CN103541883A - Oil pump of closed type piston compressor and compressor - Google Patents
Oil pump of closed type piston compressor and compressor Download PDFInfo
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- CN103541883A CN103541883A CN201210246465.6A CN201210246465A CN103541883A CN 103541883 A CN103541883 A CN 103541883A CN 201210246465 A CN201210246465 A CN 201210246465A CN 103541883 A CN103541883 A CN 103541883A
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Abstract
The invention discloses an oil pump of a closed type piston compressor. The oil pump comprises a pump sleeve and a pump core. The periphery of the pump core is sleeved with the pump sleeve, the pump sleeve and the pump core are concentric, the pump core is connected with a motor rotor or a crankshaft, and external threads are arranged on the outer wall of the pump sleeve. One or multiple spiral grooves are formed in the outer wall of the pump core. The invention further relates to the compressor. At least one spiral groove is designed in the outer wall of the pump core, one end of the pump core is fixed to the lower end of the rotor, and the other end of the pump core is immersed into an oil pool. The periphery of the pump core is sleeved with the round pipe fitting pump sleeve, and the pump sleeve is fixed to a motor stator through a supporting frame. The pump sleeve and the pump core are concentric. A certain gap is formed between the pump sleeve and the pump core, and a thread structure is arranged at the upper end of the outer wall of the pump sleeve. When oil is pumped at low frequency, the threads on the outer wall of the pump sleeve can effectively prevent the oil between the pump core and the pump sleeve from leaking. When the oil is pumped at high frequency, multiple through holes in the bottom of the pump sleeve can change the flow and flow direction of the oil, so that the problem of the overlarge quantity of the pumped oil is avoided.
Description
Technical field
The present invention relates to Compressor Technology field, particularly relate to a kind of oil pump and compressor of sealed mode piston compressor.
Background technique
Sealed mode piston compressor is the core component of the chiller plants such as air conditioner, refrigerator and refrigerator, it does work by the piston in compressor, order about coolant media circulation in compressor, reach the effect of refrigeration, and piston compressor adopts centrifugal pump to supply oil lubrication more.
The lubricating fitting centrifugal oil pumps that adopt as shown in Figure 1 of sealed mode piston compressor in the market more, compressor bottom forms an oil sump by housing, compressor movement bottom is provided with a centrifugal oil pump, be connected to rotor or bent axle lower end, and keep with one heart, when compressor operating, driven by motor oil pump is extracted into oil to need lubricated position, to meet the long-term efficient operation of compressor.
Centrifugal oil pump structure as shown in Figures 2 and 3, one thin-walled type pipe, aperture, upper end is large, aperture, lower end is little, the middle oil guide piece that inserts a slice spirality or straight shape, be called centrifugal pump, this structure pump oil principle is that liquid rises along wall under centrifugal action, the centrifugal pump of the type can meet the use of fixed frequency air conditioner machine under 50Hz condition, although can be by reducing entrance hole diameter r0, or increase the pumping ability that the methods such as bent axle and oil pump radius r 1 are improved this centrifugal pump, but the change of its pumping ability or limited, and easily there is the at a high speed lower excessive problem of fuel feeding.
Along with the application popularization of frequency conversion equipment, just make piston compressor operational speed range broaden, it is 1200rpm that frequency is low to moderate the corresponding rotating speed of 20Hz(), when low-frequency operation, the height of centrifugal pump pump oil significantly declines, and the mechanical lubrication problem in compressor highlights, and causes compressor to work, if pump oil is too many, waste energy, oil sump liquid level is low, and injecting oil mass increases, therefore in frequency converting air conditioner, compressor pump oil is a more crucial problem.
The desired speed of above-mentioned centrifugal pump is generally at 2500～3000rpm, almost cannot pump oil under low speed 1200rpm condition, 4500 turning that pump oil mass is excessive at a high speed.
Given this, some manufacturers improve centrifugal oil pump, the compressor oil pump of design adopts volute pump structure, wherein there is a pump core, its periphery design has spiral chute, one end is connected to bent axle lower end, one end is immersed in oil sump, its outer race has a circular pipe fitting, by an arm part, be fixed on motor stator, circular pipe fitting with the maintenance of volute pump core coaxial and between have certain interval, when bent axle rotates under driven by motor, pump core is also followed rotation, under spiral chute ramp effect, make oil increase, and peripheral circular pipe fitting feeding body provides a frictional force that liquid in rotation speed is slowed down, to improve pump oil mass.But between circular pipe fitting and rotor inner hole wall, there is gap, easily reveal.Although low frequency energy fuel feeding, exists and reveals between outer pipe and rotor inner wall, and have pump oil mass problems of too under high-speed condition.
Also have its spiral chute is arranged on cylindrical pipe fitting, cylindrical pipe fitting is fixed on rotor, and pump core is wall pipe part always, and it inserts band spiral fluted cylindrical pipe fitting center, and bottom on motor stator, makes it not follow outer tube member rotation by a fixation with steel wire.Motor rotation, drives the rotation of cylindrical pipe fitting, by spiral chute, will on oil pump, need lubricant housings.Although this scheme does not exist leakage, under the non-rotary condition of pump core, provide favourable frictional force little, but under high-speed condition, have pump oil mass problems of too.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of oil pump of closed-type compressor reasonable in design, simple in structure, the present invention realizes the technological scheme that above-mentioned purpose adopts and is:
An oil pump for closed-type compressor, comprises pump block and pump core, and described pump block is set in the periphery of described pump core, and described pump block and described pump core are concentric, and described pump core connects rotor or bent axle, on the outer wall of described pump block, is provided with outside thread;
On the outer wall of described pump core, be provided with one or more spiral groove.
More preferably, described outside thread is V thread screw, square threaded form, trapezoidal thread or buttress thread form.
More preferably, the bottom of described pump block is provided with protruding ear shape flange, on described ear shape flange, is provided with flange through hole.
More preferably, described flange through hole is arranged on the side of described ear shape flange.
More preferably, described pump block is without diapire;
Described ear shape flange and described pump block are one-body molded, and described ear shape flange and described pump block jointing place are provided with arc transition.
More preferably, the bottom of described pump block is radially provided with diapire, is provided with a plurality of through holes on described diapire.
More preferably, described through hole is shaped as circle, arc, triangle, ellipse or star.
More preferably, also comprise arc supporting frame, described arc supporting frame coordinates with the through hole on described ear shape flange, for fixing described ear shape flange.
More preferably, on the outer wall at the middle part of described pump block, be provided with the lug boss of the axis symmetry of two relatively described pump blocks.
More preferably, also comprise fixed block, described fixed block is used for fixing two described lug bosses, stops described pump block rotation.
More preferably, the cross section of described groove is rectangle or arc.
More preferably, the outer wall of described pump core is provided with circular groove, and described circular groove is for matching with described pump block.
The present invention also provides a kind of sealed mode piston compressor, comprises housing, bent axle, connecting rod, piston and motor, also comprises the oil pump of above-mentioned arbitrary technical characteristics.
More preferably, described arc supporting frame is installed on the stator of described motor.
More preferably, described fixed block is installed on the stator of described motor.
The invention has the beneficial effects as follows: pump core adopts volute pump structure, pump outer core is designed with at least one spiral groove, one end is fixed on rotor lower end, in one end floodlubrication oil sump, its outer race has the pump block of sleeve-shaped, pump block is fixed on motor stator by supporting frame or fixed block, pump block keeps concentric and has certain interval between the two with pump core, pump block outer wall upper end is provided with outside thread, when bent axle rotates under driven by motor, pump core is also followed rotation, makes oil increase under spiral groove ramp effect; When low frequency pump oil, the outside thread on pump block wall can effectively prevent the oil leak between pump core and pump block; When high frequency pump oil, the numerous through holes in pump block bottom can change flow and the flow direction of lubricant oil, and then avoid the excessive problem of pump oil mass.
Accompanying drawing explanation
Fig. 1 is that the centrifugal oil pump of prior art assembles the schematic diagram after compressor;
Fig. 2 is the centrifugal oil pump sectional view of prior art;
Fig. 3 is that the centrifugal oil pump shown in Fig. 2 coordinates schematic diagram with rotor;
Fig. 4 is oil pump one embodiment's of the sealed mode piston compressor of the present invention assembling of the pump block with bottom support frame schematic diagram;
Fig. 5 is the pump core sectional view shown in Fig. 4;
Fig. 6 is the pump core schematic perspective view described in Fig. 5;
Fig. 7 is the pump block sectional view shown in Fig. 4;
Fig. 8 is the pump block schematic perspective view shown in Fig. 7;
Fig. 9 is the pump block worm's eye view shown in Fig. 7;
Figure 10 is that the pump block shown in Fig. 7 coordinates sectional view with the pump core shown in Fig. 5;
Figure 11 is the pump block stereogram without diapire;
Figure 12 is the pump block worm's eye view shown in Figure 11;
Figure 13 is oil pump one embodiment's of the sealed mode piston compressor of the present invention assembling of the pump block with lug boss schematic diagram;
Figure 14 is the pump block sectional view shown in Figure 13;
Figure 15 is the pump block worm's eye view shown in Figure 14;
Figure 16 is the pump block schematic perspective view shown in Figure 14;
Wherein,
1 pump core; 11 grooves; 12 circular grooves; 2 pump blocks; 21 outside threads; 22 through holes;
23 ear shape flanges; 24 flange through holes; 25 lug bosses; 3 supporting frames; 4 rotors; 5 stators;
6 housings; 7 bent axles; 8 cylinder end pieces; 9 fixing frames.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the Air-tight piston formula refrigeration compressor of take is example, and the oil pump of closed-type compressor of the present invention and compressor are further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, does not limit the oil pump of closed-type compressor of the present invention for refrigeration compressor.
Air-tight piston formula compressor comprises housing, bent axle, connecting rod, piston, motor and oil pump.
With reference to Fig. 4 to Figure 10, the oil pump of closed-type compressor comprises pump core 1 and pump block 2, pump core 1 and pump block 2 are sleeve-shaped, the inwall of pump core 1 is cylindrical, the internal diameter that cuts part on pump core 1 is greater than the internal diameter of its lower section part, on pump core 1, cut part and be provided with a cirque body with the intersection of its lower section part, the outer circumferential side that cuts part on the inner circumferential side of toric upper end portion and pump core 1 is tightly connected, preferably, on cirque body and pump core 1, cutting part is an integral body, between lower section of part of described cirque body inwall and pump core 1, form a circular groove 12, be positioned at the outer wall place of pump core 1, on the outer wall of lower section of part of pump core 1, be provided with one or more spiral groove 11, the cross section of groove 11 is rectangle or arc.
The inwall of pump block 2 is cylindrical, its outer wall was also cylindrical before machining screw 21, on the outer wall of the upper end portion of pump block 2, be provided with outside thread 21, outside thread 21 is V thread screw, square threaded form, trapezoidal thread or buttress thread form, the length in outside thread 21 regions is set identical or approaching with the degree of depth of circular groove 12 on pump core 1 on pump block 2.
After oil pump assembling, pump core 1 is connected and fixed on rotor 4 or bent axle 7, keep coaxial with rotor 4 or bent axle 7, pump block 2 is surrounded on outside pump core 1, and concentric with pump core 1, outside thread 21 inserts in the circular groove 12 of pump core 1, between the spiral part of pump core 1 and the inwall of pump block 2, has certain interval, between the outer wall of pump block 2 and the inwall of circular groove 12, also have certain interval, the lower end of pump core 1 and pump block 2 is immersed respectively in the lubricating oil bath of being determined by housing 6 simultaneously.
During rotor 4 rotation, pump core 1 is followed rotor 4 rotations, and lubricant oil rises to the place that rotor and bent axle need to lubricate under the effect on groove 11 inclined-planes of screw type.
The diapire of pump block 2 is provided with many through holes, and in the time of can limiting high frequency, the too much problem of pump oil, can control the flow direction that enters oil in oil pump simultaneously, is conducive to pump oil; Owing to having certain interval between the outer wall of pump block 2 and the inwall of circular groove 12, so when the rotation of pump core is risen oil, partly oily can leakage between this gap, so pump block 2 upper ends is designed with worm structure, and when 1 rotation of pump core, this screw thread will reduce oily leakage.
More preferably, as a kind of embodiment, as shown in Figure 11 and Figure 12, pump block 2 bottoms have continual circular crosssection, and without diapire, bottom is open-minded, there is no multi-through hole structure;
For making to be connected firmly between ear shape flange 23 and pump block 2 and smoothly smooth and easy, ear shape flange 23 is one-body molded with pump block 2, and ear shape flange 23 is provided with arc transition with pump block 2 jointing places.
More preferably, as another kind of embodiment, be with the difference of above-described embodiment: the lug boss that is provided with two relative described pump block 2 center line symmetries on the outer wall at the middle part of pump block 2.The supporting way of pump block 2 no longer adopts the supporting frame of arc, but adopts fixed block at the middle part of pump block 2, and the bottom of pump block 2 is also without ear shape flange is set.
As shown in Figure 13 to Figure 16, on the outer wall at the middle part of pump block 2, be provided with the lug boss 25 of two relatively described pump block axis symmetries, lug boss 25 coordinates with fixed block 9, fixed block 9 is installed on stator 5, be used for supporting pump block 2, stop pump block 2 with pump core 1 synchronous rotary, but the fixing position of pump block 2 not allow pump block 2 activity among a small circle in simultaneously.The diapire of pump block 2 can be provided with a plurality of equally distributed through holes 22, or pump block 2 bottoms are without diapire, there is no multi-through hole structure.
Pump block bottom earless shape flange, that oil pump can be designed is longer, thereby reduces oil filling amount, reaches the object reducing costs.
The above embodiment has only expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (15)
1. an oil pump for closed-type compressor, comprises pump block and pump core, and described pump block is set in the periphery of described pump core, and described pump block and described pump core are concentric, and described pump core connects rotor or bent axle, it is characterized in that:
On the outer wall of described pump block, be provided with outside thread;
On the outer wall of described pump core, be provided with one or more spiral groove.
2. the oil pump of closed-type compressor according to claim 1, is characterized in that:
Described outside thread is V thread screw, square threaded form, trapezoidal thread or buttress thread form.
3. the oil pump of closed-type compressor according to claim 1, is characterized in that:
The bottom of described pump block is provided with protruding ear shape flange, on described ear shape flange, is provided with flange through hole.
4. the oil pump of closed-type compressor according to claim 3, is characterized in that:
Described flange through hole is arranged on the side of described ear shape flange.
5. the oil pump of closed-type compressor according to claim 3, is characterized in that:
Described pump block is without diapire;
Described ear shape flange and described pump block are one-body molded, and described ear shape flange and described pump block jointing place are provided with arc transition.
6. the oil pump of closed-type compressor according to claim 3, is characterized in that:
The bottom of described pump block is radially provided with diapire, is provided with a plurality of through holes on described diapire.
7. the oil pump of closed-type compressor according to claim 6, is characterized in that:
Described through hole be shaped as circle, arc, triangle, ellipse or star.
8. according to the oil pump of the closed-type compressor described in claim 3 to 7 any one, it is characterized in that:
Also comprise arc supporting frame, described arc supporting frame coordinates with the through hole on described ear shape flange, for fixing described ear shape flange.
9. the oil pump of closed-type compressor according to claim 1 and 2, is characterized in that:
On the outer wall at the middle part of described pump block, be provided with the lug boss of the axis symmetry of two relatively described pump blocks.
10. the oil pump of closed-type compressor according to claim 9, is characterized in that:
Also comprise fixed block, described fixed block is used for fixing two described lug bosses, stops described pump block rotation.
The oil pump of 11. closed-type compressors according to claim 1 and 2, is characterized in that:
The cross section of described groove is rectangle or arc.
The oil pump of 12. closed-type compressors according to claim 1 and 2, is characterized in that:
The outer wall of described pump core is provided with circular groove, and described circular groove is for matching with described pump block.
13. 1 kinds of sealed mode piston compressors, comprise housing, bent axle, connecting rod, piston and motor, it is characterized in that:
Also comprise the oil pump described in claim 1 to 12 any one.
14. sealed mode piston compressors according to claim 13, is characterized in that:
Described arc supporting frame is installed on the stator of described motor.
15. sealed mode piston compressors according to claim 13, is characterized in that:
Described fixed block is installed on the stator of described motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210246465.6A CN103541883B (en) | 2012-07-17 | 2012-07-17 | Oil pump of closed type piston compressor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210246465.6A CN103541883B (en) | 2012-07-17 | 2012-07-17 | Oil pump of closed type piston compressor and compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103541883A true CN103541883A (en) | 2014-01-29 |
| CN103541883B CN103541883B (en) | 2016-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210246465.6A Active CN103541883B (en) | 2012-07-17 | 2012-07-17 | Oil pump of closed type piston compressor and compressor |
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| CN (1) | CN103541883B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089646A (en) * | 2016-08-09 | 2016-11-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Control oil structure and frequency conversion piston compressor |
| CN106401915A (en) * | 2016-09-22 | 2017-02-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Oil pumping system for crankshaft and compressor with same |
| CN106870328A (en) * | 2017-03-30 | 2017-06-20 | 浙江迪贝电气股份有限公司 | The inverter compressor motor spiral oil pumping device fixed holding structure of oil suction core pipe |
| CN109322813A (en) * | 2018-12-11 | 2019-02-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigerating plant with it |
| CN114856972A (en) * | 2022-06-01 | 2022-08-05 | 珠海格力电器股份有限公司 | A kind of compressor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107725307B (en) * | 2017-10-11 | 2019-04-26 | 黄石东贝电器股份有限公司 | Oil pump structure and compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106089646A (en) * | 2016-08-09 | 2016-11-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Control oil structure and frequency conversion piston compressor |
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| CN106401915A (en) * | 2016-09-22 | 2017-02-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Oil pumping system for crankshaft and compressor with same |
| CN106870328A (en) * | 2017-03-30 | 2017-06-20 | 浙江迪贝电气股份有限公司 | The inverter compressor motor spiral oil pumping device fixed holding structure of oil suction core pipe |
| CN109322813A (en) * | 2018-12-11 | 2019-02-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigerating plant with it |
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| CN114856972A (en) * | 2022-06-01 | 2022-08-05 | 珠海格力电器股份有限公司 | A kind of compressor |
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