CN203516107U - Rotary compressor - Google Patents
Rotary compressor Download PDFInfo
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- CN203516107U CN203516107U CN201320617599.4U CN201320617599U CN203516107U CN 203516107 U CN203516107 U CN 203516107U CN 201320617599 U CN201320617599 U CN 201320617599U CN 203516107 U CN203516107 U CN 203516107U
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- 230000006835 compression Effects 0.000 claims abstract description 19
- 238000007906 compression Methods 0.000 claims abstract description 19
- 238000000926 separation method Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 10
- 239000003507 refrigerant Substances 0.000 description 9
- 238000009434 installation Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a rotary compressor. The rotary compressor (100) is provided with a compression mechanism part; the compression mechanism part is provided with a piston (20) which is arranged on an eccentric part (4c) of a crankshaft (4) in a free sliding manner, a cylinder body (7) in which a cylindrical cylinder chamber is formed and on which the eccentric part (4c) and the piston (20) are arranged, and a blade (9) for dividing the cylinder chamber into a low-pressure space and a high-pressure space; furthermore, the piston (20) consists of an inner circumferential side piston (21) arranged on the peripheral surface of the eccentric part (4c) in the free sliding manner and an outer circumferential piston (22) arranged on the peripheral surface of the inner circumferential side piston (21); the inner circumferential side piston (21) is cut into a plurality of arc parts (21a) through the section of the central shaft along the eccentric part (4c).
Description
Technical field
The utility model relates to the rotary compressor of the compression of the refrigerant gas for carrying out using in the refrigeration cycle of the refrigerating air-conditionings such as air conditioner, refrigerator.
Background technique
In the past, proposing had following rotary compressor (rotary compressor), and this rotary compressor possesses: piston, and this piston is installed on the eccentric part of bent axle in the mode of sliding freely; Cylinder body, this cylinder body is formed with cylinder cylindraceous chamber, and above-mentioned cylinder configuration is in this cylinder chamber; And blade, this blade is low-voltage space and high-pressure space by cylinder indoor separation.For this rotary compressor, the space of being separated by the indoor side face of cylinder, piston outer circumferential face and blade forms pressing chamber, by piston, is carried out eccentric rotary motion and the indoor refrigeration agent of suction cylinder is compressed cylinder is indoor.In this rotary compressor in the past, also propose to have the rotary compressor that piston is divided into a plurality of parts and forms.
For example, in the rotary compressor in the past forming piston is divided into a plurality of parts, as the rotary compressor of having realized the wearing and tearing that prevent the piston outer circumferential face that produces because of the slip between blade and the outer circumferential face of piston, proposition has following rotary compressor: " piston of rotary compressor is formed to the double layer construction consisting of the first roller 16a in outside and the second roller 16a of inner side, and the connection internal surface of above-mentioned second roller 16b and the hole of outer surface 24 are set " (with reference to patent documentation 1).
Patent documentation 1: Japanese kokai publication hei 5-256282 communique (summary, Fig. 1,2)
The rotary compressor of recording for patent documentation 1, the inner circumferential side piston (being designated as second roller 16b in patent documentation 1) that is installed on eccentric part in the mode of sliding is freely formed by the one thing of drum.And then, the main shaft of the bent axle with eccentric part adjacency or countershaft break-through are being installed on to eccentric part by this inner circumferential side piston after the piston of inner circumferential side.Therefore, the rotary compressor of recording for patent documentation 1, need to form outer circumferential face (eccentric part with the outer circumferential face eccentric direction opposition side) structure more outstanding than the outer circumferential face of main shaft or countershaft of the anti-eccentric side of eccentric part.Or need to form the coplanar shape of the outer circumferential face of anti-eccentric side of eccentric part and the outer circumferential face of main shaft or countershaft.
; as shown in Figure 7 A; in the situation that offset (distance between the central shaft of the central shaft of main shaft 4a and countershaft 4b and eccentric part 4c) that the radius of eccentric part 4c is Re, eccentric part 4c is e, the distance from the central shaft of main shaft 4a and countershaft 4b to the outer circumferential face of the anti-eccentric side of eccentric part 4c is Re-e.Therefore, the rotary compressor of recording for patent documentation 1, in the situation that inner circumferential side piston 50 is installed on to eccentric part 4c from main shaft 4a side, if the radius of main shaft 4a is Rm, needs so that the mode of Re-e >=Rm forms bent axle 4.And the rotary compressor of recording for patent documentation 1, in the situation that inner circumferential side piston 50 is installed on to eccentric part 4c from countershaft 4b side, if the radius of countershaft 4b is Ra, needs so that the mode of Re-e >=Ra forms bent axle 4.
This be because, as shown in Figure 7 B, if form eccentric part 4c anti-eccentric side outer circumferential face than the structure of the outer circumferential face depression of main shaft 4a or countershaft 4b (, Re-e<Rm in the situation that inner circumferential side piston 50 is installed on to eccentric part 4c from main shaft 4a side, inner circumferential side piston 50 is installed on to Re-e<Ra the situation of eccentric part 4c from countershaft 4b side), when wish is installed on eccentric part 4c by inner circumferential side piston 50, eccentric part 4c and piston 50 are interfered, and inner circumferential side piston 50 cannot be installed on to eccentric part 4c.
On the other hand, if wish expands discharge capacity in order to strengthen the ability (high output) of rotary compressor, need to suppress piston external diameter expansion and increase the offset (with respect to the main shaft of bent axle and the offset of countershaft) of piston.That is,, if wish expands discharge capacity in order to strengthen the ability of rotary compressor, when needing to suppress the expansion of external diameter of eccentric part, increase the offset (with respect to the main shaft of bent axle and the offset of countershaft) of eccentric part.And then, if increase the offset of eccentric part in the expansion of external diameter that suppresses eccentric part, can form eccentric part 4c anti-eccentric side outer circumferential face than the state of the outer circumferential face depression of main shaft 4a or countershaft 4b (, Re-e<Rm, or the state of Re-e<Ra).
Yet, as having illustrated in Fig. 7 A, Fig. 7 B, the rotary compressor of recording for patent documentation 1, if the relation between the outer circumferential face of the outer circumferential face of the anti-eccentric side of eccentric part and main shaft or countershaft is not Re-e >=Rm or Re-e >=Ra, cannot be installed on eccentric part by piston.Therefore, the rotary compressor of recording for patent documentation 1, there are the following problems: cannot in the expansion of external diameter that suppresses eccentric part, increase the offset of eccentric part, until form the state that the outer circumferential face of the anti-eccentric side of eccentric part 4c caves in than the outer circumferential face of main shaft 4a or countershaft 4b, so there is limit in the increase of the ability of rotary compressor.
Herein, as the method that increases the discharge capacity of rotary compressor, consider to make eccentric part and piston offset maintain former state, and increase the height of piston and cylinder body.Yet between the outer circumferential face (outer circumferential face of the eccentric direction side of eccentric part) and the indoor side face of cylinder of the eccentric side of piston, forming is the sealed department of low-voltage space and high-pressure space by cylinder indoor separation.Therefore,, if increase the height of piston and cylinder body, the length of sealing portion can increase.Thereby, there is following problem: thereby in the situation that want to increase the ability that the height of piston and cylinder body increases rotary compressor, the refrigerant gas of high-pressure space side can leak towards low-voltage space side, cause the weight flow that is sucked into the refrigerant gas of (cylinder is indoor) in pressing chamber to reduce, cause the efficiency of rotary compressor significantly to worsen.
Model utility content
The utility model completes in order to solve above-mentioned problem, and its object is to provide a kind of space, high pressure side and sealing between low voltage side space that can prevent that cylinder is indoor to worsen, and can increase the rotary compressor of the discharge capacity of axle rotary compressor.
The related rotary compressor of the utility model possesses: motor, and this motor has stator and rotor, bent axle, this bent axle is driven by above-mentioned motor, has: main shaft, this main shaft is fixed on above-mentioned rotor, countershaft, this countershaft is arranged at the axial opposed side of above-mentioned main shaft, and eccentric part, this eccentric part is formed between above-mentioned main shaft and above-mentioned countershaft, compression mechanical part, this compression mechanical part has: piston, this piston is installed on above-mentioned eccentric part in the mode of sliding freely, cylinder body, this cylinder body is formed with cylinder cylindraceous chamber, and above-mentioned eccentric part and above-mentioned cylinder configuration are in this cylinder chamber, and blade, this blade is low-voltage space and high-pressure space by above-mentioned cylinder indoor separation, and seal container, this seal container is taken in above-mentioned motor, above-mentioned bent axle and above-mentioned compressor structure portion, above-mentioned rotary compressor is characterised in that, above-mentioned piston consists of inner circumferential side piston and outer circumferential side piston, above-mentioned inner circumferential side piston is arranged at the outer circumferential face of above-mentioned eccentric part in the mode of sliding freely, above-mentioned outer circumferential side piston is arranged at the outer circumferential face of above-mentioned inner circumferential side piston, above-mentioned inner circumferential side piston is divided into the cross section utilizing along the central shaft of above-mentioned eccentric part and cuts off a plurality of circular-arc parts that form, at least one in above-mentioned circular-arc parts and above-mentioned outer circumferential side piston are fixed together by fixation arrangement.
In the related rotary compressor of the utility model, piston is arranged at the outer circumferential face of eccentric part inner circumferential side piston by the mode to slide freely forms with the outer circumferential side piston that is arranged at the outer circumferential face of this inner circumferential side piston.And inner circumferential side piston is divided into the cross section utilizing along the central shaft of eccentric part and cuts off a plurality of circular-arc parts that form.Therefore, can each circular-arc parts to be installed in the mode of utilizing a plurality of circular-arc parts (from the vertical direction of the central shaft with eccentric part) to clamp eccentric part be inner circumferential side piston to the related rotary compressor of the utility model.Therefore,, even if bent axle forms the structure that the outer circumferential face of the anti-eccentric side of eccentric part 4c caves in than the outer circumferential face of main shaft 4a or countershaft 4b, also inner circumferential side piston can be installed on to eccentric part.Thereby, for the related rotary compressor of the utility model, without the height that increases piston and cylinder body, just can increase discharge capacity.
That is, the related rotary compressor of the utility model can not cause the significant degradation in efficiency that the refrigrant leakage because of the sealed department place between piston and the indoor side face of cylinder causes, and can increase discharge capacity.In other words, for the related rotary compressor of the utility model, in the situation that not changing discharge capacity, compare the height that can reduce piston and cylinder body with rotary compressor in the past, and the refrigrant leakage that can suppress the sealed department place between piston and the indoor side face of cylinder compared with the past.
Thereby the utility model can provide a kind of rotary compressor that can realize high output and high efficiency compared with the past.
Herein, the related rotary compressor of the utility model forms the structure that piston is divided into inner circumferential side piston and outer circumferential side piston.Therefore, touch people of the present utility model and may worry that the slippage loss because producing between the outer circumferential face at inner circumferential side piston and the inner peripheral surface of outer circumferential side piston causes rotary compressor Efficiency Decreasing.Yet for the related rotary compressor of the utility model, at least one of the circular-arc parts of formation inner circumferential side piston and outer circumferential side piston are fixed together by fixation arrangement.Therefore,, for the related rotary compressor of the utility model, inner circumferential side piston and relatively moving of outer circumferential side piston are limited.Thereby the related rotary compressor of the utility model can prevent that the slippage loss because producing between the outer circumferential face at inner circumferential side piston and the inner peripheral surface of outer circumferential side piston from causing the Efficiency Decreasing of rotary compressor.
Accompanying drawing explanation
Fig. 1 is the longitudinal section that the related rotary compressor of mode of execution of the present utility model is shown.
Fig. 2 is the sectional elevation that the compression mechanical part of the related rotary compressor of mode of execution of the present utility model is shown.
Fig. 3 A, Fig. 3 B are that Fig. 3 A is the longitudinal section that bent axle and inner circumferential side piston are shown for the explanatory drawing of the inner circumferential side piston of the rotary compressor that mode of execution of the present utility model is related is described, Fig. 3 B is the planimetric map that inner circumferential side piston is shown.
Fig. 4 is for illustrating that the piston of the rotary compressor that mode of execution of the present utility model is related is with respect to the figure of the installation method of eccentric part, is the stereogram that inner circumferential side piston is assembled in the state before the eccentric part of bent axle is shown.
Fig. 5 A, Fig. 5 B are for illustrating that the piston of the rotary compressor that mode of execution of the present utility model is related is with respect to the figure of the installation method of eccentric part, be the eccentric part that inner circumferential side piston is installed in bent axle is shown after and outer circumferential side piston is installed on to the figure of the state before this inner circumferential side piston.Fig. 5 A illustrates the stereogram that inner circumferential side piston is inserted in to outer circumferential side piston state before.Fig. 5 B illustrates the stereogram that inner circumferential side piston is inserted in to the state midway of outer circumferential side piston.
Fig. 6 A, Fig. 6 B, Fig. 6 C are for illustrating that the piston of the rotary compressor that mode of execution of the present utility model is related is with respect to the figure of the installation method of eccentric part, be the eccentric part that inner circumferential side piston is installed in bent axle is shown after so that outer circumferential side piston is installed on to the figure of the state after this inner circumferential side piston.Fig. 6 A illustrates the longitudinal section that outer circumferential side piston is assembled in to the state after the piston of inner circumferential side.Fig. 6 B illustrates the stereogram that outer circumferential side piston is assembled in to the state after the piston of inner circumferential side.Fig. 6 C illustrates the planimetric map that outer circumferential side piston is assembled in to the state after the piston of inner circumferential side.
Fig. 7 A, Fig. 7 B are near the details drawings of eccentric part that rotary compressor is in the past shown.
Label declaration
1: seal container; 2: motor; 2a: stator; 2b: rotor; 3: compression mechanical part; 4: bent axle; 4a: main shaft; 4b: countershaft; 4c: eccentric part; 5: main bearing; 6: supplementary bearing; 7: cylinder body; 9: blade; 10: suck connecting pipe; 11: discharge tube; 12: gas receiver; 20: piston; 21: inner circumferential side piston; 21a: circular-arc parts; 21b: groove; 22: outer circumferential side piston; 22b: groove; 23: fixing pin; 25: fixed mechanism; 50: inner circumferential side piston (in the past); 100: rotary compressor.
Embodiment
Mode of execution
Fig. 1 is the longitudinal section that the related rotary compressor of mode of execution of the present utility model is shown.Fig. 2 is the sectional elevation that the compression mechanical part of this rotary compressor is shown.And Fig. 3 A, Fig. 3 B are that Fig. 3 A is the longitudinal section that bent axle and inner circumferential side piston are shown for the explanatory drawing of the inner circumferential side piston of this rotary compressor is described, Fig. 3 B is the planimetric map that inner circumferential side piston is shown.
Below, with reference to Fig. 1～Fig. 3 A, Fig. 3 B, the structure of the related rotary compressor of the utility model is described.
Bent axle 4 has: the main shaft 4a that is fixed on the rotor 2b of motor 2; Be arranged at the countershaft 4b of the opposition side of main shaft 4a; And be formed on the eccentric part 4c between main shaft 4a and countershaft 4b.
And, in the present embodiment, form as follows the shape of bent axle 4.That is, in the present embodiment, in order to increase the discharge capacity of rotary compressor 100, when the external diameter that suppresses eccentric part 4c expands, increase the offset (with respect to the offset of main shaft 4a and countershaft 4b) of eccentric part 4c.Therefore the outer circumferential face (with the outer circumferential face of the eccentric direction opposition side of eccentric part 4c) of anti-eccentric side of eccentric part 4c that, forms bent axle 4 is than the shape of the peripheral part depression of main shaft 4a and countershaft 4b.In other words, in the situation that the offset (distance between the central shaft of the central shaft of main shaft 4a and countershaft 4b and eccentric part 4c) that the radius of eccentric part 4c is Re, eccentric part 4c is e, the distance from the central shaft of main shaft 4a and countershaft 4b to the outer circumferential face of the anti-eccentric side of eccentric part 4c is Re-e.Therefore, if the radius of main shaft 4a is Rm, the radius of countershaft 4b is Ra, for the bent axle 4 of rotary compressor 100, and Re-e<Rm, and Re-e<Ra sets up.
The bent axle 4 forming is by this way to rotate freely by main bearing 5 and supplementary bearing 6 supportings.Specifically, main bearing 5 is arranged at the top of compression mechanical part 3, by the main shaft 4a supporting of bent axle 4, is to rotate freely.And supplementary bearing 6 is arranged at the bottom of compressing mechanism 3, by the countershaft 4b supporting of bent axle 4, be to rotate freely.
Compression mechanical part 3 possesses cylinder body 7, piston 20 and blade 9 etc.
In the present embodiment, in the mode of Fig. 2 and Fig. 3 A, Fig. 3 B, form piston 20 herein.
That is, piston 20 consists of with the outer circumferential side piston 22 that is arranged at the outer circumferential face of this inner circumferential side piston 21 the inner circumferential side piston 21 that is arranged at the outer circumferential face of eccentric part 4c in slip mode freely.And inner circumferential side piston 21 is by utilizing a plurality of circular-arc parts 21a being split to form along the cross section of the central shaft of eccentric part 4c to form.In addition, in the present embodiment, utilize two circular-arc parts 21a to form inner circumferential side piston 21.
In addition, in the present embodiment, forming between the circular-arc parts 21a and outer circumferential side piston 22 of inner circumferential side piston 21, be provided with fixation arrangement 25, this fixation arrangement 25 is for being fixed so that the two cannot relatively move circular-arc parts 21a and outer circumferential side piston 22.This fixation arrangement 25 by being formed at the groove 21b of the outer circumferential face of circular-arc parts 21a, groove 22b and the fixing pin 23 that is formed at the inner peripheral surface of outer circumferential side piston 22 forms.The groove 21b of circular-arc parts 21a and the groove 22b of outer circumferential side piston 22 form along the central axis direction of eccentric part 4c.And fixing pin 23 is inserted between the groove 21b of circular-arc parts 21a and the groove 22b of outer circumferential side piston 22.By fixing pin being inserted between the groove 21b of circular-arc parts 21a and the groove 22b of outer circumferential side piston 22, the circular-arc parts 21a and the outer circumferential side piston 22 that are formed with groove 21b are fixed, thereby relatively moving of the two is limited.
In addition, by a circular-arc parts 21a and outer circumferential side piston 22 are fixed together, the circular-arc parts 21a and the relatively moving of outer circumferential side piston 22 that do not form groove 21b are also limited.Therefore,, by utilizing fixation arrangement 25 that at least one circular-arc parts 21a and outer circumferential side piston 22 are fixed together, can limit the relative action of inner circumferential side piston 21 and outer circumferential side piston 22.
For the rotary compressor 100 forming in the above described manner, by rotor, 2b rotates, and is embedded in bent axle 4 rotations of rotor 2b.Thus, the piston 20 that is installed on the eccentric part 4c of bent axle 4 in the mode of sliding freely carries out eccentric rotary motion the cylinder of cylinder body 7 is indoor.And then, follow the eccentric rotary motion of piston 20, the volume in the space, high pressure side of cylinder body 7 reduces gradually, and the refrigerant gas in space, high pressure side is compressed.Refrigerant gas after this is compressed is sent to outside from discharge tube 11 afterwards in being discharged to seal container 1.In addition, be provided with adjacently gas receiver 12 with seal container 1, this gas receiver 12 is communicated with the cylinder chamber of cylinder body 7 via sucking connecting pipe 10.That is, refrigerant gas is sent to the cylinder chamber of cylinder body 7 via gas receiver 12 and suction connecting pipe 10.
Next, with reference to Fig. 4～Fig. 6 A, Fig. 6 B, Fig. 6 C, to piston 20 being installed on to the method for the eccentric part 4c of bent axle 4, describe.
Fig. 4 is for illustrating that the piston of the rotary compressor that mode of execution of the present utility model is related is with respect to the figure of the installation method of eccentric part, is the stereogram that inner circumferential side piston is assembled in to the state before the eccentric part of bent axle is shown.Fig. 5 A, Fig. 5 B are for illustrating that the piston of the rotary compressor that mode of execution of the present utility model is related is with respect to the figure of the installation method of eccentric part, be the eccentric part that inner circumferential side piston is installed in bent axle is shown after and outer circumferential side piston is installed on to the figure of the state before this inner circumferential side piston.And, Fig. 6 A, Fig. 6 B, Fig. 6 C are for illustrating that the piston of the rotary compressor that mode of execution of the present utility model is related is with respect to the figure of the installation method of eccentric part, be the eccentric part that inner circumferential side piston is installed in bent axle is shown after so that outer circumferential side piston is installed on to the figure of the state after this inner circumferential side piston.In addition, Fig. 5 A illustrates the stereogram that inner circumferential side piston is inserted in to outer circumferential side piston state before.Fig. 5 B illustrates the stereogram that inner circumferential side piston is inserted in to the state midway of outer circumferential side piston.Fig. 6 A illustrates the longitudinal section that outer circumferential side piston is assembled in to the state after the piston of inner circumferential side.Fig. 6 B illustrates the stereogram that outer circumferential side piston is assembled in to the state after the piston of inner circumferential side.Fig. 6 C illustrates the planimetric map that outer circumferential side piston is assembled in to the state after the piston of inner circumferential side.In addition, in Fig. 6 C, omitted the diagram of bent axle.
In the situation that piston 20 is installed on to the eccentric part 4c of bent axle 4, first, as shown in Figure 4, inner circumferential side piston 21 is installed on to eccentric part 4c.Specifically the mode that two circular-arc parts 21a that, form inner circumferential side piston 21 to utilize clamp eccentric part 4c is inner circumferential side piston 21 by two circular-arc parts 21a() be installed on eccentric part 4c.In other words, two circular-arc parts 21a that form inner circumferential side piston 21 are installed on to eccentric part 4c from the vertical direction of the central shaft with eccentric part 4c.
As mentioned above, the inner circumferential side piston of rotary compressor is in the past formed by one thing.Therefore,, for rotary compressor in the past, for inner circumferential side piston being installed on to the eccentric part of bent axle, need to form the outer circumferential face structure more outstanding than the outer circumferential face of main shaft or countershaft of the anti-eccentric side of eccentric part.Or, need to form the coplanar shape of the outer circumferential face of anti-eccentric side of eccentric part and the outer circumferential face of main shaft or countershaft.In other words, for rotary compressor in the past, inner circumferential side piston cannot be installed on to the outer circumferential face of anti-eccentric side of the bent axle 4(eccentric part 4c with the such shape of present embodiment than the bent axle of the shape of the peripheral part depression of main shaft 4a and countershaft 4b).Yet, as in this embodiment, by utilizing two circular-arc parts 21a to form inner circumferential side pistons 21, inner circumferential side piston 21 can be installed on to the outer circumferential face of anti-eccentric side of eccentric part 4c than the bent axle 4 of the shape of the peripheral part depression of main shaft 4a and countershaft 4b.
After inner circumferential side piston 21 being installed on to the eccentric part 4c of bent axle 4 as shown in Figure 4, as shown in Fig. 5 A, Fig. 5 B and Fig. 6 A, Fig. 6 B, Fig. 6 C, outer circumferential side piston is installed on to the outer circumferential face of this inner circumferential side piston 21.Specifically, make main shaft 4a or countershaft 4b by forming the roughly outer circumferential side piston 22 of one thing cylindraceous.Afterwards, inner circumferential side piston 21 is inserted to this outer circumferential side piston 22.And, inner circumferential side piston 21 is being inserted in to outer circumferential side piston 22 midway, make the position consistency of groove 22b with the groove 21b of the circular-arc parts 21a of formation inner circumferential side piston 21 of outer circumferential side piston 22, and fixing pin 23 is inserted between two grooves.Finally, inner circumferential side piston 21 is inserted in to outer circumferential side piston 22, again fixing pin 23 is inserted in completely between the groove 22b of outer circumferential side piston 22 and the groove 21b of the circular-arc parts 21a of formation inner circumferential side piston 21, thus, completes piston 20 with respect to the installation of eccentric part 4c.
In addition, in the present embodiment, as shown in Fig. 3 A, Fig. 3 B, in the situation that the radius of inner circumferential side piston 21 is Rp, Rp-e is the value larger than the radius R m of main shaft 4a.Therefore, at inner circumferential side piston 21, be installed under the state after eccentric part 4c, form the outer circumferential face structure more outstanding than the outer circumferential face of main shaft 4a of the anti-eccentric side of inner circumferential side piston 21.Therefore, can outer circumferential side piston 22 be installed on to eccentric part 4c from main shaft 4a side.And in the present embodiment, as shown in Fig. 3 A, Fig. 3 B, in the situation that the radius of inner circumferential side piston 21 is Rp, Rp-e is the value larger than the radius R a of countershaft 4b.Therefore, at inner circumferential side piston 21, be installed under the state after eccentric part 4c, form the outer circumferential face structure more outstanding than the outer circumferential face of countershaft 4b of the anti-eccentric side of inner circumferential side piston 21.Therefore, can outer circumferential side piston 22 be installed on to eccentric part 4c from countershaft 4b side.
And, in the present embodiment, inner circumferential side piston 21 is being inserted in to outer circumferential side piston 22 midway, fixing pin 23 is inserted between the groove 22b of outer circumferential side piston 22 and the groove 21b of the circular-arc parts 21a of formation inner circumferential side piston 21 completely.But be not limited to this, also can after inner circumferential side piston 21 is inserted in to outer circumferential side piston 22 completely, make again the position consistency of groove 22b with the groove 21b of the circular-arc parts 21a of formation inner circumferential side piston 21 of outer circumferential side piston 22, and fixing pin 23 is inserted between two grooves.
Above, the rotary compressor 100 forming in the mode of present embodiment can obtain following effect.
That is, as mentioned above, the inner circumferential side piston of rotary compressor is in the past formed by one thing.Therefore,, for rotary compressor in the past, for inner circumferential side piston being installed on to the eccentric part of bent axle, need to form the outer circumferential face structure more outstanding than the outer circumferential face of main shaft or countershaft of the anti-eccentric side of eccentric part.Or, need to form the coplanar shape of the outer circumferential face of anti-eccentric side of eccentric part and the outer circumferential face of main shaft or countershaft.Therefore, for rotary compressor in the past, this structural limitations the expansion of discharge capacity.Yet, for the related rotary compressor of present embodiment, there is not such restriction, inner circumferential side piston 21 can be installed on to the outer circumferential face of anti-eccentric side of eccentric part 4c than the bent axle 4 of the shape of the peripheral part depression of main shaft 4a and countershaft 4b.Thereby the related rotary compressor of present embodiment does not exist restriction as described above, can realize the expansion (can realize high output) of discharge capacity.
Herein, as the method that increases the discharge capacity of rotary compressor, consider to keep the offset of eccentric part and piston and the height that increases piston and cylinder body.Yet, between the outer circumferential face of the eccentric side of piston (outer circumferential face of the eccentric direction side of eccentric part) and the indoor side face of cylinder, become the sealed department that cylinder indoor separation is become to low-voltage space and high-pressure space.Therefore,, if increase the height of piston and cylinder body, the length of sealing portion also can increase.Thereby, in the situation that seek the ability of rotary compressor by increasing the height of piston and cylinder body, expand, the refrigerant gas of high-pressure space side can leak into low-voltage space side, the weight flow that is inhaled into the refrigerant gas of (cylinder is indoor) in pressing chamber is reduced, thereby cause the significant degradation in efficiency of rotary compressor.Yet, for the related rotary compressor 100 of present embodiment, as mentioned above, without the height that increases piston 20 and cylinder body 7, just can expand discharge capacity.That is, for the related rotary compressor 100 of present embodiment, can not cause the significant degradation in efficiency that the refrigrant leakage because of the sealed department place between piston 20 and the indoor side face of cylinder occurs, can expand discharge capacity.
In other words, improve the efficiency of rotary compressor in order not change discharge capacity, reduce the height of piston 20 and cylinder body 7, the amount of cutting down the refrigerant gas leaking from high-pressure space side towards low-voltage space side at the sealed department place being formed between the two is important.Now, in order not change discharge capacity, reduce the height of piston and cylinder body, need to increase the offset of crankshaft eccentric portion.Yet, for rotary compressor in the past, due to above-mentioned restriction, cannot significantly increase the offset of eccentric part.Therefore,, for rotary compressor in the past, the amplitude of improved efficiency is very little.On the other hand, for the related rotary compressor 100 of present embodiment, owing to not being subject to above-mentioned restriction, therefore compare the offset that in the past can increase eccentric part 4c.Therefore, the related rotary compressor 100 of present embodiment was compared in the past and can be improved fully efficiency.
And, in order not change discharge capacity, improve the efficiency of rotary compressor, in order to reduce the Sliding velocity of the outer circumferential face of eccentric part and the inner peripheral surface of piston, the radius (being in other words diameter) that dwindles eccentric part is important.Yet, for rotary compressor in the past, owing to there being above-mentioned restriction, when wish increases the offset of eccentric part, cannot significantly dwindle the radius of eccentric part.If dwindle the radius of eccentric part, the outer circumferential face of the anti-eccentric side of eccentric part is than the outer circumferential face depression of main shaft or countershaft.Therefore, for rotary compressor in the past, very little by dwindling the improved efficiency amplitude that the radius of eccentric part realizes.Therefore on the other hand, for the related rotary compressor 100 of present embodiment, owing to not being subject to above-mentioned restriction, when the offset of eccentric part 4c is as in the past, compare the radius that in the past can dwindle eccentric part 4c.Therefore, the related rotary compressor 100 of present embodiment can further improve efficiency.
And the related rotary compressor 100 of present embodiment forms the structure that piston 20 is split into outer circumferential side piston 22 and inner circumferential side piston 21.Therefore, there are the misgivings that cause rotary compressor 100 Efficiency Decreasings due to the slippage loss producing between the outer circumferential face at inner circumferential side piston 21 and the inner peripheral surface of outer circumferential side piston 22.Yet, for the related rotary compressor 100 of present embodiment, utilize fixation arrangement 25 that at least one and the outer circumferential side piston 22 that form in the circular-arc parts 21a of inner circumferential side piston 21 are fixed together.Therefore,, for the related rotary compressor 100 of present embodiment, inner circumferential side piston 21 is limited with relatively moving of outer circumferential side piston 22.Thereby, for the related rotary compressor 100 of present embodiment, can prevent from causing due to the slippage loss producing between the outer circumferential face at inner circumferential side piston 21 and the inner peripheral surface of outer circumferential side piston 22 Efficiency Decreasing of rotary compressor 100.
In addition, in the present embodiment, to inner circumferential side piston 21 being divided into the example of two circular-arc parts 21a, be illustrated, but inner circumferential side piston 21 can certainly be divided into three above circular-arc parts 21a.A plurality of by the quantity that forms the circular-arc parts 21a of inner circumferential side piston 21 is made as, the size that can dwindle the blank using when manufacturing inner circumferential side piston 21, so yield rate raising, and then the efficiency of loading in blank conveying also improves.That is, a plurality of by the quantity that forms the circular-arc parts 21a of inner circumferential side piston 21 is made as, can play the effect that cheap for manufacturing cost and efficient rotary compressor 100 can be provided.
And, in the present embodiment, to thering is the rotary compressor 100 of a compression mechanical part 3, be illustrated, but rotary compressor 100 also can form the multi-cylinder body rotary compressor with a plurality of compression mechanical parts 3.In this case, be formed with a plurality of eccentric part 4c between main shaft 4a and countershaft 4b, these eccentric parts 4c is connected by jack shaft.And corresponding each eccentric part 4c is provided with a plurality of cylinder bodies 7, between each cylinder body 7, the end face of the cylinder chamber of opening is sealed by the dividing plate being arranged between cylinder body 7.In addition, in the situation that rotary compressor 100 is configured to multi-cylinder body rotary compressor, preferably each eccentric part 4c is configured to the central shaft axisymmetric with respect to main shaft 4a and countershaft 4b.For example, in the situation that rotary compressor 100 is configured to twin-rotor housing rotary compressor, preferably with respect to the central shaft of main shaft 4a and countershaft 4b, with the phase difference of 180 °, form two eccentric part 4c.By forming by this way each eccentric part 4c, can suppress vibration that the rotation due to bent axle 4 causes etc.
And, in the present embodiment, utilize the groove 21b of the outer circumferential face be formed at circular-arc parts 21a, groove 22b and the fixing pin 23 that is formed at the inner peripheral surface of outer circumferential side piston 22 to form fixation arrangement 25, but the structure of fixation arrangement 25 is not limited to this.
For example, fixation arrangement 25 also can form following structure: at the outer circumferential face of circular-arc parts 21a and the inner peripheral surface of outer circumferential side piston 22, form keyway, and in keyway, insert key.
And for example, fixation arrangement 25 also can form following structure: the inner peripheral surface of the outer circumferential face of circular-arc parts 21a and outer circumferential side piston 22 is formed polygon-shaped etc.; At the outer circumferential face of circular-arc parts 21a and the inner peripheral surface of outer circumferential side piston 22, form concavo-convexly, and make the concavo-convex engagement of the concavo-convex of circular-arc parts 21a and outer circumferential side piston 22.That is, also can form the fixation arrangement 25 with profile of tooth structure.
And the permanent fixed structure such as for example, fixation arrangement 25 can be also shrink fit, shrink-fit, be pressed into.
And for example, fixation arrangement 25 can also be the fixed structure that uses the chemical substances such as binder to carry out.
Claims (5)
1. a rotary compressor, possesses:
Motor, this motor has stator and rotor;
Bent axle, this bent axle is driven by described motor, has: main shaft, this main shaft is fixed on described rotor; Countershaft, this countershaft is arranged at the axial opposed side of described main shaft; And eccentric part, this eccentric part is formed between described main shaft and described countershaft;
Compression mechanical part, this compression mechanical part has: piston, this piston is installed on described eccentric part in the mode of sliding freely; Cylinder body, this cylinder body is formed with cylinder cylindraceous chamber, and described eccentric part and described cylinder configuration are in this cylinder chamber; And blade, this blade is low-voltage space and high-pressure space by described cylinder indoor separation; And
Seal container, this seal container is taken in described motor, described bent axle and described compression mechanical part,
Described rotary compressor is characterised in that,
Described piston consists of inner circumferential side piston and outer circumferential side piston, and described inner circumferential side piston is arranged at the outer circumferential face of described eccentric part in the mode of sliding freely, and described outer circumferential side piston is arranged at the outer circumferential face of described inner circumferential side piston,
Described inner circumferential side piston is divided into the cross section utilizing along the central shaft of described eccentric part and cuts off a plurality of circular-arc parts that form,
At least one in described circular-arc parts and described outer circumferential side piston are fixed together by fixation arrangement.
2. rotary compressor according to claim 1, is characterized in that,
Described inner circumferential side piston consists of three above described circular-arc parts.
3. rotary compressor according to claim 1, is characterized in that,
When the radius of the described main shaft radius that is Rm, described eccentric part the radius that is Re, described inner circumferential side piston the offset that is Rp, described eccentric part is e,
The relation with Re-e<Rm<Rp-e.
4. rotary compressor according to claim 1, is characterized in that,
When the radius of the described countershaft radius that is Ra, described eccentric part the radius that is Re, described inner circumferential side piston the offset that is Rp, described eccentric part is e,
The relation with Re-e<Ra<Rp-e.
5. according to the rotary compressor described in any one in claim 1 to 4, it is characterized in that,
Described eccentric part and the described compression mechanical part of described bent axle are provided with a plurality of.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-219216 | 2012-10-01 | ||
| JP2012219216A JP5766166B2 (en) | 2012-10-01 | 2012-10-01 | Rotary compressor |
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| Publication Number | Publication Date |
|---|---|
| CN203516107U true CN203516107U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320617599.4U Expired - Lifetime CN203516107U (en) | 2012-10-01 | 2013-10-08 | Rotary compressor |
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| Country | Link |
|---|---|
| JP (1) | JP5766166B2 (en) |
| CN (1) | CN203516107U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100525A (en) * | 2014-07-02 | 2014-10-15 | 广东美芝制冷设备有限公司 | Refrigerating circulating device and rotating type compressor thereof |
| CN113068990A (en) * | 2021-04-13 | 2021-07-06 | 冯晔 | Hammer mill |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015188694A (en) * | 2014-03-28 | 2015-11-02 | 株式会社大一商会 | Game machine |
| CN115126697B (en) * | 2022-06-02 | 2023-04-25 | 广州市德善数控科技有限公司 | Compressor pump body, compressor and temperature regulating system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3307100B2 (en) * | 1994-09-19 | 2002-07-24 | 株式会社日立製作所 | Rotary compressor |
| KR100452774B1 (en) * | 2002-10-09 | 2004-10-14 | 삼성전자주식회사 | Rotary Compressor |
-
2012
- 2012-10-01 JP JP2012219216A patent/JP5766166B2/en not_active Expired - Fee Related
-
2013
- 2013-10-08 CN CN201320617599.4U patent/CN203516107U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100525A (en) * | 2014-07-02 | 2014-10-15 | 广东美芝制冷设备有限公司 | Refrigerating circulating device and rotating type compressor thereof |
| CN113068990A (en) * | 2021-04-13 | 2021-07-06 | 冯晔 | Hammer mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014070620A (en) | 2014-04-21 |
| JP5766166B2 (en) | 2015-08-19 |
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