CN1704604A - Gear type compressor - Google Patents
Gear type compressor Download PDFInfo
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- CN1704604A CN1704604A CN 200410019350 CN200410019350A CN1704604A CN 1704604 A CN1704604 A CN 1704604A CN 200410019350 CN200410019350 CN 200410019350 CN 200410019350 A CN200410019350 A CN 200410019350A CN 1704604 A CN1704604 A CN 1704604A
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- gear
- gear type
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- rotating shaft
- refrigerant
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Abstract
This invention relates to a gear-type contractor, which comprises motor, gear-type compressing part below the motor, and gear-type swelling part; the dynamic will be sent to the compressing part and swelling part through the rotation shaft of the motor, forming oil-bath in the periphery of the motor, wherein the oil-bath is straight whose length direction is parallel to the axis of rotation shaft, and deepness direction is vertical to the axis; several oil-bathes are distributed distantly along the periphery direction of rotation shaft, and it can be also formed cochleiform around the periphery. Said invention can increase the coefficient of performance of refrigerating system, and can use carbon dioxide to replace traditional coolant, which is benefit for environmental protection; besides, it has small working bulk and compressing ratio.
Description
Technical field
The present invention relates to a kind of compressor.Particularly relate to a kind of by allowing the whole surface of the lubricated effectively rotating shaft of lubricant oil, thereby the gear type compressor of the mechanical wear when reducing the machine shaft rotation.
Background technique
Usually, compressor is the power that utilizes motor or steam turbine, to the pressurization of working fluids such as air, refrigerant, improves a kind of machine of working fluid pressure.This compressor is widely used in field of household appliances and production fields such as air-conditioning, refrigerator.
By compression type branch, compressor can be divided into displacement type compressor and turbo type compressor.
What wherein, be widely used in production field is displacement type compressor.The compress mode of displacement type compressor is the mode by minimizing volume boost pressure.Displacement type compressor can be divided into reciprocal compressor and rotary compressor.
Reciprocal compressor utilizes the to-and-fro motion compressed fluid of cylinder interior piston.The advantage of reciprocal compressor is to produce higher compression efficiency with less mechanical realization.But there is the limited problem of rotational speed in reciprocal compressor because of the to-and-fro motion of piston.Simultaneously, also because the inertia of piston produces bigger vibration.
Rotary compressor utilizes the revolution compression working fluid of the eccentric compressing roller of cylinder interior.Rotary compressor is compared with reciprocal compressor, can obtain higher compression efficiency with lower speed.And it is little that rotary compressor also possesses vibration, the advantage that noise is low.
Rotary compressor need discharge operations such as remaining air for variable flow under certain rotation speed, and for the pressure of dealing with when discharging surplus air increases, stabilizer need be set, therefore, and the structure more complicated.
In rotary compressor, highly consistent if the slit between each parts does not keep, be easy to generate the leakage of pressurized gas, cause decreased performance.When producing wearing and tearing, performance can sharply descend.Therefore, add and to guarantee very high precision man-hour.In addition, under rapid variation in pressure, be easy to generate the ruined phenomenon of bearing.
That is, rotary compressor has different performances and pluses and minuses separately with reciprocal compressor.
Refrigerating circuit is as the loop on a kind of thermodynamic definitions, and its purpose is to reduce by work done the temperature of low-temp. portion.The system that forms this refrigerating circuit is called refrigeration system.Refrigeration system is mainly used in refrigerator, devices such as air-conditioning.
As shown in Figure 1, refrigeration system is by compressor 30, condenser 50, and expansion valve 40, vaporizer 60 is formed.Compressor 30 is compressed into high-temperature high-pressure state to refrigerant.Outwards emitting heat in condenser 50 after, the refrigerant that flows out is condensed into liquid state from compressor 30.The heat insulation expansion of refrigerant that expansion valve 40 allows condenser 50 discharge sharply reduces the pressure of refrigerant.Flow through the refrigerant of expansion valve 40, in vaporizer 60, absorb heat from the outside and be evaporated into gaseous state.
Fig. 2 is that the refrigeration system P-h of Fig. 1 concerns schematic representation.Utilize circumferential work (Wc), compressor 30 compression refrigerants (1 → 2), and compressed refrigerant is outwards emitted heat (2 → 3) by condenser 50 in the compressor 30.
Flow through the refrigerant behind the condenser 50, when flowing through expansion gear 40,, absorb heat (4 → 1) when flowing through vaporizer 60 more afterwards from the outside by heat insulation expansion (3 → 4).The refrigerant that flows through vaporizer 60 flows in the compressor 30 again.
The coefficient of performance of refrigeration system (COP:coefficient of performance) is defined as, the heat (Q that low-temp. portion absorbs from vaporizer 60
H) merit (Wc) of ratio piston compressor.
In order to form refrigeration system efficiently, need when selecting suitable refrigerant, allow compressor have more effective structure.
Recently, ozonosphere is played destruction, so to using alternative refrigerants such as carbon dioxide to be come into one's own because find traditional freon.Therefore need to use when substituting refrigerant to guarantee that also refrigerant does not leak and have the compressor of the reliability on the mechanical structure.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of and has the coefficient of performance that improves refrigeration system, and allow lubricant oil be diffused in the whole surface of machine shaft effectively, the gear type compressor of the mechanical wear brought of preventing to rub.
The technical solution adopted in the present invention is: a kind of gear type compressor, include motor, also be provided with the gear type press part that the power that utilizes motor compresses the refrigerant that flows to from vaporizer in the bottom of motor, and flow out and flow through the gear type bulge that the refrigerant that flows into again behind the condenser expands from compressor, machine shaft passes the power of motor to gear type press part and gear type bulge, is formed with oil groove on the outer peripheral surface of motor.The oil groove that is formed on the machine shaft outer peripheral surface has rectilinear form.The length direction of oil groove and the parallel axes of rotating shaft are Vertical direction.Several oil grooves form across certain intervals mutually by the circumferencial direction of rotating shaft.
Oil groove also can be axial along rotating shaft, forms with respect to axis tilt, and its overall shape is spiral-shaped.The helical oil groove is at least around the outer peripheral surface of a secondary shaft.
The end of machine shaft is not exposed at the outside of gear type bulge and is advisable.
In sum, the present invention has improved the coefficient of performance of refrigeration system by the gear type compressor is provided.And, can provide the compressor that is beneficial to environmental protection by replacing traditional refrigerant with refrigerants such as carbon dioxide.As refrigerant, the spreadable life of carbon dioxide is long, does not have toxicity, and has the non-combustible feature.Its price is also very low, and resource is very abundant, does not have the necessity that reclaims.Carbon dioxide is dissolved in the lubricant oil easily, and per unit volume is 5 times of CFC series R-22 than refrigerating capacity.Therefore, when carrying out the refrigeration of same power, its working volume is very little, and compression ratio is also very little.
And in the gear type compressor provided by the invention, the power of internal gear and outer gear and torque ratio are balanced, vibration and noise in the time of therefore can reducing compressor operating.Lubricant oil can be diffused in each parts of press part and bulge and the surface of contact between the machine shaft, the mechanical wear that can reduce friction and bring effectively.
Description of drawings
Fig. 1 is the refrigeration system pie graph of prior art;
Fig. 2 is that the refrigeration system P-h of Fig. 1 concerns schematic representation;
Fig. 3 is a gear type compressor arrangement schematic representation provided by the invention;
Fig. 4 a is the I-I line schematic cross-sectional view of Fig. 3;
Fig. 4 b is the II-II line schematic cross-sectional view of Fig. 3;
Machine shaft front elevation among Fig. 5 Fig. 3;
Fig. 6 is after adopting compressor provided by the invention, the refrigeration system pie graph;
Fig. 7 is another example front elevation of machine shaft provided by the invention;
Fig. 8 is the schematic cross-sectional view of Fig. 7.
Wherein:
1: shell 100: suction pipe
110: power supply terminal 120: base plate
2: motor 200: stator
210: rotor 220: rotating shaft
221: oil groove 222: oil groove
3: gear type press part 300: main bearing
300a: suction port 310: compression cylinder
320: outer gear 320a: teeth groove
330: internal gear 330a: the gear teeth
340: compressed board 340a: exhaust port
350: the secondary suction pipe 360 of press part: press part discharge tube
4: gear type bulge 400: expansion oplate
410: expansion cylinder block 420: outer gear
420a: teeth groove 430: internal gear
430a: the gear teeth 440: supplementary bearing
440a: suction port 440b: exhaust port
450: bulge suction pipe 460: the bulge discharge tube
5: condenser 6: vaporizer
Embodiment
Below,, to Fig. 7 example provided by the invention is elaborated with reference to Fig. 3.
Fig. 3 is a gear type compressor arrangement schematic representation provided by the invention; Fig. 4 a is the I-I line schematic cross-sectional view of Fig. 3; Fig. 4 b is the II-II line schematic cross-sectional view of Fig. 3; Machine shaft front elevation among Fig. 5 Fig. 3; Fig. 6 is after adopting compressor provided by the invention, the refrigeration system pie graph; Fig. 7 is another example front elevation of machine shaft provided by the invention; Fig. 8 is the schematic cross-sectional view of Fig. 7.
Among the present invention, the gear type compressor comprises shell 1, motor 2, and gear type press part 3, gear type bulge 4 is formed.Shell 1 has certain inside space.Motor 2 is arranged on shell 1 inside.The power that gear type press part 3 utilizes motor 2 to provide, the refrigerant that vaporizer 6 is discharged compresses.Again flow into compressor inside after the refrigerant that press part 3 is discharged flows through condenser 5, expanded by gear type bulge 4.
Motor 2 is by the stator 200 that is arranged on shell 1 inwall, and rotor 210 compositions that are arranged on stator 200 center portions.After motor 2 was connected power supply by power supply terminal 110, rotor 210 was rotated.
Gear type press part 3 comprises main bearing 300, compression cylinder 310, and outer gear 320, internal gear 330, compressed board 340 is formed.Main bearing 300 is fixed on the motor below in the shell 1.Annular compression cylinder body 310 is connected with main bearing 300, is provided with thereunder.Outer gear 320 rotatably is arranged on the inner space of compression cylinder 310.Internal gear 330 is arranged on outer gear 320 inboards, receives power by machine shaft 220 from motor, and meshes with outer gear 320, is rotated compression refrigerant.Compressed board 340 is connected with compression cylinder 310, and is provided with thereunder.
Side at shell 1 is provided with suction pipe 100, is used for to the shell 1 inner refrigerant that sucks.
The bottom of shell 1 has base plate 120, is used to be provided with compressor.
On main bearing 300, be attached thereto the secondary suction pipe 350 of press part is set.The secondary suction pipe 350 of press part is used for the refrigerant that flows to shell 1 inside is sent to by compression cylinder 310 inner space of outer gear 320.On compressed board 340, discharge tube 360 is set.Discharge tube 360 is used for the refrigerant after the compression is sent to condenser 5.
The secondary suction pipe 350 of press part is exposed at the lubricant oil liquid level top of shell 1 inside.
That is, the lubricant oil of the upper and lower part of press part 3 is not separated from each other, but is interconnected by groove 3g.Groove 3g vertically is formed on the outer peripheral surface of compression cylinder 310 and main bearing 300 and compressed board 340.
Side at supplementary bearing 440 is provided with bulge suction pipe 450, is used for the refrigerant that flows through condenser 5 is drawn into expansion cylinder block 410 inboards.
At the opposite side of supplementary bearing 440, bulge discharge tube 460 is set, be used for the refrigerant after expanding is sent to vaporizer 6.
On main bearing 300, form suction port 300a.On compressed board 340, form exhaust port 340a.
On a certain special position of supplementary bearing 440, form suction port 440a and exhaust port 440b respectively.
On rotating shaft 220 outer peripheral surfaces of motor 2, form oil groove 221.The length direction of oil groove 221 is pressed several angle with respect to the axis of rotating shaft 220, thereby forms spiral-shaped on the outer peripheral surface of rotating shaft 220.
The end of the rotating shaft 220 of motor 2 is positioned within the base of gear type bulge 4.That is, the end of the rotating shaft 220 of motor 2 is not exposed at supplementary bearing 440 outsides of forming gear type bulge 4 and is advisable.
The boundary dimension of bulge 4 is littler than the boundary dimension of press part 3.
That is, the boundary dimension of supplementary bearing 440 and expansion cylinder block 410 and expansion oplate 400 is advisable for a short time than the boundary dimension of main bearing 300 and compression cylinder 310 and compressed board 340.Thereby, on the compressed board 340 of gear type press part 3, connect press part discharge tube 360 easily.
Can be designed to the reason littler than the boundary dimension of press part to the boundary dimension of gear type bulge 4 is that the gear size of bulge 4 is littler than the gear size of press part 3.
This be because, compare with the refrigerant that flows into bulge 4 by suction port 440a, the refrigerant that flows in the press part 3 by suction port 300a has littler density, the refrigerant volume when identical in quality in the press part is bigger.Thereby,, need allow the working volume of inflation process less than the working volume in the compression process in order to make the mass flow rate of inflation process and compression process identical.Therefore, the gear size of bulge 4 is littler than the gear size of press part 3.
But the difference between the gear size is directly not related with the boundary dimension difference between compression cylinder 310 and the expansion cylinder block 410.
Below, with reference to Fig. 3 to Fig. 6, compressor effect of the present invention is described.
To shown in Figure 6,, in gear type press part 3, carry out the compression of refrigerant as Fig. 3 along with the work of motor 2.Compressed refrigerant flows in the condenser 5 by path in press part 3, and when flowing through condenser 5, outwards emits heat.
Flow through the refrigerant behind the condenser 5, flow in the compressor bulge 4 by path.When flowing through bulge 4, refrigerant expands.
Flow through the refrigerant behind the bulge 4, flow in the vaporizer 6.When refrigerant flows through vaporizer 6, absorb heat from the outside.
After flowing through vaporizer 6, refrigerant flows in the press part 3 again.Carry out above-mentioned flow process repeatedly, form refrigerating circuit.
With reference to Fig. 3, in refrigerating circuit, the process to compressor provided by the invention compresses and expands refrigerant is elaborated.
At first, the motor that is installed in shell 1 inwall is connected power supply, allow produce electromagnetic action between stator 200 and the rotor 210, rotor 210 is rotated.At this moment, by being arranged on the suction pipe 100 of shell 1 upper end portion, flow to refrigerant to shell 1 inside.
Flow to the refrigerant of shell 1 inside,, flow to the inner space of outer gear 320 by being connected the secondary suction pipe 350 on the main bearing 300.
At this moment, flow through the refrigerant of the secondary suction pipe 350 of press part,, flow to the inner space of outer gear 320 by the main bearing 300 suction port 300a that are communicated with outer gear 320 inner spaces.
After flowing to the inner space of outer gear 320, refrigerant is gradually reduced under internal gear 330 turning efforts that combine with motor shaft 220, flow through the exhaust port 340a that is formed on the compressed board 340 afterwards, flow out, be sent to condenser 5 by the press part discharge tube 360 that is connected with exhaust port 340a.
The area of the exhaust port 340a of its press part 3 is littler than the area of suction port 300a.
In condenser 5, carry out the refrigerant after the heat exchange, flow to again in the compressor gear type bulge 4.
That is, carry out the refrigerant after the heat exchange in condenser 5, flow through the bulge suction pipe 450 that is connected supplementary bearing 440 1 sides, the suction port 440a by supplementary bearing 440 flows to outer gear 420 inner spaces.After refrigerant flows to outer gear 420 inner spaces, under internal gear 430 turning efforts that combine with motor shaft 220, expand gradually.Afterwards, be discharged from, flow through the discharge tube 460 that is connected exhaust port 440b, flow to vaporizer by the exhaust port 440b that is formed on supplementary bearing 440 opposite sides.
The exhaust port 440b area of bulge 4 is bigger than the area of suction port 440a.
Identical with the situation among the embodiment, gear type press part 3 and gear type bulge 4 preferably are arranged on same shell 1 inside, but also can be separately positioned in the different shells.
Motor 2 also can be arranged on shell 1 outside, can adopt any drive unit as long as can produce power.
In addition, Fig. 4 a is the I-I line schematic cross-sectional view of Fig. 3, shows the internal gear 330 of composition press part 3 and the form on the outer gear 320 geometry meanings.
The teeth groove 320a quantity of outer gear 320 is bigger than the quantity of the gear teeth 330a of internal gear 330.Be positioned at eccentric position with the combine rotating center of the internal gear 330 that is rotated of motor shaft 220, the rotating center of outer gear 320 also is positioned at eccentric position.
Usually, the number of the gear teeth 330a of internal gear 330 is lacked than the number of the teeth groove 320a of outer gear 320, and the gear teeth have slick and sly curved shape and are advisable.
Fig. 4 b is the II-II line schematic cross-sectional view of Fig. 3, shows the internal gear 430 of composition bulge 4 and the form on the outer gear 420 geometry meanings.The internal gear 430 of bulge 4 is identical with the outer gear structure with the internal gear of press part 3 with the structure of outer gear 420, just varies in size.
Compare with the compressor with other structures, the moment variations amount that produces during compressor compresses refrigerant provided by the invention is very little.
That is, compressor provided by the invention is compared with reciprocal compressor, and the moment variations amount is very little.
Gear type compressor provided by the invention is when compression and expansion refrigerant, and internal gear 330,430 and outer gear 320,420 are rotated together, the equilibrium on the holding torque, thus vibration and noise are lower.
In the gear type compressor provided by the invention, several gear teeth 330a, the 430a of internal gear 330,430 contacts with several teeth groove 320a, the 420a of outer gear 320,420, can prevent that the power that internal gear transmits to outer gear from concentrating on certain a bit.
In the gear type compressor provided by the invention, the speed difference between teeth groove 320a, the 420a of gear teeth 330a, the 430a of internal gear 330,430 and outer gear 320,420 on contact points is very little.
Gear type compressor provided by the invention can use carbon dioxide as refrigerant.
As refrigerant, the spreadable life of carbon dioxide is long, does not have toxicity, and has the non-combustible feature.Its price is also very low, and resource is very abundant, does not have the necessity that reclaims.Carbon dioxide is dissolved in the lubricant oil easily, and per unit volume is 5 times of CFC series R-22 than refrigerating capacity.Therefore, when carrying out the refrigeration of same power, its working volume is very little, and compression ratio is also very little.
Gear type compressor provided by the invention can allow advantage give full play to by adopting carbon dioxide.
In the gear type compressor that the present invention relates to, the outer peripheral surface of the rotating shaft 220 of motor 2, not only carry out relative movement, but also carry out relative movement with the bulge of forming by expansion oplate 400, expansion cylinder block 410, supplementary bearing 440 etc. 4 with the press part of forming by main bearing 300, compression cylinder 310, compressed board etc. 3.Reduced the mechanical wear of bringing because of the friction on each surface of contact.
Prior art is to utilize devices such as oil pump to provide lubricant oil to rotating shaft.But the setting of these methods and processing and structure be more complicated all, and it is also bigger to implement difficulty, so processing charges is quite high.
As shown in Figure 5, the present invention adopts the method that forms oil groove 221 on the outer peripheral surface of the rotating shaft 220 of motor 2, the centrifugal force that produces when utilizing rotating shaft 220 rotations and the viscosity of lubricant oil, allow the lubricant oil that leaves bottom in the shell 1 in along oil groove 221, flow to top from the bottom of rotating shaft 220, and be diffused in the whole surface of the outer peripheral surface of rotating shaft 2.Thereby, reduced the mechanical wear between rotating shaft 220 and press part 3 and the bulge 4 very simply.
The present invention forms simple helical oil groove 221 by the outer peripheral surface in the rotating shaft 220 of motor 2, allows lubricant oil be diffused on the whole outer peripheral surface of rotating shaft 220, has simplified the shape of rotating shaft 220, can reduce processing cost.
Fig. 7, Fig. 8 are another example front elevation of machine shaft provided by the invention.This figure demonstrates the oil groove in another embodiment of the present invention.Among this embodiment, the oil groove 222 that forms on rotating shaft 220 outer peripheral surfaces of motor 2 has rectilinear form.The parallel axes of the length direction of oil groove 222 and rotating shaft 220, the axis normal of its depth direction and rotating shaft 220 forms.Several oil grooves 222 form across certain intervals mutually by the circumferencial direction of rotating shaft 220.
In the present embodiment, though different with the last shape of oil groove of executing example, their action principle and effect and aforementioned same content or close.Therefore, detailed.
Among the present invention, the shape in the several examples that provide, oil groove 221,222 can also have other shapes.Only otherwise exceed technological thought scope of the present invention, can there be a lot of modifications.Therefore, other example no longer is described.
Claims (10)
1. gear type compressor, include motor (2), it is characterized in that, also be provided with the gear type press part (3) that the power that utilizes motor compresses the refrigerant that flows to from vaporizer (6) in the bottom of motor (2), and flow out and flow through the gear type bulge (4) that the refrigerant that flows into again behind the condenser (5) expands from compressor (2), the rotating shaft (220) of motor (2) passes the power of motor to gear type press part (3) and gear type bulge (4), is formed with oil groove on rotating shaft (220) outer peripheral surface of motor (2).
2. gear type compressor according to claim 1 is characterized in that, the oil groove on described rotating shaft (220) outer peripheral surface that is formed on motor (2) has rectilinear form.
3. gear type compressor according to claim 2 is characterized in that, described oil groove is the parallel axes of its length direction and rotating shaft (220), the oil groove (222) that the axis normal of its depth direction and rotating shaft (220) forms.
4. gear type compressor according to claim 3 is characterized in that, described several oil grooves (222) are separated with formation at interval mutually by the circumferencial direction of rotating shaft (220).
5. gear type compressor according to claim 2 is characterized in that, described oil groove be along rotating shaft (220) axially, and the oil groove (221) that forms with respect to the axis tilt of rotating shaft (220) of its length direction.
6. gear type compressor according to claim 5 is characterized in that, described oil groove (221) is formed on the outer peripheral surface of rotating shaft (220) by helical.
7. gear type compressor according to claim 6 is characterized in that, described helical oil groove (221) is at least around the outer peripheral surface of a secondary shaft (220).
8. gear type compressor according to claim 1 is characterized in that, the end of the rotating shaft (220) of described motor (2) is positioned within the base of gear type bulge (4).
9. gear type compressor according to claim 1, it is characterized in that, described gear type press part (3) comprises main bearing (300), compression cylinder (310), outer gear (320), internal gear (330), compressed board (340) is formed, and its main bearing (300) is fixed on the below of the interior motor of shell (1) (2); Annular compression cylinder body (310) is connected with main bearing (300), is provided with thereunder; Outer gear (320) rotatably is arranged on the inner space of compression cylinder (310); Internal gear (330) is arranged on the inboard of outer gear (320), from motor (2) receive that power is rotated and with outer gear (320) engagement, compression refrigerant; Compressed board (340) is connected with compression cylinder (310), and is provided with thereunder.
10. gear type compressor according to claim 1, it is characterized in that, described gear type bulge (4) comprises expansion oplate (400), expansion cylinder block (410), outer gear (420), internal gear (430), supplementary bearing (440) is formed, and expansion oplate (400) is arranged on the below of the compressed board (340) of gear type press part (3); Annular expansion cylinder block (410) is arranged on the below of expansion oplate (400), and is attached thereto; Outer gear (420) rotatably is arranged on the inner space of expansion cylinder block (410); Internal gear (430) is arranged on the inboard of outer gear (420), is rotated and meshes with outer gear (420) from motor (2) reception power, allows refrigerant expand; Supplementary bearing (440) is arranged on the below of expansion cylinder block (410), and is attached thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410019350 CN1704604A (en) | 2004-05-27 | 2004-05-27 | Gear type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410019350 CN1704604A (en) | 2004-05-27 | 2004-05-27 | Gear type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1704604A true CN1704604A (en) | 2005-12-07 |
Family
ID=35576687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410019350 Pending CN1704604A (en) | 2004-05-27 | 2004-05-27 | Gear type compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1704604A (en) |
-
2004
- 2004-05-27 CN CN 200410019350 patent/CN1704604A/en active Pending
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