of gas mixture, and then reduce further rotary compressor 100 tell oil mass.In addition, the existence of reentrant part 514 can make the lower end of outlet pipe 111 insert into the inner, and changes the flow path of refrigerant, and that reduces rotary compressor 100 tells oil mass.

According to an embodiment of the present utility model, as depicted in figs. 1 and 2, fan component also comprises: threaded fastener 52 and two leakage of oil packing rings 53, threaded fastener 52 can be screw, threaded fastener 52 comprises the head and screw rod that are connected with each other vertically, the free end of screw rod (such as, lower end in Fig. 1 and Fig. 2) there is outside thread, the free end of screw rod (such as, lower end in Fig. 1 and Fig. 2) upper end portion of bent axle 31 is threaded io through mounting hole 511, threaded fastener 52 is spaced apart from each other to limit communicating passage 521 with the inner circle wall 5142 of mounting hole 511.

Two leakage of oil packing rings 53 are located between the top of the upper end portion of the upper surface of head and fan 51, the lower surface of fan 51 and bent axle 31 respectively, namely two leakage of oil packing rings 53 lay respectively at the both sides up and down of diapire 5141, the oil leaking hole 531 each leakage of oil packing ring 53 is formed on oil leaking hole 531, two leakage of oil packing rings 53 of being communicated with communicating passage 521 forms leakage of oil passage 54 jointly with communicating passage 521.Like this, when enclosing refrigerator oil, first refrigerator oil can enter the communicating passage 521 between screw rod and mounting hole 511 by the oil leaking hole 531 of the leakage of oil packing ring 53 above diapire 5141, then discharged by the oil leaking hole 531 of the leakage of oil packing ring 53 below diapire 5141, thus flow to below auxiliary bearing 4 on auxiliary bearing 4 is lubricated.

Alternatively, with reference to Fig. 3 a and Fig. 3 b, oil leaking hole 531 extends along the radial direction of the leakage of oil packing ring 53 of correspondence.Certainly, oil leaking hole 531 can also depart from relative to the radial direction of leakage of oil packing ring 53 (scheming not shown).Further, oil leaking hole 531 can also tilt to extend (scheming not shown) from top to bottom, and such as angled straight lines, broken line or curve extend from top to bottom.It should be noted that, the particular location of oil leaking hole 531 on the leakage of oil packing ring 53 of correspondence and shape can according to actual requirement specific designs, as long as refrigerator oil can be made to be lubricated by leakage of oil passage 54 pairs of auxiliary bearings 4.

See figures.1.and.2 and composition graphs 3a and Fig. 3 b, oil leaking hole 531 on each leakage of oil packing ring 53 is preferably two, and two oil leaking holes 531 along correspondence leakage of oil packing ring 53 diametrically, now two oil leaking holes 531 are symmetrical about the revenue centre of leakage of oil packing ring 53, wherein, each oil leaking hole 531 can be formed by a part for a side surface of the leakage of oil packing ring 53 of correspondence is recessed to the opposite side surface of leakage of oil packing ring 53, easy to process and cost is low, but is not limited thereto.

As depicted in figs. 1 and 2, during assembling, one side surface with oil leaking hole 531 of two leakage of oil packing rings 53 is arranged all down, thus the refrigerator oil flow down all can enter communicating passage 521 by the oil leaking hole 531 of the leakage of oil packing ring 53 of top, and can not accumulate in reentrant part 514, the oil leaking hole 531 of the leakage of oil packing ring 53 of below is comparatively large with oil leaking hole 531 distance in the vertical direction of the leakage of oil packing ring 53 of top, thus ensure that entering refrigerator oil in communicating passage 521 can the oil leaking hole 531 of successfully leakage of oil packing ring 53 from below discharge.

In addition, in the process that the refrigerant of being discharged by compression chamber flows to outlet pipe 111, from refrigerant, isolated refrigerator oil can along the flow path shown in the solid line in Fig. 1, as can be seen from Figure 1, isolated refrigerator oil falls in the reentrant part 514 of the fan 51 of below, and flow to auxiliary bearing 4 by the leakage of oil passage 54 on it, thus can lubricate auxiliary bearing 4 further, avoid, from the center oilhole of bent axle 31, brought various problems are lubricated to auxiliary bearing 4.

Except the fan 51 utilizing screw to fix directly over auxiliary bearing 4 of aforementioned explanation, fan 51 can also be fixed by other approach.For different means of fixation, its leakage of oil passage 54 also has difference.

According to another embodiment of the present utility model, as shown in Fig. 4 a-Fig. 4 c, the inner circle wall 5142 of mounting hole 511 is provided with the isolated multiple lug boss 512 of circumference, multiple lug boss 512 is fixed with the periphery wall 5142 of the upper end portion of bent axle 31, such as multiple lug boss 512 can be realized and being fixedly connected with of the upper end portion of bent axle 31 by the mode of interference fit such as hot jacket, limits leakage of oil passage 54 between two adjacent lug bosses 512.Because each lug boss 512 is to the inner circle wall 5142 of projecting inward mounting hole 511, after fan 51 and bent axle 31 are seated, between the periphery wall 5142 of bent axle 31, the inner circle wall 5142 of mounting hole 511 and adjacent two lug bosses 512, jointly limit above-mentioned leakage of oil passage 54.Thus, the pre-lubrication to auxiliary bearing 4 when refrigerator oil is enclosed can be realized equally by above-mentioned leakage of oil passage 54.

To be multiple and multiple leakage of oil passage 54 be uniformly distributed along the circumference of bent axle 31 leakage of oil passage 54.Wherein, in order to not reduce the effect of fan 51 and not increase amount of unbalance, leakage of oil passage 54 is the smaller the better, and presents and be arranged symmetrically with.As shown in Figure 4 b, the inwall of mounting hole 511 is provided with four lug bosses 512, and the angle between two often adjacent lug bosses 512 is 90 °, and limits a leakage of oil passage 54 between two often adjacent lug bosses 512.

According to another embodiment of the present utility model, with reference to Fig. 5 a-Fig. 5 c and Fig. 6, leakage of oil passage 54 is for being formed in the leakage of oil through hole on diapire 5141 and/or perisporium 5142.That is, leakage of oil passage 54 only can be formed in (as shown in Fig. 5 a-Fig. 5 c) on diapire 5141, also only can be formed on perisporium 5142 (as shown in Figure 6), or be formed on diapire 5141 and perisporium 5142 simultaneously and (scheme not shown).

As shown in Fig. 5 a-Fig. 5 c, leakage of oil passage 54 is formed on the diapire 5141 of reentrant part 514, and leakage of oil passage 54 is formed as through manhole, and the contiguous mounting hole 511 of leakage of oil passage 54 is arranged.Two leakage of oil passages 54 have been shown in the example of 5a-Fig. 5 c, and two leakage of oil passages 54 are symmetrical about the revenue centre of fan 51.Be appreciated that the number of leakage of oil passage 54 can according to actual requirement specific design, the utility model does not do concrete restriction to this.

As shown in Figure 6, leakage of oil passage 54 is formed on the perisporium 5142 of reentrant part 514, and leakage of oil passage 54 is tilted to extension from top to bottom, is beneficial to refrigerator oil and flows out.

Wherein, one of them in the periphery wall 5142 of the inner circle wall 5142 of mounting hole 511 and the upper end portion of bent axle 31 is provided with multiple salient point 513 and another in the periphery wall 5142 of the upper end portion of the inner circle wall 5142 of mounting hole 511 and bent axle 31 is formed with multiple groove, multiple salient points 513 with multiple groove fit so that fan 51 is fixed on bent axle 31.In other words, multiple salient point 513 can all be located on the inner circle wall 5142 of mounting hole 511, also can all be located on the periphery wall 5142 of the upper end portion of bent axle 31, similarly, multiple groove can all be formed on the inner circle wall 5142 of mounting hole 511, also can all be formed on the periphery wall 5142 of the upper end portion of bent axle 31; But, when on the inner circle wall 5142 that multiple salient point 513 is located at mounting hole 511, multiple groove should be formed on the periphery wall 5142 of the upper end portion of bent axle 31, similarly, when on the periphery wall 5142 that multiple salient point 513 is located at the upper end portion of bent axle 31, multiple groove should be formed on the inner circle wall 5142 of mounting hole 511.

Such as in the example of 5a-Fig. 5 c, the inner circle wall 5142 of mounting hole 511 is provided with four salient points 513, four salient points 513 are uniformly distributed along the circumference of the inner circle wall 5142 of mounting hole 511, the outer surface of each salient point 513 can be formed as the sphere protruded towards the center of mounting hole 511, on the periphery wall 5142 of the upper end portion of bent axle 31, the position of corresponding four salient points 513 is formed with four grooves respectively, each groove can be formed as the shape with the shape adaptation of corresponding salient point 513, by coordinating of salient point 513 and groove, can prevent fan 51 from rotating in a circumferential direction and axial float relative to bent axle 31.Thus, easy for installation, and when needing to change one of them in fan 51 and bent axle 31, like a cork another can be pulled down, and fan 51 and bent axle 31 can not be damaged.

Certainly, in the present embodiment, fan 51 can also be fixed on the upper end portion of bent axle 31 by alternate manner.Such as, the threaded fastener 52 above mentioned, now can arrange leakage of oil packing ring 53 in the both sides up and down of fan 51, also can not arrange leakage of oil packing ring 53.

According to further embodiment of the present utility model, as depicted in figs. 1 and 2, a side surface towards fan 51 of auxiliary bearing 4 (such as, upper surface in Fig. 1 and Fig. 2) on be formed with oil storage tank 41, the inner of oil storage tank 41 is opened wide, the refrigerator oil flowed down from leakage of oil passage 54 like this can fall in oil storage tank 41, and flows into the gap between auxiliary bearing 4 and bent axle 31, to lubricate auxiliary bearing 4.Further, the bottom surface of oil storage tank 41 can be formed as the inclined-plane (scheming not shown) being tilted to downward-extension from outside to inside.

With reference to Fig. 1, oil storage tank 41 is formed as annular shape, and the radius R 1 of fan 51 meets: R2 < R1 < R3, wherein, R2 is the outer radius of oil storage tank 41, and R3 is the outer radius of rotor 22.Further, the radius R 1 of fan 51 is slightly less than the outer radius R3 of rotor 22.Thus, avoid refrigerant and in the process upwards flowed, the refrigerator oil in rotary compressor 100 is taken out of, and can successfully be discharged by outlet pipe 111 by the refrigerant upwards flowed in the gap between stator 21 and rotor 22.

The rotary compressor 100 according to the multiple embodiment of the utility model is described in detail below with reference to Fig. 1-Fig. 6.

Embodiment one,

In the present embodiment, as shown in Figure 1, rotary compressor 100 comprises housing, motor 2 and compressing mechanism, and housing comprises the upper shell 11, main casing 12 and the lower shell body 13 that are connected successively from top to bottom, motor 2 and compressing mechanism are all located in housing, and compressing mechanism is positioned at immediately below motor 2.

Specifically, with reference to Fig. 1, motor 2 comprises stator 21 and rotor 22, and stator 21 can be fixed on the upper position of main casing 12 with the form of hot jacket, and rotor 22 is accommodated in stator 21 inside, and rotor 22 can be connected with the bent axle 31 of compressing mechanism with the form of hot jacket.Compressing mechanism also comprises cylinder assembly, the piston 36 of eccentric rotary, the main bearing 32 of sliding support bent axle 31 and supplementary bearing 33.Cylinder assembly comprises two cylinders arranged in the vertical direction, central diaphragm 35 is provided with between two cylinders, each cylinder has compression chamber, namely cylinder assembly comprises the first cylinder 341 and the second cylinder 342, first cylinder 341 is positioned at the top of the second cylinder 342, main bearing 32 is located on the upper surface of the first cylinder 341, and supplementary bearing 33 is located on the lower surface of the second cylinder 342.

Auxiliary bearing 4, in the area of space between the upper-end surface and upper shell 11 internal surface of stator 21 iron core of motor 2, is supported by the upper end portion of its internal diameter to bent axle 31.Fan component is positioned at the top of auxiliary bearing 4, and is fixed by screws in the top of the upper end portion of bent axle 31.Wherein, leakage of oil passage 54 is formed on fan component to make refrigerator oil pass through and to lubricate the auxiliary bearing 4 of below.

Fan component comprises fan 51, threaded fastener 52 such as screw and two leakage of oil packing rings 53.The center of fan 51 is formed with recessed reentrant part 514 downwards, the diapire 5141 of reentrant part 514 is formed with the mounting hole 511 of up/down perforation, the free end of screw (such as, lower end in Fig. 1 and Fig. 2) through mounting hole 511 and with the upper end portion screw-thread fit of bent axle 31, the diameter of mounting hole 511 is greater than the nominal diameter of screw, makes to be spaced apart from each other between the periphery wall 5142 of screw and the inner circle wall 5142 of mounting hole 511 to limit communicating passage 521.The upper surface of the diapire 5141 of fan 51 and lower surface are respectively equipped with a leakage of oil packing ring 53, each leakage of oil packing ring 53 is formed with respectively radial two oil leaking holes 531 (as shown in Figure 3 a and Figure 3 b shows) extended, two oil leaking holes 531 are spaced apart from each other, and each oil leaking hole 531 is all communicated with jointly to form leakage of oil passage 54 with communicating passage 521.In other words, leakage of oil passage 54 is made up of the mounting hole 511 of the oil leaking hole 531 on the leakage of oil packing ring 53 being positioned at fan 51 upper and lower and fan 51.

In addition, the upper-end surface of auxiliary bearing 4 is also formed with recessed oil storage tank 41 downwards, as depicted in figs. 1 and 2.

Like this, due to the existence of leakage of oil packing ring 53, on the one hand, ensure to make partial freeze machine oil arrive the oil storage tank 41 of auxiliary bearing 4 upper surface center position by leakage of oil passage 54 when refrigerator oil is enclosed, thus the pre-lubrication realized auxiliary bearing 4, thus be conducive to the reliability reducing starting torque and raising auxiliary bearing 4.On the other hand, be also conducive to shortening rotary compressor 100 refrigerator oil and enclose the time, enhance productivity.

Embodiment two,

The present embodiment is roughly the same with the structure of embodiment one, and wherein identical parts adopt identical reference character, and difference is: the first, the means of fixation of fan 51 is different; The second, the generation type of leakage of oil passage 54 is different.

As shown in Fig. 4 a-Fig. 4 c, fan component comprises fan 51, the inner circle wall 5142 of the mounting hole 511 of fan 51 is provided with four lug bosses 512 protruded towards the center of mounting hole 511, four lug bosses 512 are uniformly distributed along the inner circle wall 5142 of mounting hole 511, and fan 51 can realize the connection with the upper end portion of bent axle 31 by four lug bosses 512 of this on it.

Wherein, with reference to Fig. 4 b, leakage of oil passage 54 is limited jointly by the inner circle wall 5142 between two lug bosses 512 that this is adjacent of adjacent two lug bosses 512, mounting hole 511 and the periphery wall 5142 of bent axle 31.The pre-lubrication to auxiliary bearing 4 when refrigerator oil is enclosed is realized by the leakage of oil passage 54 on it.

In order to not reduce the effect of fan 51 and not increase amount of unbalance, leakage of oil passage 54 is the smaller the better, and presents and be arranged symmetrically with.

The structure of the housing of the rotary compressor 100 of the present embodiment and the rotary compressor 100 in embodiment one, motor 2, compressing mechanism and auxiliary bearing 4 is roughly the same, therefore no longer describes in detail at this.

Embodiment three,

The present embodiment is roughly the same with the structure of embodiment two, and wherein identical parts adopt identical reference character, and difference is: the first, the means of fixation of fan 51 is different; The second, the generation type of leakage of oil passage 54 is different.

As shown in Fig. 5 a-Fig. 5 c, fan component comprises fan 51, the mounting hole 511 of fan 51 has and somely equally distributedly prevents from rotating in a circumferential direction and the salient point 513 of axial float, and on the periphery wall 5142 of the upper end portion of bent axle 31, offer corresponding groove these salient points 513 are fixed.In other words, the inner circle wall 5142 of the mounting hole 511 of fan 51 is provided with four salient points 513 protruded towards the center of mounting hole 511, four salient points 513 are uniformly distributed along the inner circle wall 5142 of mounting hole 511, the periphery wall 5142 of bent axle 31 forms four grooves corresponding with four salient points 513, by coordinating of four salient points 513 and four grooves, fan 51 can be mounted to securely the upper end portion of bent axle 31.

With reference to Fig. 5 a-Fig. 5 c, in order to ensure downward leakage of oil, the diapire 5141 of the reentrant part 514 at fan 51 center offers some leakage of oil through holes be arranged symmetrically with.

The structure of the housing of the rotary compressor 100 of the present embodiment and the rotary compressor 100 in embodiment two, motor 2, compressing mechanism and auxiliary bearing 4 is roughly the same, therefore no longer describes in detail at this.

Embodiment four,

The present embodiment is roughly the same with the structure of embodiment one, and wherein identical parts adopt identical reference character, and difference is only: the generation type of leakage of oil passage 54 is different.

As shown in Figure 6, the perisporium 5142 of fan 51 is offered the prelubrication to auxiliary bearing 4 when some leakage of oil passages 54 ensure that refrigerator oil is enclosed.That is, leakage of oil passage 54 is for being formed in the leakage of oil through hole on the perisporium 5142 of fan 51, and leakage of oil through hole is tilted to extension from top to bottom.

Wherein, fan 51 can be connected to the upper end portion of bent axle 31 by threaded fastener 52 such as screw.Certainly, fan 51 also can be connected on the upper end portion of bent axle 31 by alternate manners such as hot jackets.

The structure of the housing of the rotary compressor 100 of the present embodiment and the rotary compressor 100 in embodiment one, motor 2, compressing mechanism and auxiliary bearing 4 is roughly the same, therefore no longer describes in detail at this.

According to the rotary compressor 100 of the utility model embodiment, shorten refrigerator oil and enclose the time, improve manufacturing efficiency, and achieve the pre-lubrication to auxiliary bearing 4, thus improve the startability of rotary compressor 100 and improve the reliability of auxiliary bearing 4.

In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " 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, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.

Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.

Claims (15)

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

Housing;

Motor, described motor is located in described housing;

Compressing mechanism, described compressing mechanism is located at the side in described housing, and described compressing mechanism comprises bent axle;

Auxiliary bearing, described auxiliary bearing is located at the side away from described compressing mechanism in described housing and the upper end portion for supporting described bent axle; And

Fan component, described fan component is located at the described upper end portion of described bent axle and is positioned at the top of described auxiliary bearing, described fan component is formed provide lubricant oil to pass through leakage of oil passage to lubricate described auxiliary bearing.

2. rotary compressor according to claim 1, is characterized in that, described fan component comprises fan, and described fan is formed with through mounting hole, and described fan is fixed to the described upper end portion of described bent axle by described mounting hole.

3. rotary compressor according to claim 2, it is characterized in that, described fan is formed with recessed reentrant part downwards, the female portion comprises diapire and perisporium, described diapire is connected to the bottom of described perisporium, and wherein said mounting hole is formed on described diapire.

4. the rotary compressor according to Claims 2 or 3, is characterized in that, described fan component also comprises:

Threaded fastener, described threaded fastener comprises the head and screw rod that are connected with each other vertically, the free end of described screw rod is connected to the described upper end portion of described bent axle through described mounting hole, the inner circle wall of described threaded fastener and described mounting hole is spaced apart from each other to limit communicating passage; With

Two leakage of oil packing rings, described two leakage of oil packing rings are located between the top of the described upper end portion of the upper surface of described head and described fan, the lower surface of described fan and described bent axle respectively, each described leakage of oil packing ring is formed with the oil leaking hole be communicated with described communicating passage, and the described oil leaking hole on described two leakage of oil packing rings and described communicating passage form described leakage of oil passage jointly.

5. rotary compressor according to claim 4, is characterized in that, the described oil leaking hole on each described leakage of oil packing ring is two, and described two oil leaking holes along corresponding described leakage of oil packing ring diametrically.

6. rotary compressor according to claim 4, is characterized in that, described oil leaking hole is formed by a part for a side surface of the described leakage of oil packing ring of correspondence is recessed to the opposite side surface of described leakage of oil packing ring.

7. the rotary compressor according to Claims 2 or 3, it is characterized in that, the inner circle wall of described mounting hole is provided with the isolated multiple lug boss of circumference, the periphery wall of the described upper end portion of described multiple lug boss and described bent axle is fixed, and limits described leakage of oil passage between two adjacent described lug bosses.

8. rotary compressor according to claim 7, is characterized in that, to be multiple and described multiple leakage of oil passage be uniformly distributed along the circumference of described bent axle described leakage of oil passage.

9. rotary compressor according to claim 7, is characterized in that, the periphery wall hot jacket of the described upper end portion of described multiple lug boss and described bent axle is fixed.

10. rotary compressor according to claim 3, is characterized in that, described leakage of oil passage is be formed in the leakage of oil through hole on described diapire and/or described perisporium.

11. rotary compressors according to claim 10, is characterized in that, described leakage of oil passage is formed on the described diapire in the female portion, and the contiguous described mounting hole of described leakage of oil passage is arranged.

12. rotary compressors according to claim 10, is characterized in that, described leakage of oil passage is formed on the described perisporium in the female portion, and described leakage of oil passage is tilted to extension from top to bottom.

13. rotary compressors according to any one of claim 10-12, it is characterized in that, one of them in the periphery wall of the inner circle wall of described mounting hole and the described upper end portion of described bent axle is provided with multiple salient point and another is formed with multiple groove, and described multiple salient point and described multiple groove fit are to be fixed on described fan on described bent axle.

14. rotary compressors according to claim 2, is characterized in that, the side towards described fan of described auxiliary bearing is formed with oil storage tank on the surface.

15. rotary compressors according to claim 14, is characterized in that, described motor comprises stators and rotators, and described rotor is located in described stator, and described oil storage tank is formed as annular shape,

Described fan is rotary structure, and the radius R 1 of described fan meets:

R2＜R1＜R3

Wherein, described R2 is the outer radius of described oil storage tank, and described R3 is the outer radius of described rotor.