CN102900650A - Oil pumping system, shaft for same and hermetic compressor comprising oil pumping system and/or shaft - Google Patents
Oil pumping system, shaft for same and hermetic compressor comprising oil pumping system and/or shaft Download PDFInfo
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- CN102900650A CN102900650A CN2011102306643A CN201110230664A CN102900650A CN 102900650 A CN102900650 A CN 102900650A CN 2011102306643 A CN2011102306643 A CN 2011102306643A CN 201110230664 A CN201110230664 A CN 201110230664A CN 102900650 A CN102900650 A CN 102900650A
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Abstract
The invention discloses an oil pumping system, a shaft for the same and a hermetic compressor comprising the oil pumping system and/or the shaft. Change of the size and change of the geometric shape of the lubricating oil pumping system in the hermetic compressor are predicted, the hermetic compressor is provided with an oil pump (9) which is soaked in lubricating oil (2) and is connected with a rotating vertical shaft (5), and the rotating vertical shaft (5) is driven by a rotor (6) of an electric motor (7). The oil pumping system is provided with an oblique lubricating hole in an oblique sucker (12) and further comprises an oblique hole (12) which is additionally arranged inside the shaft (14) and is opposite to the center line of the rotating vertical shaft (5). Change of the size of a sucking hole (9a) and change of the fixing position of the oil pump (9) are further displayed while the thickness of a wall (16) of the rotating vertical shaft (5) is gradually reduced.
Description
Technical field
The present invention relates to the size of the lubricant oil pumping system in the hermetic compressor and the change of geometrical shape, described hermetic compressor has the oil pump that is immersed in the lubricant oil and is associated with the rotation vertical shaft, and described rotation vertical shaft is driven by the rotor of electric notor.Described oil pump send the inclination endoporus that system also comprises to be increased to described rotation vertical shaft, thereby so that the thickness of axial wall reduce gradually.This system also has the size of sucker and is used for the fixedly change of the position of oil pump.
Background technique
Cooling unit or even the common use of heat pump can be discontinuously or hermetic compressor that the angular velocity of the axle of compressor is changed in rotating range, this hermetic compressor can use the electric notor with the rotor that comprises permanent magnet.
In this respect, these compressors need to lubricate, and its objective is separately and help a movement of shifting to another two surfaces, and they are not caused damage.Lubricate by the oil that between parts, adds specified quantitative, thus avoid when carry out any have when mobile the part of friction with movably or any other parts of fixing have Metal Contact.Send interpolation oil here by oil pump, this carries out by the centrifugal action that the rotation owing to the axle that comprises the oil pump that is associated produces.Centrifugal action produces the parabolic outlines of oil, and its upper end will meet or exceed for the lubricating detail oily supply centre of the bearing of compressor preferably.
Therefore, can be used for the thickness (Eol) of the oil film of lubricated removable part can be according to being similar to
Theoretical formula obtain, and Re is the axle radius, R
bBe the radius of the sucker of pump, g is gravity, and h is pumping height, w
OpThe angular velocity of rotation vertical shaft.
If the angular velocity (w of rotation vertical shaft
Op) be lower than specific limiting value, then the end of the ascend curve of oil tanker exterior feature will can not reach oily supply centre, therefore will send less than being used for lubricated oil pump.The amount of institute's pump oil also depends on the radius (R of the sucker of pumping height (h) and pump
b) and the radius (Re) of rotation vertical shaft, this highly is pasta in the storage tank and the distance between the lubricant oil supply centre.
For this reason, in order to ensure effective and enough the lubricating of bearing and moving parts, current use is used for some technology of control compressor.One of technology that is used for lube pistons cylinder bearing more effectively concentrates on the structure of the pumping system on the electric notor.In this case, compressor package is assembled on the shell on the contrary.One of shortcoming of this technology is that the coil of electric notor is not immersed in the oil, and this direct contact is the most effective mode for cooling coil.If cooling effectiveness is poor, then isolate and the material that conducts motor has deteriorated effect.
In this respect, can be used for more effective another lubricated technology is to reduce pumping height by increase oil mass in storage tank.Yet, because oil mass is more, so this technology has higher cost, and there is the oily possibility that contacts with the lower surface of rotor, thereby causes rotation and the formation of oil whip, limited the ability of its lubrication and cooling system.
In addition, be used for guaranteeing that another technology of lubricating is the angular velocity of control vertical shaft.Therefore, this technology comprises the minimum limit of the rotational speed of the vertical shaft that send for oil pump, but thereby has limited the operating range of these compressors.Importantly emphasize: in case variable displacement compressor (VCC) is attempted with low rotary manipulation, then this problem becomes poorer for them.
For this reason, can illustrate by Brazilian patent PI 9706307-0 with the most similar system of the present invention, this patent attempts to provide heteroid hermetic compressor, wherein, in the situation that does not have related problem, one group of removable part in the motor is suitably lubricated, and no matter its position in structure.In this respect, hermetic compressor comprises that wherein the lower end is immersed in the lubricant oil for the passage of oil conduction, and top is associated with radial pipe.
Therefore, in these compressors, pumping efficiency is the function of the relation between the small diameter that represents of the lower end by the oil pump in the storage tank that is immersed in lubricant oil and the larger diameter that represented by the internal diameter in the section of the rotation vertical shaft that oily supply centre occurs.The value of diameter is more approaching, and lubricating efficiency is lower.
Summary of the invention
In order to overcome the problem of prior art, the present invention relates to a kind of oil pump for hermetic compressor and send system, wherein, can guarantee the proper lubrication of all compressor means, mainly be the compressor for the variable-angle speed of operation under low rotation, and elimination is to the restriction of the geometrical shape of the formation of oily parabolic outlines.
Another object of the present invention provides a kind of system, wherein, oily flow rate when may be limited to high rotation, therefore, so that the outer loop minimizing of the lubricant oil in the cooling system (at the lubricant oil of the outside pumping of compressor), thereby the cost in the thermal power system, maintenance and loss in efficiency have been reduced.
These purposes send system to realize by a kind of oil pump for hermetic compressor, this hermetic compressor comprises the storage tank for lubricant oil at least, comprise inside and outside rotation vertical shaft, the oil pump that is associated with described rotation vertical shaft, described pump is included in the sucker of lower end, and described oil pump is immersed in the described storage tank for lubricant oil, described compressor also have can be lubricated the zone, described rotation vertical shaft also is included in the slope hole in its inside, and described slope hole described lubricant oil can be directed to can be lubricated the zone, and have the axioversion degree with respect to the vertical center line of described running shaft.
In addition, the sucker of the position of described oil pump in axle, oil pump reduce and the quota of the position of inclination endoporus and the restriction of tolerance limit allow to realize above-mentioned purpose.
Description of drawings
Next according to the example of the embodiment of describing in the accompanying drawings the present invention is described in more detail.Accompanying drawing illustrates:
Fig. 1 is the section according to the part of the compressor of prior art structure;
Fig. 2 be according to the present invention's section of the part of the compressor of similar technique construction;
Fig. 3 is the section according to the rotation vertical shaft of the compressor of the constructed structure of Fig. 2;
Fig. 4 is the section according to the part of compressor of the present invention;
Fig. 5 is the diagram of current techniques situation; It at length is the oil tanker exterior feature in the interference region between oil pump and the rotation vertical shaft;
Fig. 6 is diagram of the present invention; It at length is the oil tanker exterior feature in the interference region between oil pump and the rotation vertical shaft;
Fig. 7 is the section that the associated region between oil pump and the rotation vertical shaft at length is shown.
Embodiment
Fig. 1 shows the hermetic compressor of prior art, and it comprises the enclosed construction 1 that has for the storage tank of lubricant oil 2.This compressor also comprises the chunk 3 that is associated with bearing 4, and bearing 4 provides mechanical support for the rotor 6 of rotation vertical shaft 5 and electric notor 7, and electric notor 7 is responsible for the rotation of system, is fixed to chunk 3, and electric notor 7 also comprises stator 8.
Rotation vertical shaft 5 has oil pump 9 at its lower surface, and the lower end is immersed in the lubricant oil 2, and oil pump 9 also comprises sucker 9a.During the rotation of rotation vertical shaft 5 and oil pump 9, lubricant oil 2 forms parabola, and by the centrifugal supermedial dispensing orifice 5a that is positioned at rotation vertical shaft 5 that is increased to, the storage tank that dispensing orifice 5a leaves for lubricant oil 2 lubricant oil 2 is assigned to regions of lubrication, and regions of lubrication comprises the parts with relevant movement.
Therefore, pumping efficiency is the function of the larger-diameter relation that represents of the diameter of the section of the rotation vertical shaft 5 that is positioned at of the small diameter that limits of the sucker 9a by oil pump 9 and dispensing orifice 5a, and these values are more approaching, and lubricating efficiency is lower.This efficient also depends on the level (face) of lubricant oil 2 and the distance between the oily supply orifice 5a.
Fig. 2 shows with the present invention has more heterogeneous compressor like part, and it is included in mach internal channel 11 on the internal surface that rotates vertical shaft 5.Therefore, the internal diameter of the rotation vertical shaft 5 on the section of dispensing orifice 5a increases.The diagram of this increase is provided by Fig. 3, and Fig. 3 shows by increasing internal channel 11 increases diameter.Therefore, this structure comprises that the efficient of the pumping of the lubricant oil 2 that is represented by parabolical increase improves, as previously explained.
Fig. 4 shows preferred feature of the present invention, and it has better oily flow rate by concrete change.The rotation vertical shaft 5 of this figure comprises inner 14 and outside 15.Be important to note that, the preferred orientations of rotation vertical shaft 5 is vertical with respect to ground.One of these changes are to add slope hole 12 in the inside 14 of rotation vertical shaft 5, preferably tilt with respect to the scope of the center line that rotates vertical shaft 5 at 2.4 ° to 2.7 °.This inclination is so that the radial distance between the center line of the outer wall 16 of slope hole 12 and rotation vertical shaft 5 increases gradually, and therefore, there is larger value in the thickness of lubricant oil profile 2.
Similarly, the better distribution that is used for carrying out this slope hole and causes lubricant oil 2 for the restriction of the quota of carrying out dispensing orifice 5a and tolerance limit.In a preferred embodiment of the invention, rotation vertical shaft 5 also comprises except pore 5b, preferably is arranged in dispensing orifice 5a below, as by shown in Figure 4.Should be preferably located in the special position that the axial clearance between rotor 6 and the chunk 3 limits except pore 5b.
This change also attempts to reduce the restriction to lubricant oil profile 2, and in not on the same group the present invention with concentric hole, lubricant oil 2 is limited in rotating in the part of wall 16 of vertical shaft 5, (see also h as shown in FIG. 5, h ' and h "); Fig. 5 at length shows the lubricant oil profile 2 in oil pump and the interference region of rotation between the vertical shaft; and because the inclination of slope hole 12; so preferable configuration of the present invention does not have this restriction; as (see also h ' and h ") is shown by Fig. 6, and Fig. 6 at length shows the lubricant oil profile 2 in the interference region between oil pump and rotation vertical shaft 5.Therefore, can also little by little reduce to rotate the thickness of the wall 16 of vertical shaft 5, thereby so that the wall 16 of little thickness only be arranged in the zone that is used for transmitting lubricant oil 2.At this moment, the thickness of wall 16 between 0.89mm and 1.44mm, preferably reaches 1mm usually, yet depends on changeably the used material of manufacturing axle, and in this preferred embodiment, this material is molten iron, thereby attempts to increase in this zone the thickness of lubricant oil 2.
Therefore, the tolerance limit of the inclination of slope hole 12, slope hole 12 are determined by the thickness of wall 16 with respect to the tolerance limit of the position of the axial centre of rotation vertical shaft 5 and the diameter of slope hole 12, the thickness of wall 16 needs minimum value, such as what determined for the integrity that keeps rotating vertical shaft 5.Consider the bottom of slope hole 12, according to the present invention, its with respect to the large solid offsetting 2.0mm to 2.2mm for example in the center of the axial centre of rotation vertical shaft 5.
Be important to note that, the structure of slope hole allows the hardness of rotation vertical shaft 5 larger, and in the prior art, and the thickness of wall 16 is always constant and have a little width, so that 5 distortion of rotation vertical shaft, this can cause breaking of imbalance, rotation vertical shaft 5 or even mobile failure.In structure of the present invention, this axle has larger thickness at wall 16, and the thickness of wall 16 reduce be gradually; Therefore, near the little width of appearance dispensing orifice 5a only.
In addition, another modification is the change for the position of fixing the oil pump 9 that limits by confinement groove 13.This change allows to be reduced in the restriction aspect the inwall of oil pump, and as shown in FIG. 5 (h '), and the preferred embodiments of the present invention are provided by Fig. 6 (h ').Fig. 7 shows at final oil pump 9 before adaptive, wherein, be positioned at as the confinement groove 13 of inserting guide on the inside of rotation vertical shaft 5, preferably apart from the At The Height of its lower end 11.5mm, and necessarily guarantee for the parabolical minimum length that lubricant oil 2 is directed to dispensing orifice 5a, guaranteed that also pump will not be released.Similarly, importantly emphasize: if provided heteroid pump and axle, then can produce confinement groove in the outside of rotation vertical shaft 5.The thickness (in the wall of endoporus and the distance between the parabolic outlines) that this change is due to the fact that the lubricant oil 2 of pumping reduces according to the increase with respect to the distance of the pasta in the storage tank, therefore, if the inwall of oil scavenge pump is fixed to axle by long interference, then it can produce restriction to the profile that increases.
In addition, the 3rd changes the reducing of diameter of the sucker 9a be oil pump 9, preferably be decreased to 3mm, thereby finally cause oily flow rate when low rotation, to increase, therefore solved one of problem of mentioning in the prior art, in the prior art, lubricant oil 2 does not have enough power arrival dispensing orifice 5a when low rotation usually.On the other hand, this embodiment has limited the flow rate when height rotates, and the outer loop of the lubricant oil 2 (at the lubricant oil 2 of the outside pumping of compressor) in the cooling system is reduced, thereby has reduced cost and maintenance, as by shown in the following table.
| 1800rpm | 1900rpm | 2000rpm | 2400rpm | 3000rpm | 3600rpm | 4500rpm | |
| 10mm | -100 | -19.9598 | -3.96679 | 24.01522 | 61.38777 | 119.1043 | 139.6127 |
| 15mm | -100 | -11.4263 | -6.15982 | 7.965448 | 29.29844 | 81.13462 | 136.3346 |
| 20mm | -10.4927 | -3.46478 | 5.101657 | 8.769834 | 20.71828 | 53.27824 | 111.1336 |
Value on the table demonstrates: under the different immersion depth in lubricant oil and the different rotational speeies take have diameter as the oil pump 9 of the sucker 9a of 3mm as reference, have diameter and be the percentage of the flow rate variation take the millimeter per second as unit of oil pump 9 of the sucker 9a of 4.36mm.These values are according to formula
And change, therefore, negative variation shows, and with respect to the pump of 4.36mm, it is high that the flow rate value of the sucker of 3mm is wanted, and-100 flow rate shows the embodiment that when the sucker 9a of pump has the size of 4.36nrn lubricant oil 2 is not sent to dispensing orifice 5a.Row (10,15,20) is relevant with the immersion depth (unit be mm) of oil pump 9 in lubricant oil 2, and it is relevant with the rotational speed (unit is rpm) of rotation vertical shaft 5 to be listed as (1800 to 4500).
It is worthy of note, the restriction of parabolic outlines that these changes cause the horizontal plane from lubricant oil 2 being pumped into the lubricant oil 2 of the part that is positioned with inclination dispensing orifice 5b reduces, and described hole makes lubricant oil 2 be assigned to movable part away from the storage tank of lubricant oil 2.
After the example of having described preferred embodiment, should be understood that, scope of the present invention comprises the change that other is possible, it is only limited by the content of the claims that comprise possible equivalent.
Claims (29)
1. the oil pump that is used for hermetic compressor send system, and described hermetic compressor comprises at least:
The storage tank that is used for lubricant oil (2);
Rotation vertical shaft (5), described rotation vertical shaft (5) comprise inside (14) and outside (15);
The oil pump (9) that is associated with described rotation vertical shaft (5), described pump are included in the sucker (9a) of lower end, and described oil pump (9) is immersed in the described storage tank for lubricant oil (2);
Described compressor also have can be lubricated the zone;
Described hermetic compressor is characterised in that,
Described rotation vertical shaft (5) is included in the slope hole (12) on its inside (14), described slope hole (12) lubricant oil (2) can be assigned to can be lubricated the zone, and have inclination with respect to the center line of described rotation vertical shaft (5).
2. the oil pump for hermetic compressor according to claim 1 send system, it is characterized in that, the axial axis of described slope hole (12) has the inclination of acute angle with respect to the described center line of described rotation vertical shaft (5).
3. the oil pump for hermetic compressor according to claim 2 send system, it is characterized in that, the described axial axis of described slope hole (12) has at the angle of inclination in 2.4 ° to 2.7 ° scope with respect to the described center line of described rotation vertical shaft (5).
4. the oil pump for hermetic compressor according to claim 2 send system, it is characterized in that, described slope hole (12) has its axial centre with respect to the large solid offsetting of described center line of described rotation vertical shaft (5).
5. the oil pump for hermetic compressor according to claim 1 send system, it is characterized in that, described rotation vertical shaft (5) is included in the confinement groove (13) with oil pump (9) combination of being used on its inside (14).
6. the oil pump for hermetic compressor according to claim 5 send system, it is characterized in that, described confinement groove (13) is positioned at the about 11.5mm in top, lower end of described rotation vertical shaft (5).
7. the oil pump for hermetic compressor according to claim 1 send system, it is characterized in that, the described sucker (9a) of described oil pump (9) has about 3mm.
8. the oil pump for hermetic compressor according to claim 1 send system, it is characterized in that, described oil pump (9) can drive the enough lubricated zones of Danone with lubricant oil (2) eccentrically by described slope hole (12).
9. the oil pump for hermetic compressor according to claim 8 send system, it is characterized in that, described rotation vertical shaft (5) has for the dispensing orifice (5a) that lubricant oil (2) is assigned to zone that can be lubricated in the upper end of the suction pipe (12) that tilts.
10. the oil pump for hermetic compressor according to claim 9 send system, it is characterized in that, described dispensing orifice (5a) is formed for the passage of joining to the oil content of described outside (15) from the inside (14) of described rotation vertical shaft (5).
11. the oil pump for hermetic compressor according to claim 10 send system, it is characterized in that, described rotation vertical shaft (5) has except pore (5b).
12. the oil pump for hermetic compressor according to claim 11 send system, it is characterized in that, describedly be positioned on the upper end of described slope hole (12) except pore (5b), and with respect to slope hole (12) in described dispensing orifice (5a) below.
13. the oil pump for hermetic compressor according to claim 11 send system, it is characterized in that, described except pore (5b) vertically opposite with respect to described axial axis and the described dispensing orifice (5a) of described rotation vertical shaft (5).
14. the oil pump for hermetic compressor according to claim 11 send system, it is characterized in that, except the zone of described slope hole (12), with the zone of the zone of described oil pump (9) combination and described dispensing orifice (5a), described rotation vertical shaft (5) is solid in the section (14) within it.
15. the oil pump for hermetic compressor according to claim 10 send system, it is characterized in that, except the zone of described slope hole (12), with the zone of the zone of described oil pump (9) combination, described dispensing orifice (5a) and described except the zone of pore (5b), described rotation vertical shaft (5) is solid in the section (14) within it.
16. the oil pump that is used for hermetic compressor send the rotation vertical shaft (5) of system, described axle is characterised in that, it is included in the slope hole (12) in its inside (14), and the suction pipe of inclination (12) has inclination with respect to the center line of described rotation vertical shaft (5).
17. the oil pump for hermetic compressor according to claim 16 send the rotation vertical shaft (5) of system, it is characterized in that, the axial axis of described slope hole (12) has the inclination of acute angle with respect to the center line of the axial axis of described rotation vertical shaft (5).
18. the oil pump for hermetic compressor according to claim 17 send the rotation vertical shaft (5) of system, it is characterized in that, the described axial axis of described slope hole (12) has at the angle of inclination in 2.4 ° to 2.7 ° scope with respect to the described center line of described rotation vertical shaft (5).
19. the oil pump for hermetic compressor according to claim 18 send the rotation vertical shaft (5) of system, it is characterized in that, described slope hole (12) has it from the axial centre of the large solid offsetting of described axial centre of described rotation vertical shaft (5).
20. the oil pump for hermetic compressor according to claim 19 send the rotation vertical shaft (5) of system, it is characterized in that, described rotation vertical shaft (5) is included in the confinement groove (13) with oil pump (9) combination of being used in its inside (14).
21. the oil pump for hermetic compressor according to claim 20 send the rotation vertical shaft (5) of system, it is characterized in that, described confinement groove (13) is positioned at the about 11.5mm in top, lower end of described rotation vertical shaft (5).
22. the oil pump for hermetic compressor according to claim 21 send the rotation vertical shaft (5) of system, it is characterized in that, described rotation vertical shaft (5) has in the upper end of described slope hole (12) for the dispensing orifice (5a) that lubricant oil (2) is assigned to zone that can be lubricated.
23. the oil pump for hermetic compressor according to claim 22 send the rotation vertical shaft (5) of system, it is characterized in that, described dispensing orifice (5a) is formed for oil is assigned to from the inside (14) of described rotation vertical shaft (5) passage of described outside (15).
24. the oil pump for hermetic compressor according to claim 23 send the rotation vertical shaft (5) of system, it is characterized in that, described rotation vertical shaft (5) has except pore (5b).
25. the oil pump for hermetic compressor according to claim 24 send the rotation vertical shaft (5) of system, it is characterized in that, describedly be positioned on the upper end of described slope hole (12) except pore (5b), and with respect to slope hole (12) in described dispensing orifice (5a) below.
26. the oil pump for hermetic compressor according to claim 25 send the rotation vertical shaft (5) of system, it is characterized in that, described except described center line and described dispensing orifice (5a) the vertically opposite setting of pore (5b) with respect to described rotation vertical shaft (5).
27. the oil pump for hermetic compressor according to claim 22 send the rotation vertical shaft (5) of system, it is characterized in that, except the zone of described slope hole (12), with the zone of the zone of described oil pump (9) combination and described dispensing orifice (5a), described rotation vertical shaft (5) is solid in the section (14) within it.
28. the oil pump for hermetic compressor according to claim 24 send the rotation vertical shaft (5) of system, it is characterized in that, except the zone of described slope hole (12), with the zone of the zone of described oil pump (9) combination, described dispensing orifice (5a) and described except the zone of pore (5b), described rotation vertical shaft (5) is solid in the section (14) within it.
29. hermetic compressor is characterized in that, it comprises such as the oil pump that limits in claim 1 to 14 send system or as the rotation vertical shaft (5) that limits in claim 15 to 26.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102306643A CN102900650A (en) | 2011-07-29 | 2011-07-29 | Oil pumping system, shaft for same and hermetic compressor comprising oil pumping system and/or shaft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102306643A CN102900650A (en) | 2011-07-29 | 2011-07-29 | Oil pumping system, shaft for same and hermetic compressor comprising oil pumping system and/or shaft |
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| CN102900650A true CN102900650A (en) | 2013-01-30 |
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| CN103982393A (en) * | 2014-06-06 | 2014-08-13 | 王仪靖 | Perpendicular gravity pusher-type large-capacity liquid efficient pumping device |
| CN106438288A (en) * | 2016-10-17 | 2017-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and centrifugal pump structure thereof |
| CN106438288B (en) * | 2016-10-17 | 2018-10-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and its centrifugal pump structure |
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