CN205315275U - Hermetically sealed compressor - Google Patents

Abstract

The utility model relates to a hermetically sealed compressor, its problem lies in, if keep the cylinder body the height unchangeably make the discharge volume realize the large capacityization and enlarge the offset of the eccentric axial region of bent axle with the internal diameter, the eccentricity direction's of the ungetatable eccentric axial region of refrigerant oil terminal surface then for the failure of oil feed, thus lubricity and leakproofness reduce. The utility model relates to a hermetically sealed compressor possesses: the bent axle, it has eccentric axial region and is used for drawing refrigerant oil's fuel feeding way, the cylinder body, it has and carries out the cylinder body room of taking in to eccentric axial region, the bearing, it seals the cylinder body room to support the bent axle, and rotary piston, it is installed in eccentric axial region, possesses at eccentric axial region: eccentricity direction's fuel feeding hole, its with fuel feeding way of bent axle intercommunication, and have the opening at the eccentricity direction's of eccentric axial region outer peripheral face, and axial fuel feeding hole, its with fuel feeding hole of eccentricity direction intercommunication, and have the opening at the axial outer peripheral face of eccentric axial region.

Description

Hermetic type compressor

Technical field

This utility model relates to the hermetic type compressor of refrigerating air conditioning device.

Background technology

Existing hermetic type compressor is accommodated in hermetic container, and is configured to include: compression mechanical part, and cold-producing medium is compressed by it; And mechanism portion, compression mechanical part is driven by it. Compression mechanical part is connected by bent axle with mechanism portion, and mechanism portion drives compression mechanical part. Compression mechanical part is provided with discharge chambe, sucks cold-producing medium from suction inlet, this cold-producing medium is compressed and it is discharged from outlet.

Bent axle is made up of main shaft part, eccentric axial portion and countershaft portion, and the eccentric axial portion at bent axle is fitted together to rotary-piston (rollingpiston). Compression mechanical part is made up of cylinder body, rotary-piston and bearing. Cylinder body is provided with the cylinder body room as inner space, is accommodated with eccentric axial portion and the rotary-piston of bent axle in this cylinder body room. Operating room is formed by the inner peripheral surface of the outer peripheral face of the external diameter of rotary-piston Yu the internal diameter of the cylinder body room of cylinder body. Utilizing mechanism portion to make bent axle rotate, and make eccentric axial portion be also carried out eccentric rotary, the rotary-piston chimeric with eccentric axial portion carries out eccentric rotary in the cylinder body room of cylinder body. By the eccentric rotary of rotary-piston so that the volume of the operating room that cylinder body and rotary-piston are formed changes, thus the cold-producing medium being drawn into operating room is compressed.

Additionally, bearing is installed on cylinder body, and bent axle is supported.

Owing to being constituted above, so there is multiple sliding position at compression mechanical part, so that lubricating oil. It addition, in order to suppress the cold-producing medium from discharge chambe to leak, it is necessary to the gap of each parts is sealed.

The lubrication of the sliding position being compressed mechanism part and the refrigerator oil of the sealing of discharge chambe is stockpiled in the bottom of hermetic container. The bottom of bent axle is immersed in the refrigerator oil in this store oil portion, the centrifugal pump effect caused by the rotation by bent axle, refrigerator oil is drawn into the oil passage of the inside being formed at bent axle, and via oil passage by the sliding position of this refrigerator oil supply to compression mechanical part. Such as, bearing oil supplying hole and the rotary-piston oil supplying hole of the fuel feeding road direction bearing from bent axle and rotary-piston supply refrigerator oil it is provided with at bent axle. Thus, refrigerator oil is supplied to the sealing position of the sliding position of rotary-piston, bent axle, bearing etc. and each parts. Additionally, the upper and lower end face of the spatial portion divided by rotary-piston, bearing and bent axle or the eccentric axial portion of bent axle and thrust (thrust) face are provided with the oil supplying hole (for example, referring to patent documentation 1,2) for supplying refrigerator oil.

Patent documentation 1: Japanese Laid-Open Patent Publication 61-055391 publication (page 3, Fig. 1)

Patent documentation 2: Japanese Patent Publication 02-076190 publication (page 4, Fig. 1 and Fig. 2)

In order to make miniaturization and the air conditioner of high output, it is jumbo structure that hermetic type compressor is also required to realize profile small-sized and cold-producing medium minimum cylinder volume and discharge volume. On the other hand, in order to make hermetic type compressor realize small-size high-capacity, it is necessary to the height maintaining cylinder body expands discharge volume unchangeably with internal diameter, it is therefore desirable to expand the offset of the eccentric axial portion of bent axle. Internal diameter in order to maintain cylinder body expands offset unchangeably, it is necessary to increases the diameter of eccentric shaft and reduces the external diameter of rotary-piston.

On the other hand, if increasing the diameter of eccentric shaft and reducing the external diameter of rotary-piston, then the radial thickness of rotary-piston is thinning, and the amount of the refrigerator oil kept between the axial end and the parts of compression mechanical part of rotary-piston reduces and retentivity is died down, and lubricity and sealing reduce. It addition, when expanding offset, in existing oil supplying hole, the peristome of oil supplying hole becomes remote to the distance of the end face on the eccentric direction of eccentric axial portion, and refrigerator oil is difficult to arrive, so that failure of oil feed, lubricity and sealing reduce.

Additionally, there is following problem: in order to prevent the situation of failure of oil feed, even if increasing oil supplying hole radially, also because of the cold-producing medium that compressed, the counteracting force that works from side, operating room towards the central side of bent axle and hinder refrigerator oil in the flowing of oil supplying hole radially, thus being difficult to discharge refrigerator oil from oil supplying hole.

Therefore, when expanding the offset of hermetic type compressor, the lubricity of compression mechanical part reduces, slippage loss increases, and the sealing of rotary-piston reduces, cold-producing medium in discharge chambe leaks from high side to low side, and compressor volume efficiency reduces, and sometimes the energy saving that the cold-heating system using this compressor is overall is caused damage.

Utility model content

This utility model be the problem points in order to solve as above and complete, a kind of hermetic type compressor is provided, the height of maintenance cylinder body expands the offset of the eccentric axial portion of bent axle unchangeably with internal diameter, achieve the expansion of discharge volume, and, even if being provided with the offset of the eccentric axial portion expanding bent axle, without the oil passage that the supply of the outer peripheral face of the outer peripheral face from the radial direction to eccentric axial portion and rotary-piston that make the refrigerator oil is interrupted, ensure that the lubricity of the sliding position of compression mechanical part, inhibit abrasion, and the sealing of compression mechanical part can be maintained, the leakage loss making discharge chambe is less.

Hermetic type compressor involved by this utility model has stockpiled refrigerator oil in hermetic container, and is accommodated with compression mechanical part, and compression mechanism portion possesses: bent axle, and it has eccentric axial portion and for drawing the oil passage of above-mentioned refrigerator oil; Cylinder body, above-mentioned eccentric axial portion is received and has cylinder body room by it; Bearing, above-mentioned cylinder body room is closed by it, and above-mentioned bent axle is supported; And the piston of cylindrical shape, it is installed on above-mentioned eccentric axial portion, and above-mentioned eccentric axial portion has: the first oil supplying hole, and it connects with the oil passage of above-mentioned bent axle and has peristome at the outer peripheral face of the eccentric direction of above-mentioned eccentric axial portion; And second oil supplying hole, it connects with above-mentioned first oil supplying hole and has peristome at the axial outer peripheral face of above-mentioned eccentric axial portion.

Preferably, possessing the first gap between the axial outer peripheral face of the described compression mechanical part outer peripheral face in the cylinder body side of described bearing and described eccentric axial portion, described second oil supplying hole is in described first clearance opening.

Preferably, described compression mechanical part possesses described second gap between the outer peripheral face of the inner peripheral surface of described piston and the radial direction of described eccentric axial portion, and described first oil supplying hole is in described second clearance opening.

Preferably, described eccentric axial portion possesses the 3rd oil supplying hole, 3rd oil supplying hole has peristome at the outer peripheral face with the eccentric direction opposite direction of described eccentric axial portion, and described first oil supplying hole is arranged between the axial outer peripheral face of described eccentric axial portion and described 3rd oil supplying hole.

Preferably, it is being radially arranged multiple described first oil supplying hole.

Preferably, the plurality of first oil supplying hole is interconnected at described second oil supplying hole.

Preferably, the sectional area on direction that the radial direction with described eccentric axial portion of the 3rd oil supplying hole described in the sectional area ratio on direction that the radial direction with described eccentric axial portion of described first oil supplying hole is at a right angle is at a right angle is little.

Preferably, the sectional area on direction that the radial direction with described eccentric axial portion of described first oil supplying hole is at a right angle is below the sectional area on the direction axially at a right angle with described eccentric axial portion of described second oil supplying hole.

Hermetic type compressor involved by this utility model possesses in the eccentric axial portion of bent axle: the oil supplying hole of eccentric direction, and it connects with the oil passage of bent axle and has peristome at the outer peripheral face of the eccentric direction of eccentric axial portion, and axial oil supplying hole, it connects with the oil supplying hole of eccentric direction, and at the axial outer peripheral face of eccentric axial portion, there is peristome, therefore, it is obtained in that following hermetic type compressor: even if the height maintaining cylinder body expands the offset of the eccentric axial portion of bent axle unchangeably with internal diameter, refrigerator oil is to the outer peripheral face of the radial direction of eccentric axial portion, and the supply of the outer peripheral face of rotary-piston is without interruption, it is able to ensure that the lubricity of the sliding position of compression mechanical part suppresses abrasion, and it is able to maintain that the sealing of compression mechanical part makes the leakage loss of discharge chambe reduce.

Accompanying drawing explanation

Fig. 1 is the overall explanation figure of the hermetic type compressor of embodiment 1 of the present utility model.

Fig. 2 is the enlarged drawing of the compression mechanical part of the hermetic type compressor of embodiment 1 of the present utility model.

Fig. 3 is the explanation figure of the compression mechanical part of the hermetic type compressor from end on observation embodiment 1 of the present utility model.

Fig. 4 is the enlarged drawing of the profile of the bent axle in embodiment 1 of the present utility model.

Fig. 5 is the outline drawing observing the bent axle embodiment 1 of the present utility model from side, countershaft portion.

Fig. 6 is the figure that the direction to the bent axle in embodiment 1 of the present utility model illustrates.

Fig. 7 is the explanation figure of the refrigerant loop of the hermetic type compressor using embodiment 1 of the present utility model.

Fig. 8 is the action specification figure of the compression mechanical part of the hermetic type compressor of embodiment 1 of the present utility model.

Fig. 9 is the figure that the main shaft part of bent axle in embodiment 1 of the present utility model, countershaft portion, eccentric axial portion are illustrated.

Figure 10 (a), Figure 10 (b) are the explanation figure during offset amplification of the eccentric axial portion by the bent axle in embodiment 1 of the present utility model.

Figure 11 is the explanation figure observing situation when being provided for oilhole on the eccentric direction of the bent axle embodiment 1 of the present utility model from countershaft side.

Figure 12 is the explanation figure from situation about radially observing when being provided for oilhole on the eccentric direction of the bent axle embodiment 1 of the present utility model.

Figure 13 is the explanation figure of the oil supplying hole on the eccentric direction of the bent axle in embodiment 1 of the present utility model.

Figure 14 is the outline drawing observing the bent axle embodiment 1 of the present utility model from side, countershaft portion.

Figure 15 is the sectional view of the bent axle in embodiment 1 of the present utility model.

Figure 16 is the figure that the flowing of the oil supplying hole to refrigerator oil bent axle in embodiment 1 of the present utility model illustrates.

Description of reference numerals:

1 ... hermetic container; 2 ... mechanism portion; 3 ... compression mechanical part; 4 ... bent axle; 11 ... discharge pipe; 12 ... suck connecting piece; 21 ... stator; 22 ... rotor; 23 ... terminal; 31 ... cylinder body; 32 ... rotary-piston; 33 ... upper bearing (metal); 34 ... lower bearing; 35 ... blade; 36 ... cylinder body room; 37 ... blade groove; 38 ... back pressure chamber; 41 ... main shaft part; 42 ... countershaft portion; 43 ... eccentric axial portion; 44 ... protuberance; 45 ... oil passage; 46 ... peristome; 47,48 ... oil supplying hole; 49 ... otch; 50 ... oil supplying hole; 51 ... peristome; 52 ... oil passage; 53,54,55 ... oil supplying hole; 56,57,58,59 ... peristome; 60,61,62,63,64 ... oil passage; 65,66 ... the first gap; 67,68 ... the second gap; 69,70 ... the gap between piston and bearing; 100 ... hermetic type compressor; 101 ... absorbing silencer; 102 ... condenser; 103 ... expansion valve; 104 ... vaporizer.

Detailed description of the invention

Embodiment 1.

Fig. 1 illustrates closed rotary compressor for implementing embodiment 1 of the present utility model and the explanation figure observed from the radial direction of longitudinal direction and bent axle. Figure, Fig. 3 that compression mechanical part in Fig. 1 amplifies are utilized the X-X ' in Fig. 1 namely to carry out cutting with the plane axially at a right angle of bent axle and from the figure of end on observation by Fig. 2, i.e. the explanation figure of compression mechanical part viewed from above.

As it is shown in figure 1, hermetic type compressor 100 is accommodated with compression mechanical part 3 and mechanism portion 2 in the inside of hermetic container 1, this mechanism portion 2 is in the top of compression mechanical part 3. Mechanism portion 2 and compression mechanical part 3 are linked by bent axle 4. Mechanism portion 2 is configured to include stator 21 and the rotor 22 rotated by magnetic force produced by stator 21, and the revolving force of mechanism portion 2 is transmitted by bent axle 4 to compression mechanical part 3. Stator 21 possesses the coil of coiled electrical conductor, by this coil electricity is produced magnetic force. The coil of stator 21 is connected with the terminal 23 being arranged at hermetic type compressor 100, is energized from the outside of hermetic type compressor 100 via terminal 23. Rotor 22 possesses permanent magnet and the secondary conductor etc. being made up of aluminium bar etc., and responds magnetic force produced by the coil of stator 21 and rotate.

Compression mechanical part 3 utilizes the refrigerant gas of the revolving force of the mechanism portion 2 the being passed low pressure to being drawn into compression mechanical part 3 to be compressed, and is discharged in hermetic container 1 by the refrigerant gas of high pressure. It is full of by the refrigerant gas of the High Temperature High Pressure after compressing in hermetic container 1. On the other hand, in the lower section of hermetic container 1, namely bottom stockpiles the refrigerator oil of the lubrication for compression mechanical part 3.

Bent axle 4 is configured to include main shaft part 41, countershaft portion 42 and eccentric axial portion 43, and arranges according to the order in main shaft part 41, eccentric axial portion 43, countershaft portion 42 vertically. That is, the axial side of eccentric axial portion 43 being provided with main shaft part 41, the axial opposite side in eccentric axial portion 43 is provided with countershaft portion 42. Main shaft part 41, countershaft portion 42 and eccentric axial portion 43 generally cylindrical shape respectively, main shaft part 41 is consistent with the center of the axle in countershaft portion 42, be namely coaxially disposed.On the other hand, the centrally disposed of the axle of eccentric axial portion 43 is deviate from the center of main shaft part 41, the axle in countershaft portion 42. If main shaft part 41, countershaft portion 42 rotate centered by the center of axle, then eccentric axial portion 43 carries out eccentric rotary. By the mode of shrunk fit or press-in, the rotor 22 of mechanism portion 2 being fixed on main shaft part 41, the rotary-piston 32 of cylindric shape is assemblied in eccentric axial portion 43 sliding freely.

Additionally, as the enlarged drawing of the bent axle 4 of Fig. 4, the outer peripheral face in the radial direction of eccentric axial portion 43 is provided with the protuberance 44 around the eccentric axial portion prominent banding of 43 1 weeks. And, rotary-piston 32 is chimeric in the way of having the gap of tens microns between the outer peripheral face A of the radial direction of protuberance 44 and the inner peripheral surface of the internal diameter of rotary-piston 32. On the other hand, in the outer peripheral face of the radial direction of eccentric axial portion 43 as the outer peripheral face B of non-projecting portion, outer peripheral face C, do not contact with rotary-piston 32 with the gap in the gap between the inner peripheral surface of the internal diameter of rotary-piston 32 with a few millimeter. That is, outer peripheral face A is sliding surface, and outer peripheral face B, outer peripheral face C are non-slip face. Thus, additionally it is possible to reduce the slide area of rotary-piston 32 and eccentric axial portion 43, reduce friction and reduce slippage loss. Additionally, in fig. 2, protuberance 44 is formed around the shape of the eccentric axial portion banding of 43 1 weeks, but to be not necessarily provided around a week of 360 °, is also not necessarily banding. Otch can be formed vertically in a part for protuberance 44.

Additionally, example so that protuberance 44 to be arranged at eccentric axial portion 43 is illustrated in the diagram, but even if relief portion or protuberance are set in rotary-piston 32 side, it also is able to the outer peripheral face at the inner peripheral surface of internal diameter of rotary-piston 32 and the radial direction of eccentric axial portion 43 and sliding surface and non-slip face are set, further, it is possible to form the gap in the gap of a few millimeter between the outer peripheral face of the inner peripheral surface of internal diameter of rotary-piston 32 and the radial direction of eccentric axial portion 43.

At the hollow hole being provided centrally with cylindrical shape of the axle of bent axle 4, this hollow hole becomes the oil passage 45 that the refrigerator oil of the bottom to hermetic container 1 is carried. The oil passage 45 axial end face in countershaft portion 42 has peristome 46. The side, countershaft portion 42 of bent axle 4 is immersed in the refrigerator oil of the bottom being accumulated in hermetic container 1. By oil passage 45 and by the centrifugal pump effect produced when bent axle 4 rotates and being formed as the high-pressure space of full higher pressure refrigerant gas in hermetic container 1 and being formed as sucking the pressure reduction effect between the low-voltage space having low pressure refrigerant gas in compression mechanical part 3, draw, from the peristome 46 in countershaft portion 42, the refrigerator oil stockpiled. The refrigerator oil drawn is supplied to each sliding part of compression mechanical part 3. Hereinafter each sliding part being supplied to refrigerator oil is described.

As Fig. 2, Fig. 3, compression mechanical part 3 is configured to include cylinder body 31, rotary-piston 32, upper bearing (metal) 33, lower bearing 34 and blade 35. Cylindric inner space and the cylinder body room 36 of axial both ends open it is provided with at cylinder body 31. It is accommodated with the eccentric axial portion 43 of bent axle 4 in the cylinder body room 36 of cylinder body 31 and is assemblied in the rotary-piston 32 of eccentric axial portion 43. And, eccentric axial portion 43 i.e. rotary-piston 32 carries out eccentric rotary because of the rotation of bent axle 4 in the cylinder body room 36 of cylinder body 31.

Being radially arranged blade groove 37 at cylinder body 31 along its cylinder body room 36, the side of this blade groove 37 is at cylinder body room 36 opening, and opposite side is at back pressure chamber 38 opening.Being accommodated with at blade groove 37 and be generally shaped like rectangular-shaped blade 35, blade 35 slides while moving back and forth at blade groove 37. Back pressure chamber 38 is provided with spring, blade 35 is extruded to the cylinder body room 36 of cylinder body 31 from blade groove 37, and make the front end of blade 35 abut with rotary-piston 32. That is, utilize blade 35 that the space that the outer peripheral face of the inner peripheral surface of the internal diameter by the cylinder body room 36 of cylinder body 31 and the external diameter of rotary-piston 32 is formed is divided into Liang Ge operating room.

Upper surface bolt at cylinder body 31 is fixed with upper bearing (metal) 33, and the peristome of the peristome of the axial side of cylinder body 31 and the top of the cylinder body room 36 of cylinder body 31 is closed by this upper bearing (metal) 33. That is, the upside of the Liang Ge operating room in cylinder body 31 is closed by upper bearing (metal) 33. Upper bearing (metal) 33 has: flat fixed part, and its bolt is fixed on cylinder body 31; And the bearing portion of cylindrical shape, it extends from fixation portions towards the direction with cylinder body 31 opposite direction and rotor 22. Bearing portion two ends axially have peristome, and have the connected space communicated with each other by this peristome. Connected space at this bearing portion is inserted with main shaft part 41 in the way of through from the peristome of a side to the peristome of the opposing party, and main shaft part 41 is supported. That is, main shaft part 41 i.e. bent axle 4 is supported as rotatable diametrically by upper bearing (metal) 33.

Equally, the lower surface bolt at cylinder body 31 is fixed with lower bearing 34, and the peristome of the peristome of the axial opposite side of cylinder body 31 and the lower section of the cylinder body room 36 of cylinder body 31 is closed by this lower bearing 34. That is, the downside of the Liang Ge operating room in cylinder body 31 is closed by lower bearing 34. Lower bearing 34 has: flat fixed part, and its bolt is fixed on cylinder body 31; And the bearing portion of cylindrical shape, it extends from fixation portions towards the direction with cylinder body 31 opposite direction and the bottom of hermetic container 1. Bearing portion two ends axially have peristome, and have the connected space communicated with each other by this peristome. Connected space at this bearing portion is inserted with countershaft portion 42 in the way of through from the peristome of a side to the peristome of the opposing party, and countershaft portion 42 is supported. That is, countershaft portion 42 i.e. bent axle 4 is supported as rotatable diametrically by lower bearing 34.

As Fig. 4, Fig. 5, the such as lower surface of the axial outer peripheral face of eccentric axial portion 43 is formed as including: outer peripheral face D, and it is the plane axially at a right angle with bent axle 4; And outer peripheral face E, it is directed towards the radial direction of eccentric axial portion 43 and the outer peripheral face of eccentric direction and rolls oblique plane towards main shaft part 41. Therefore, eccentric axial portion 43 is with the outer peripheral face D of eccentric axial portion 43 planar slide relative to eccentric axial portion 43 side of lower bearing 34. On the other hand, outer peripheral face E does not contact with the plane of eccentric axial portion 43 side of lower bearing 34, is formed with space and gap betwixt. That is, outer peripheral face D is sliding surface, and outer peripheral face E is non-slip face, and becomes the relief portion of the side, countershaft portion 42 of eccentric axial portion 43. Thus, additionally it is possible to reduce the slide area of lower bearing 34 and eccentric axial portion 43, reduce friction and reduce slippage loss. Although additionally, outer peripheral face D and outer peripheral face E is divided by datum line J, but continuous print plane. Datum line J is set to the arc-shaped that the center of the axle with bent axle 4 is starting point.

Additionally, the example so that the outer peripheral face E of eccentric axial portion 43 to be set to the plane of inclination is illustrated in Fig. 4, Fig. 5 but it also may be configured to the plane in eccentric axial portion 43 side of lower bearing 34 and be provided with relief portion.Sliding surface and non-slip face can be set in the plane of the plane of eccentric axial portion 43 side of lower bearing 34 and lower bearing 34 side of eccentric axial portion 43, it is possible between plane and the plane of lower bearing 34 side of eccentric axial portion 43 in eccentric axial portion 43 side of lower bearing 34, form gap.

Additionally, Fig. 5 is the figure of the bent axle 4 observing Fig. 4 from side, countershaft portion 42.

Additionally, as shown in Figure 6, eccentric direction refers to: by the straight line of the central link of the axle at the center of the axle at the center of the axle of bent axle 4 and main shaft part 41 and countershaft portion 42 and eccentric axial portion 43, than central side by the axle of eccentric axial portion 43 of main shaft part 41 and countershaft Bu42Zhou center and be benchmark with main shaft part 41 and countershaft Bu42Zhou center ± scope of 90 °. Therefore, anti-eccentric direction refers to: by the straight line of the central link of the axle at the center of main shaft part 41 and the axle in countershaft portion 42 and eccentric axial portion 43, than eccentric axial portion 43 axle center by main shaft part 41 and countershaft portion 42 axle central side and be benchmark with main shaft part 41 and countershaft Bu42Zhou center ± scope of 90 °.

Equally, the upper surface of the axial outer peripheral face of eccentric axial portion 43 is formed as including: outer peripheral face F, and it is the plane axially at a right angle with bent axle 4; And outer peripheral face G, it is directed towards the radial direction of eccentric axial portion 43 and the outer peripheral face of eccentric direction and rolls oblique plane towards countershaft portion 42. Between the plane of eccentric axial portion 43 side of outer peripheral face G and upper bearing (metal) 33, space that the space that is formed between than the plane of eccentric axial portion 43 side of outer peripheral face F and upper bearing (metal) 33 is big and gap. And, it becomes the relief portion of main shaft part 41 side of eccentric axial portion 43. Additionally, although not shown, but identical with Fig. 5, outer peripheral face F and outer peripheral face G is divided by datum line K, and is continuous print plane. Datum line K is set to the arc-shaped that the center of the axle with bent axle 4 is starting point.

Upper surface for the axial outer peripheral face of eccentric axial portion 43 is also identical with lower surface, example so that the outer peripheral face G of eccentric axial portion 43 to be set to the plane of inclination is illustrated but it also may is configured to the plane in eccentric axial portion 43 side of upper bearing (metal) 33 and is provided with relief portion. Non-slip face can be set in the plane of the plane of eccentric axial portion 43 side of upper bearing (metal) 33 and upper bearing (metal) 33 side of eccentric axial portion 43, it is possible between plane and the plane of upper bearing (metal) 33 side of eccentric axial portion 43 in eccentric axial portion 43 side of upper bearing (metal) 33, form gap.

Cylinder body 31 is provided with the inhalation port for being drawn into by refrigerant gas in the cylinder body room 36 of cylinder body 31 from the outside of hermetic container 1, and this inhalation port connects with the operating room of the side split by blade 35. It addition, be provided with the discharge port for being discharged by the refrigerant gas after compression to the outside of the cylinder body room 36 of cylinder body 31 at upper bearing (metal) 33, this discharge port connects with the operating room of the opposing party split by blade 35.

Discharge port at upper bearing (metal) 33 is provided with dump valve, till the refrigerant gas after work interior compression reaches the pressure of regulation, dump valve cutting out, if reaching more than the pressure of regulation, making dump valve opening to be discharged in hermetic container 1 by the refrigerant gas of High Temperature High Pressure. Thus, the discharge moment of the refrigerant gas discharged from cylinder body 31 is controlled.

Carry towards the discharge pipe 11 of the top being in hermetic container 1 for being expelled to refrigerant gas in hermetic container 1, and described refrigerant gas is sent to from discharge pipe 11 outside of hermetic container 1.Now, refrigerant gas is from the stator 21 of mechanism portion 2 gap with rotor 22 and is arranged at the air holes of rotor 22 and passes through, and is carried upward.

Being connected to absorbing silencer (muffler) 101 at inhalation port via sucking connecting piece 12, this absorbing silencer 101 is arranged at the outside of hermetic container 1. Refrigerant gas and the liquid refrigerant of the low pressure mixed is carried from the loop of the outside being connected with hermetic type compressor 100 to hermetic type compressor 100. If liquid refrigerant is flowed into compression mechanical part 3 and is compressed, the fault of compression mechanical part 3 can be caused, therefore, in absorbing silencer 101, liquid refrigerant be separated with refrigerant gas, only refrigerant gas is delivered to compression mechanical part 3.

As it is shown in fig. 7, be provided with condenser 102, expansion valve 103 and vaporizer 104 in the outside of hermetic type compressor 100, it is consequently formed refrigerating circuit. That is, formed from the discharge pipe 11 of hermetic type compressor 100 via condenser 102, expansion valve 103 and vaporizer 104 the circular loop that is connected with absorbing silencer 101 by pipe arrangement. Cold-producing medium is at this loop internal recycle, thus carry out heat exchange in condenser 102 and vaporizer 104 with air and water etc., forms the kind of refrigeration cycle of conveying heat energy, thus achieves heat pump assembly. Additionally, 105 is cross valve, the direct route for refrigerant cycle is carried out reversion switching by it. Namely, for sequential flowing according to condenser 102, expansion valve 103, vaporizer 104 and absorbing silencer 101 of the cold-producing medium discharged from hermetic type compressor 100 direct route returning to hermetic type compressor 100, cross valve 105 is utilized to be switched to so that the cold-producing medium discharged from hermetic type compressor 100 according to the sequential flowing of vaporizer 104, expansion valve 103, condenser 102 and absorbing silencer 101 and returns to hermetic type compressor 100. Thus, make the conveying reversion of heat energy that refrigeration is switched over heating. When making by the way reversion, condenser 102 is function as vaporizer, and vaporizer 104 is function as condenser.

It follows that the action of compression mechanical part 3 is illustrated. First, as shown in Figure 8, the operating room connected with inhalation port sucks the refrigerant gas of low pressure. The operating room of refrigerant gas having sucked low pressure from inhalation port is mobile in cylinder body 31 because of the rotary-piston 32 i.e. eccentric rotary of eccentric axial portion 43, so that disconnect with the connection of inhalation port. Further, make the smaller volume of operating room because rotary-piston 32 carries out eccentric rotary, the refrigerant gas sucked is compressed. Along with the carrying out of the eccentric rotary of rotary-piston 32, operating room connects with discharge port. When operating room connects with discharge port and the dump valve that discharge port is closed is made discharge port opening, the refrigerant gas of the high pressure in operating room is discharged to via discharge port in hermetic container 1. Further, if rotary-piston 32 carries out eccentric rotary, then make the connection with discharge port disconnect, and again connect with inhalation port. Above-mentioned a series of action is carried out in the period that cylinder body 31 inward turning turns around at rotary-piston 32. Additionally, when the operating room of the side in Liang Ge operating room sucks refrigerant gas, the opposing party carries out the action of discharging refrigerant gas. Therefore, in operating room, become the suction chamber of low-voltage space across the operating room connecting and sucking low pressure refrigerant gas with inhalation port of blade 35, become the discharge chambe of high-pressure space across the operating room connecting and discharging higher pressure refrigerant gas with discharge port of blade 35.Additionally, the discharge volume of the cold-producing medium of compressor is determined by the volume of the operating room of compression mechanical part.

Owing to compression mechanical part 3 is formed as constituted above, therefore sliding position is more, supplies refrigerator oil in order to ensure the lubricity of this sliding position to sliding position. It addition, in compression mechanical part 3, in order to the refrigerant gas after preventing compression leaks from high side to low side, utilize refrigerator oil by the clearance seal between parts and parts. Refrigerator oil it is also supplied with for this.

Such as shown in Fig. 4, the outer peripheral face in the countershaft portion 42 near the side, countershaft portion 42 and eccentric axial portion 43 of the countershaft portion 42 of bent axle 4 and the connecting portion of eccentric axial portion 43, the oil supplying hole 47 connected with oil passage 45 is in the eccentric direction upper shed of eccentric axial portion 43. Oil supplying hole 47 is utilized to supply the refrigerator oil drawn by oil passage 45 between countershaft portion 42 and eccentric axial portion 43 and lower bearing 34. Thus, between the surface of the surface of lower bearing 34 side of eccentric axial portion 43 and eccentric axial portion 43 side of lower bearing 34, form oil film and guarantee sliding and sealing. It addition, form oil film and guarantee sliding and sealing between the surface of the surface of lower bearing 34 side in countershaft portion 42 and the side, countershaft portion 42 of lower bearing 34.

Equally, the outer peripheral face of the main shaft part 41 near the main shaft part 41 and main shaft part 41 side of connecting portion of eccentric axial portion 43, i.e. eccentric axial portion 43 of bent axle 4, the oil supplying hole 48 connected with oil passage 45 is in the eccentric direction upper shed of eccentric axial portion 43. Oil supplying hole 48 is utilized to supply the refrigerator oil drawn by oil passage 45 between main shaft part 41 and eccentric axial portion 43 and upper bearing (metal) 33. Thus, between the surface of the surface of upper bearing (metal) 33 side of eccentric axial portion 43 and eccentric axial portion 43 side of upper bearing (metal) 33, form oil film and guarantee sliding and sealing. It addition, thus, form oil film and guarantee sliding and sealing between the surface of the surface of upper bearing (metal) 33 side of main shaft part 41 and main shaft part 41 side of upper bearing (metal) 33.

It addition, as it is shown in figure 5, in eccentric axial portion 43, with the eccentric direction opposite direction of eccentric axial portion 43, i.e. anti-eccentric direction side, be provided with the otch 49 cut vertically, thus forming space between the inner peripheral surface of the internal diameter of rotary-piston 32. The oil supplying hole 50 connected with oil passage 45 is at this space openings. That is, oil supplying hole 50 is formed by peristome 51 and oil passage 52, and this peristome 51 is arranged at the outer peripheral face of the anti-eccentric direction of otch 49, i.e. eccentric axial portion 43. Utilize oil supplying hole 50 to supply the refrigerator oil drawn by oil passage 45 to the space being formed with otch 49, and the refrigerator oil lodging in this space is supplied between eccentric axial portion 43 and rotary-piston 32. Thereby, it is possible to form oil film between eccentric axial portion 43 side end face of rotary-piston 32 side end face of eccentric axial portion 43 and rotary-piston 32 and guarantee sliding.

Oil supplying hole 50 is closed and the supply that hinders refrigerator oil additionally, arrange the inner peripheral surface that otch 49 is internal diameter in order to not make rotary-piston 32.

Additionally, the space formed by the inner peripheral surface of otch 49 with the internal diameter of rotary-piston 32 connects with the space formed with the inner peripheral surface of the internal diameter of rotary-piston 32 by the outer peripheral face B or outer peripheral face C of eccentric axial portion 43, utilizes the refrigerator oil that oil supplying hole 50 supplies to be supplied to the outer peripheral face of the eccentric direction of eccentric axial portion 43 via these spaces above-mentioned.

Further, the outer peripheral face B of eccentric axial portion 43 space formed with the inner peripheral surface of the internal diameter of rotary-piston 32 also connects with the space formed by the plane of the outer peripheral face E of eccentric axial portion 43 with eccentric axial portion 43 side of lower bearing 34.Therefore, the refrigerator oil that oil supplying hole 50 supplies is utilized to be also supplied to the space formed by the plane of the outer peripheral face E of eccentric axial portion 43 Yu eccentric axial portion 43 side of lower bearing 34.

Equally, the outer peripheral face C of eccentric axial portion 43 space formed with the inner peripheral surface of the internal diameter of rotary-piston 32 also connects with the space formed by the plane of the outer peripheral face G of eccentric axial portion 43 with eccentric axial portion 43 side of upper bearing (metal) 33. Therefore, the refrigerator oil that oil supplying hole 50 supplies is utilized to be also supplied to the space formed by the plane of the outer peripheral face G of eccentric axial portion 43 Yu eccentric axial portion 43 side of upper bearing (metal) 33.

It is transported to the rotary-piston 32 more farther than the outer peripheral face of the radial direction of eccentric axial portion 43 from the refrigerator oil of oil supplying hole 47,48,50 supply by centrifugal force produced when bent axle 4 rotates, and also is flowed between rotary-piston 32 and upper bearing (metal) 33, lower bearing 34. Thus; between end face and the end face of eccentric axial portion 43 side of upper bearing (metal) 33 in upper bearing (metal) 33 side of rotary-piston 32 and between the end face of eccentric axial portion 43 side of the end face of lower bearing 34 side of rotary-piston 32 and lower bearing 34, it is also possible to form oil film respectively and guarantee sliding and sealing.

Additionally, from oil supplying hole 47,48,50 supply and the remaining refrigerator oil that is not kept as the oil film of sliding position from the gap between bent axle 4 and upper bearing (metal) 33 and lower bearing 34 by and be discharged in hermetic container 1, or enter in operating room and be expelled in hermetic container 1 from outlet. The refrigerator oil being expelled in hermetic container 1 returns to the bottom of hermetic container 1, and is again drawn by oil passage 45.

But, in order to make miniaturization and the air conditioner of high output, hermetic type compressor is also required to realize profile is small-sized and discharge volume is jumbo compression mechanical part. Additionally; for environment of preserving our planet; if not increasing its circulating load in refrigerant loop for the cold-producing medium used when low compression in the cold-producing medium that suggestion uses, then will not realize the potentiality identical with existing cold-producing medium, it is therefore desirable to realize the compression mechanical part that discharge volume is big.

As the expansion method of discharge volume, the method that there is the cylinder body arranging multiple compression mechanical part, but when arranging multiple cylinder body, compressor is also in axially i.e. elongation in short transverse, therefore in the miniaturization of profile and insufficient. It addition, cause that because arranging multiple cylinder body compression mechanical part also becomes complicated, the increase of parts number of packages, for guaranteeing the increase of design burden of reliability, the lifting of cost all becomes notable.

For the size of compressor maintained the statusquo or so as to miniaturization and expand discharge volume, it is most preferred that maintain the offset that the internal diameter of the cylinder body room of compression mechanical part increases the eccentric axial portion of bent axle unchangeably.

But, as the figure of the bent axle 4 of Fig. 9, the datum line L of outer peripheral face, the datum line N of the anti-eccentric direction side being in eccentric axial portion 43 in the outer peripheral face of the datum line M of the outer peripheral face of the anti-eccentric direction in the outer peripheral face of the radial direction of eccentric axial portion 43 and the radial direction in main shaft part 41 and countershaft portion 42 are arranged in the structure on straight line, when expanding the offset of eccentric axial portion 43, as shown in Figure 10 (a), Figure 10 (b), it is necessary to increase the diameter of eccentric axial portion 43 and reduce the external diameter of rotary-piston 32. That is, the wall thickness of the radial direction of thinning rotary-piston 32.

Figure 10 (a), Figure 10 (b) are the figure of the situation during offset illustrating and expanding eccentric axial portion 43, Figure 10 (a) is the figure of the situation that the offset before illustrating expansion offset is less, Figure 10 (b) be the cylinder body room 36 being shown in and not changing Figure 10 (a) size, namely do not change the inner peripheral surface of the radial direction of cylinder body 31 position make datum line L, M, N of bent axle 4 be arranged in the structure on straight line, expand the figure of situation that the offset after the offset of eccentric axial portion 43 increases.

Datum line L, M, N are by following straight line and main shaft part 41, countershaft portion 42, point that the outer peripheral face of anti-eccentric direction of eccentric axial portion 43 intersects are linked the line formed, wherein, described straight line is by the straight line at the center of eccentric axial portion 43 with main shaft part 41, the central link in countershaft portion 42.

Be formed as the datum line M of eccentric axial portion 43 and structure that the datum line L in main shaft part 41 and countershaft portion 42, datum line N are arranged on straight line, it be not arranged in the structure on straight line, the cylindric rotary-piston 32 inserted from main shaft part 41 or countershaft portion 42 cannot be inserted into eccentric axial portion 43, and rotary-piston 32 cannot be assembled in eccentric axial portion 43. Therefore, in order to rotary-piston 32 is assembled in bent axle 4, it is necessary to be constructed so that the datum line L of the outer peripheral face of the anti-eccentric direction in each axle portion, datum line M, datum line N are arranged on straight line.

On the other hand, when increasing the diameter of eccentric axial portion 43, become remote from the distance of the outer peripheral face of the eccentric direction of oil supplying hole 47, the radial direction of 48 to eccentric axial portion 43 and the outer peripheral face of eccentric direction and rotary-piston 32, the power that therefore refrigerator oil is delivered to these outer peripheral faces above-mentioned dies down, thus refrigerator oil is difficult to arrive each outer peripheral face from oil supplying hole 47,48. That is, the supply of refrigerator oil is interrupted, and refrigerator oil becomes insufficient to the supply of each outer peripheral face, and lubricity reduces, and the abrasion of parts is accelerated or sliding position is sustained damage.

When the radial thickness of rotary-piston 32 is thinning, the area of the axial end of rotary-piston 32 reduces, the maintenance dose of the refrigerator oil kept between axial end and the plane of rotary-piston 32 side of upper bearing (metal) 33 in upper bearing (metal) 33 side of rotary-piston 32 or between the plane of rotary-piston 32 side of the axial end of lower bearing 34 side of rotary-piston 32 and lower bearing 34 reduces, thus causing the interruption of fuel feeding. Particularly in the axial end of the rotary-piston 32 on the eccentric direction being in eccentric axial portion 43, due to the peristome apart from oil supplying hole 47,48,50 farther out, therefore the supply of refrigerator oil is interrupted, and refrigerator oil is exhausted, and the abrasion of sliding position is accelerated or sliding position is sustained damage.

In order to prevent the interruption of fuel feeding, further contemplate that the diameter by increasing oil supplying hole or the method increasing the number of oil supplying hole and increasing the quantity delivered of refrigerator oil, but the remaining oil that cannot be held in sliding position also increases to some extent. Although remaining oil is discharged in hermetic container 1, but it is not returned directly to the bottom of hermetic container 1, there is the oil returning to hermetic container 1 from discharge pipe 11 via the external circuit being connected with hermetic type compressor 100 and condenser 102, expansion valve 103, vaporizer 104, absorbing silencer 101. On the other hand, even if the refrigerator oil of circulation increases in external circuit, refrigerator oil is also carry out heat exchange at condenser 102 and vaporizer 104, rather than is evaporated or condenses, and therefore, the conveying for the heat energy of heat pump assembly does not contribute. The circulating load that only can make cold-producing medium reduces. Therefore, if the refrigerator oil of circulation increases in external circuit, then can hinder the heat exchange of cold-producing medium in vaporizer 104 and condenser 102 so that the efficiency of kind of refrigeration cycle reduces, and then the performance making heat pump assembly overall reduces. If it addition, the refrigerator oil in hermetic container 1 is excessively brought to outside, then exhausted to the refrigerator oil of sliding position supply so that sliding position sustains damage. Therefore, it is undesirable that the increase of remaining oil.

Additionally, such as Figure 11, Figure 12 is such, the eccentric direction of eccentric axial portion 43 is provided for oilhole, when the refrigerant gas that cylinder body is indoor is compressed by rotary-piston 32, the counteracting force of the refrigerant gas that rotary-piston 32 bears is passed to the oil film formed at rotary-piston 32 with eccentric axial portion 43, and the refrigerator oil of the oil supplying hole on the eccentric direction of eccentric axial portion 43, become along being arranged at the oil supplying hole of eccentric direction of eccentric axial portion 43 from the outer peripheral face of the eccentric direction of eccentric axial portion 43 towards the power of oil passage 45, thus producing not discharge refrigerator oil from the oil supplying hole being arranged at eccentric direction, or refrigerator oil is pressed back into the state of oil passage 45.

Additionally, Figure 11 is figure, the Figure 12 from countershaft side observation bent axle 4 is from the figure radially observing bent axle 4.

In being arranged at the oil supplying hole of eccentric direction of eccentric axial portion 43, the centrifugal force (Fa) that refrigerator oil produces by the rotation because of bent axle 4 is transported to the outer peripheral face of the eccentric direction of eccentric axial portion 43 in oil supplying hole from oil passage 45, and is discharged at this outer peripheral face. On the other hand, when the refrigerant gas being drawn into cylinder body Shi Ji operating room is compressed by rotary-piston 32, the counteracting force (Fb) that the refrigerant gas after compression is intended to restore and expands puts on rotary-piston 32. The counteracting force putting on the cold-producing medium of rotary-piston 32 puts on the outer peripheral face of the eccentric direction of the oil film between rotary-piston 32 and eccentric axial portion 43 and eccentric axial portion 43 via rotary-piston 32. Put on oil film and trying hard to keep of refrigerator oil hold the refrigerator oil being transferred to oil supplying hole as former state, become along oil supplying hole from the outer peripheral face of the eccentric direction of eccentric axial portion 43 towards the power of oil passage 45, namely with the power that plays a role the centrifugal force opposite direction of bent axle 4. Hinder refrigerator oil to the discharge of the outer peripheral face of the eccentric direction of eccentric axial portion 43 because of this power, and make refrigerator oil be pressed back into oil passage 45 because of this power.

Particularly when oil passage is longer, above-mentioned phenomenon is notable. The refrigerator oil being arranged in the oil supplying hole of eccentric direction is formed as immobilising state or reciprocal state between this peristome and oil passage 45, produces the phenomenon that cannot be discharged by refrigerator oil from peristome. It addition, when making the counteracting force of refrigerant gas increase in the rotating speed increase due to the expansion of discharge volume or compression mechanical part etc., above-mentioned phenomenon also becomes more significantly. Thus, it is impossible to from oil supplying hole fuel feeding on eccentric direction, refrigerator oil is exhausted so that sliding position sustains damage.

Additionally, it is arranged at the oil supplying hole of eccentric direction in the same plane with oil supplying hole 50 in the plane axially at a right angle with bent axle 4, and bent axle 4 be radially set to across oil passage 45 opposed, and, oil supplying hole at eccentric direction is identical with the diameter of oil supplying hole 50 or being relatively large in diameter of the oil supplying hole of eccentric direction, the plane at a right angle with the radial direction of bent axle 4 is utilized to carry out when the sectional area of cutting gained is consistent or the sectional area of the oil supplying hole of eccentric direction is bigger, oil supplying hole for eccentric direction is applied with bigger centrifugal force, therefore, the counteracting force of refrigerant gas upon compression reduces, and for the oil film between rotary-piston 32 and eccentric axial portion 43, and the refrigerator oil of the oil supplying hole of the eccentric direction of eccentric axial portion 43 is not when transmitting bigger power, substantial amounts of refrigerator oil can be attracted from oil passage 45. therefore, the refrigerator oil in oil passage 45 is exhausted, utilizes the oil supplying hole 50 that centrifugal force reduces cannot attract refrigerator oil from oil passage 45. thus, the supply from the refrigerator oil of oil supplying hole 50 reduces or interrupts, and from sliding position, refrigerator oil becomes easier to exhaustion.

On the other hand, the counteracting force of refrigerant gas upon compression is relatively big and when bigger power is transferred to the refrigerator oil of oil supplying hole of eccentric direction of the oil film between rotary-piston 32 and eccentric axial portion 43 and eccentric axial portion 43, utilize the refrigerator oil of the oil supplying hole that oil supplying hole 50 absorbs across oil passage 45 on opposed eccentric direction, hinder the discharge of refrigerator oil. Therefore, fuel feeding is easier to interrupt, and refrigerator oil is easier to exhaustion.

Therefore, in hermetic type compressor 100, radial direction as Figure 13, Figure 14, Figure 15, Figure 16 and the oil passage on eccentric direction, oil supplying hole and oil passage axially, oil supplying hole are set in eccentric axial portion 43 such that it is able to by the outer peripheral face on the eccentric direction of the outer peripheral face in refrigerator oil supply to the radial direction and eccentric direction of eccentric axial portion 43 and rotary-piston 32.Figure 13 is the enlarged drawing of the profile of bent axle 4, and Figure 14 is the figure of the bent axle 4 observing Figure 12 from side, countershaft portion 42. Figure 15 is for supplementing Figure 13, utilizing the Z-Z ' line with radial direction plane at a right angle that is Figure 14 that bent axle 4 carries out the sectional view of cutting gained. Figure 16 is the supplementary figure of above-mentioned accompanying drawing.

Specifically, in eccentric axial portion 43, it is provided for oilhole 53 and oil supplying hole 54 as the first oil supplying hole, they connect with oil passage 45 and at its outer peripheral face opening radially and on eccentric direction, and, second oil supplying hole is provided with axial oil supplying hole 55, and it connects with oil supplying hole 53 and oil supplying hole 54. It addition, as the oil supplying hole 55 of the second oil supplying hole at the first gap 65,66 (figure 16 illustrates) opening being formed between the plane of eccentric axial portion 43 side of lower bearing 34 and the non-slip face of eccentric axial portion 43 that is outer peripheral face E and between the plane of eccentric axial portion 43 side of upper bearing (metal) 33 and the non-slip face of eccentric axial portion 43 that is outer peripheral face G. As the second gap 67,68 (figure 16 illustrates) opening between the non-slip face being formed at the inner peripheral surface of internal diameter of rotary-piston 32 and eccentric axial portion 43 that is outer peripheral face B and C of the oil supplying hole 53,54 of the first oil supplying hole.

The eccentric direction of the eccentric axial portion 43 that oil supplying hole 53 is in the outer peripheral face of the radial direction of eccentric axial portion 43, and be formed as including: peristome 56, it is at the outer peripheral face B opening as non-projecting portion and non-slip face; And oil passage 60, oil passage 45 is connected by it with peristome 56. Oil passage 60 is set to be not on same plane with the oil supplying hole 50 arranged as the 3rd oil supplying hole in the plane axially at a right angle with bent axle 4. Such as, oil supplying hole 53 bent axle 4 axially and connect with oil passage 45 between the position that the position that oil supplying hole 47 connects with oil passage 45 and oil supplying hole 50 connect with oil passage 45. Thus, oil supplying hole 53 is not opposed across oil passage 45 with oil supplying hole 50. Oil supplying hole 47 is arranged at countershaft portion 42, therefore, even if oil supplying hole 53 connects with oil passage 45 between the position that axial outer peripheral face and the oil supplying hole 50 of the eccentric axial portion 43 axially and in side, countershaft portion 42 of bent axle 4 connects with oil passage 45, also obtain same result. On the other hand, it is also possible to radially opposed across oil passage 45 at bent axle 4.

It addition, oil supplying hole 53 is configured at the inner peripheral surface of the internal diameter by rotary-piston 32 and the outer peripheral face B of eccentric axial portion 43 the second gap 67 opening formed such that it is able to discharge refrigerator oil to this gap 67.

Refrigerator oil is transported to peristome 56 by because of the rotating the centrifugal force produced of bent axle 4 from oil passage 45.

Equally, oil supplying hole 54 is on the eccentric direction of the eccentric axial portion 43 in the outer peripheral face of the radial direction of eccentric axial portion 43, and is formed as including: peristome 57, and it is at the outer peripheral face C opening as non-projecting portion and non-slip face; And oil passage 61, oil passage 45 is connected by it with peristome 57. Oil passage 61 is set to be not on same plane with the oil supplying hole 50 arranged as the 3rd oil supplying hole in the plane axially at a right angle with bent axle 4. Such as, oil passage 61 bent axle 4 axially and connect with oil passage 45 between the position that the position that oil supplying hole 48 connects with oil passage 45 and oil supplying hole 50 connect with oil passage 45. Thus, oil supplying hole 54 is not opposed across oil passage 45 with oil supplying hole 50. Owing to oil supplying hole 48 is arranged at main shaft part 41, therefore, even if oil supplying hole 54 connects with oil passage 45 between the position that axial outer peripheral face and the oil supplying hole 50 of the eccentric axial portion 43 axially and in main shaft part 41 side of bent axle 4 connects with oil passage 45, also obtain same result.On the other hand, it is also possible to radially opposed across oil passage 45 at bent axle 4.

It addition, oil supplying hole 54 is configured to the second gap 68 opening formed at the inner peripheral surface of the internal diameter by rotary-piston 32 and the outer peripheral face C of eccentric axial portion 43 such that it is able to discharge refrigerator oil to this gap 68.

Refrigerator oil is transported to peristome 57 by because of the rotating the centrifugal force produced of bent axle 4 from oil passage 45.

Further, oil supplying hole 53 and oil supplying hole 54 are set as: the summation making sectional area on direction at a right angle, the direction flowed wherein with refrigerator oil is less than the sectional area on the direction at a right angle with the direction that the refrigerator oil of oil supplying hole 50 flows. specifically, the direction flow the refrigerator oil being in oil passage 60 of oil supplying hole 53 and bent axle 4 are radially, and utilize and sectional area that this radial direction plane at a right angle carries out on the direction that the sectional area of cutting gained is namely at a right angle with the radial direction of bent axle 4 is set to a, the direction flow the refrigerator oil being in oil passage 61 of oil supplying hole 54 and bent axle 4 are radially, and utilize and sectional area that this radial direction plane at a right angle carries out on the direction that the sectional area of cutting gained is namely at a right angle with the radial direction of bent axle 4 is set to b, the direction flow the refrigerator oil being in oil passage 52 of oil supplying hole 50 and bent axle 4 are radially, and utilize and sectional area that this radial direction plane at a right angle carries out on the direction that the sectional area of cutting gained is namely at a right angle with the radial direction of bent axle 4 is set to c, in this case, it is set as (a+b) < c. further, sectional area a, b, c be preferably formed to the summation of the size y of the size x of the oil passage 60 of oil supplying hole 53 and the oil passage 61 of oil supplying hole 54, relative to the ratio (inverse proportion) of size z of oil passage 52 of oil supplying hole 50.

Oil supplying hole 55 is formed as including: peristome 58, and it is at eccentric axial non-slip face that is outer peripheral face E opening; Peristome 59, it is at eccentric axial non-slip face that is outer peripheral face G opening; Oil passage 62, peristome 58 is connected by it with oil passage 60; Oil passage 63, peristome 59 is connected by it with oil passage 61; And oil passage 64, oil passage 60 is connected by it with oil passage 61, and is provided for oil circuit 62,63,64 in the way of the peristome 59 to outer peripheral face G through from the peristome 58 of outer peripheral face E.

Thus, peristome 58 is configured at the first gap 65 opening being formed between plane and the outer peripheral face E of eccentric axial portion 43 of eccentric axial portion 43 side of lower bearing 34 such that it is able to discharge refrigerator oil to this gap 65. Peristome 59 is configured at the first gap 66 opening being formed between plane and the outer peripheral face G of eccentric axial portion 43 of eccentric axial portion 43 side of upper bearing (metal) 33. Refrigerator oil can be discharged to this gap 66.

It addition, oil supplying hole 55 is set as: the summation making the sectional area on the direction at a right angle with the direction that refrigerator oil flows of oil supplying hole 53 and oil supplying hole 54 is below the sectional area on the direction at a right angle with the direction that refrigerator oil flows of oil supplying hole 55. Specifically, by the direction of the refrigerator oil flowing being in oil passage 62,63,64 of oil supplying hole 55 and bent axle 4 axially and utilize and sectional area that this plane axially at a right angle carries out on the sectional area of cutting gained i.e. direction axially at a right angle with bent axle 4 is set to d, in this case, sectional area a and the b of oil supplying hole 53 and 54 is set as (a+b)≤d. Further, sectional area a, b, d be preferably formed to the summation of the size y of the size x of the oil passage 60 of oil supplying hole 53 and the oil passage 61 of oil supplying hole 54, relative to the ratio (inverse proportion) of size w of oil passage 62,63,64 of oil supplying hole 55.

The relation of oil supplying hole 50 with oil supplying hole 55 is not set, for instance, it is possible to it is identical diameter.

As above, oil supplying hole 53,54 is configured to: be set to be not on same plane with oil supplying hole 50 in the plane axially at a right angle with bent axle 4, the sectional area a of the oil passage 60 of oil supplying hole 53 is less than the sectional area c of the oil passage 52 of oil supplying hole 50 with the summation of the sectional area b of the oil passage 61 of oil supplying hole 54, therefore, even if the centrifugal force of eccentric direction puts on oil supplying hole 53,54, refrigerator oil is attracted in large quantities, so that oil supplying hole 50 cannot attract fridge oil condition to disappear from oil passage 45 without from oil passage 45. That is, the oil supplying hole 50 attraction to refrigerator oil will not be hindered.

On the other hand, oil supplying hole 55 opening in the axial direction, thus without being applied with centrifugal force, the carrying capacity of refrigerator oil is more weak, but by increasing its sectional area d, it is possible to reduce crushing and guarantee carrying capacity. Even if the carrying capacity of the refrigerator oil of oil supplying hole 55 is less than oil supplying hole 50,53,54, it is also possible to the supply of sufficiently conducted refrigerator oil.

It addition, oil supplying hole 53,54 is at outer peripheral face B or outer peripheral face C opening, therefore, connect with the space formed with the inner peripheral surface of the internal diameter of rotary-piston 32 by the outer peripheral face B or outer peripheral face C of eccentric axial portion 43. therefore, even if the counteracting force of the refrigerant gas after the compression that rotary-piston 32 bears when proceeding by the compression of cylinder body indoor refrigerant gas is transferred to the oil film formed at rotary-piston 32 with eccentric axial portion 43, and oil supplying hole 53, the oil passage 60 of 54, refrigerator oil in 61, in space i.e. the second gap 67 formed by the inner peripheral surface of the outer peripheral face B or outer peripheral face C of eccentric axial portion 43 Yu the internal diameter of rotary-piston 32, 68 refrigerator oils accumulated also can become padded coaming, the transmission making the counteracting force of the refrigerant gas after compression is relaxed, therefore, direction towards oil passage 45 pushes back fridge oil condition and is inhibited.

Even if dummy be added on the compression of the outer peripheral face of eccentric axial portion 43 after the counteracting force of refrigerant gas relatively big and the refrigerator oil in the oil passage 60,61 of oil supplying hole 53,54 is pushed back to the direction of oil passage 45, the refrigerator oil (Vd) pushed back as shown in Figure 16 also can collide with the refrigerator oil (Va) carry from oil passage 45 to peristome 56,57 by centrifugal force and be flowed into oil supplying hole 55. The refrigerator oil (Ve) being flowed into oil supplying hole 55 is discharged from peristome 58 to the space formed by the plane of the outer peripheral face E of eccentric axial portion 43 Yu eccentric axial portion 43 side of lower bearing 34 i.e. the first gap 65 respectively, and discharges from peristome 59 to the space formed by the plane of the outer peripheral face G of eccentric axial portion 43 Yu eccentric axial portion 43 side of lower bearing 34 i.e. the first gap 66. First gap 65 and 66 connects with the space formed with the inner peripheral surface of the internal diameter of rotary-piston 32 by the outer peripheral face B or outer peripheral face C of eccentric axial portion 43 i.e. the second gap 67,68. Space also and between rotary-piston 32 with upper bearing (metal) 33 or lower bearing 34, first the 65,66 and second gap, the gap 67,68 and gap 69,70 connect, therefore, the refrigerator oil discharged from oil supplying hole 55 also flows between eccentric axial portion 43 and rotary-piston 32 and between rotary-piston 32 and upper bearing (metal) 33 or lower bearing 34. Thus, additionally it is possible to the exhaustion of the refrigerator oil between suppression eccentric axial portion 43 and rotary-piston 32 and between rotary-piston 32 and upper bearing (metal) 33 or lower bearing 34. When particularly the counteracting force of the refrigerant gas after making compression by expanding the rotating speed getting rid of volume or increase compression mechanical part increases, this effect is also bigger.

Additionally, oil supplying hole 53,54 is set to be not on same plane with oil supplying hole 50 in the plane axially at a right angle with bent axle 4, therefore, it is possible to compression after refrigerant gas counteracting force independently from the size from oil supplying hole 53,54, oil supplying hole 50 discharge refrigerator oil.

Additionally, even if being formed as refrigerator oil immobilising state or reciprocal state in oil passage 60,61 of oil supplying hole 53,54, refrigerator oil in oil passage 60,61 also can be flowed into oil supplying hole 55 and discharge from peristome 58,59, therefore, enable to the refrigerator oil not situation disappearance of flowing in oil passage 60,61, it is possible to carry out the supply of refrigerator oil.

Additionally, the sectional area d of oil supplying hole 55 is more than the summation of sectional area a, b of oil supplying hole 53,54, therefore, even if the refrigerator oil in oil supplying hole 53,54 is difficult to be delivered to peristome 56,57 from oil passage 45 by the counteracting force of the refrigerant gas after compression, oil supplying hole 55 also can make the resistance of crushing etc. reduce so that refrigerator oil easily flows into. Discharge and also become easy. That is, when being in the situation that cannot discharge refrigerator oil from oil supplying hole 53,54, it is possible to discharge refrigerator oil energetically from oil supplying hole 55 such that it is able to the supply making up refrigerator oil is not enough.

Therefore, even if increasing the diameter of the eccentric axial portion 43 of bent axle 4, also be able to by refrigerator oil without interruptedly from the oil passage 45 of bent axle 4 via oil supplying hole 53, 54, 55 outer peripheral faces supplying the eccentric direction to eccentric axial portion 43, and the outer peripheral face of the eccentric direction of rotary-piston 32, it is thus possible between the inner peripheral surface of the outer peripheral face of eccentric direction of eccentric axial portion 43 and the internal diameter of rotary-piston 32, between the outer peripheral face of the outer peripheral face of the axial and eccentric direction of eccentric axial portion 43 and eccentric axial portion 43 side of upper bearing (metal) 33 and lower bearing 34, and between the outer peripheral face of rotary-piston 32 side of the axial outer peripheral face of rotary-piston 32 and upper bearing (metal) 33 and lower bearing 34, form oil film.

It addition, when the state for extended periods that cold-producing medium and refrigerator oil are placed at low temperatures continue time, there is cold-producing medium and can dissolve in the characteristic of refrigerator oil. In this condition, if starting compressor, then the temperature in hermetic container rises, and the cold-producing medium in refrigerator oil causes violent evaporation and foams. When causing foamed phenomenon in each oil passage, refrigerator oil does not flow in oil passage and causes failure of oil feed sometimes. Oil supplying hole on particularly less at the diameter of oil passage and eccentric direction that its path is also longer creates foamed phenomenon, fuel feeding easily interrupts. But, owing to being provided for oilhole 50 on anti-eccentric direction and being provided for oilhole 53,54 on eccentric direction, therefore, even if causing failure of oil feed because of foamed phenomenon at an oil supplying hole, it is also possible to utilize remaining oil supplying hole by the outer peripheral face of the outer peripheral face of refrigerator oil supply to the eccentric direction of eccentric axial portion 43 and the eccentric direction of rotary-piston 32.

Additionally, owing to axial oil supplying hole 55 is set to connect the oil supplying hole 53,54 of multiple eccentric directions, therefore, even if an oil passage at oil supplying hole 53,54 creates foamed phenomenon, refrigerator oil also can flow into from remaining oil passage, the state that refrigerator oil in oil passage interrupts is recovered rapidly such that it is able to the situation that freezing-inhibiting machine oil interrupts to the supply of the outer peripheral face of the outer peripheral face of the eccentric direction of eccentric axial portion 43 and the eccentric direction of rotary-piston 32.

As above, even if the height of maintenance cylinder body and internal diameter expand the offset of the eccentric axial portion of bent axle unchangeably and expand discharge volume, also be able to the eccentric direction by the outer peripheral face and rotary-piston not making outer peripheral face from the eccentric direction to eccentric axial portion failure of oil feed in the way of carry out fuel feeding, therefore, it is possible to guarantee the lubricity of the sliding position of compression mechanical part and suppress the abrasion of sliding position, and it is able to maintain that the sealing of compression mechanical part and reduces the leakage loss of discharge chambe.Thereby, it is possible to obtain high-performance and the high hermetic type compressor of reliability.

Additionally, be illustrated by the cylinder body of a compression mechanical part, a rotary-piston, single cylinder type hermetic type compressor that the eccentric axial portion of a bent axle is constituted but it also may implement in the hermetic type compressor with multiple cylinder body. Such as, even if implementing in twin-tub type hermetic type compressor, it is also possible to obtain same effect and effect.

Though it addition, the situation that rotary-piston and blade-shaped are formed as Split type structure is illustrated, even if but rotary-piston and blade-shaped be integrally forming, this effect is without change. It is obtained in that same effect and effect.

Though it addition, the example being arranged at eccentric axial oil supplying hole and being set to oil supplying hole 53,54 the two oil supplying hole is illustrated, but the number of eccentric axial oil supplying hole can arbitrarily be arranged. Even if it addition, be one, it is also possible to obtain same effect.

It addition, axial oil supplying hole can not also be only oil supplying hole 55, and it is provided with multiple. When being provided with multiple, it is also possible to obtain same effect.

It addition, the diameter of the oil passage 60,61 of oil supplying hole 53,54 is without all identical from its top to terminal. Furthermore, it is possible to take sectional area a, b now as the top average cross-section to terminal.

It addition, the diameter of the oil passage 62,63,64 of oil supplying hole 55 is without all identical from its top to terminal. The diameter of oil passage 62,63,64 can also be different.

Claims (8)

1. a hermetic type compressor, it has stockpiled refrigerator oil in hermetic container and has been accommodated with compression mechanical part,

Described hermetic type compressor is characterised by,

Described compression mechanical part possesses:

Bent axle, it has eccentric axial portion and for drawing the oil passage of described refrigerator oil;

Cylinder body, described eccentric axial portion is received and has cylinder body room by it;

Bearing, described cylinder body room is closed by it, and described bent axle is supported; And

Cylindric piston, it is installed on described eccentric axial portion,

Described eccentric axial portion has:

First oil supplying hole, it connects with the oil passage of described bent axle and has peristome at the outer peripheral face of the eccentric direction of described eccentric axial portion; And

Second oil supplying hole, it connects with described first oil supplying hole and has peristome at the axial outer peripheral face of described eccentric axial portion.

2. hermetic type compressor according to claim 1, it is characterised in that

The first gap is possessed between the axial outer peripheral face of the described compression mechanical part outer peripheral face in the cylinder body side of described bearing and described eccentric axial portion,

Described second oil supplying hole is in described first clearance opening.

3. hermetic type compressor according to claim 1 and 2, it is characterised in that

Described compression mechanical part possesses the second gap between the outer peripheral face of the inner peripheral surface of described piston and the radial direction of described eccentric axial portion,

Described first oil supplying hole is in described second clearance opening.

4. hermetic type compressor according to claim 1 and 2, it is characterised in that

Described eccentric axial portion possesses the 3rd oil supplying hole, and the 3rd oil supplying hole has peristome at the outer peripheral face of the eccentric direction opposite direction with described eccentric axial portion,

Described first oil supplying hole is arranged between the axial outer peripheral face of described eccentric axial portion and described 3rd oil supplying hole.

5. hermetic type compressor according to claim 1 and 2, it is characterised in that

It is being radially arranged multiple described first oil supplying hole.

6. hermetic type compressor according to claim 5, it is characterised in that

The plurality of first oil supplying hole is interconnected at described second oil supplying hole.

7. hermetic type compressor according to claim 4, it is characterised in that

The sectional area on direction that the radial direction with described eccentric axial portion of the 3rd oil supplying hole described in the sectional area ratio on direction that the radial direction with described eccentric axial portion of described first oil supplying hole is at a right angle is at a right angle is little.

8. hermetic type compressor according to claim 1 and 2, it is characterised in that

The sectional area on direction that the radial direction with described eccentric axial portion of described first oil supplying hole is at a right angle is below the sectional area on the direction axially at a right angle with described eccentric axial portion of described second oil supplying hole.