CN103511257A - Rotary compressor and crank shaft assembly thereof - Google Patents
Rotary compressor and crank shaft assembly thereof Download PDFInfo
- Publication number
- CN103511257A CN103511257A CN201210480920.9A CN201210480920A CN103511257A CN 103511257 A CN103511257 A CN 103511257A CN 201210480920 A CN201210480920 A CN 201210480920A CN 103511257 A CN103511257 A CN 103511257A
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- eccentric part
- rotary compressor
- recess
- crankshaft group
- bent axle
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Abstract
The invention discloses a crank shaft assembly which is suitable for a rotary compressor. The crank shaft assembly comprises a crank shaft and an eccentric part, wherein the eccentric part is eccentrically sleeved on the crank shaft, a concave part is formed on the periphery surface of the eccentric part, and the size of the concave part in the circumferential direction of the eccentric part is less than the perimeter of the eccentric part. A crank shaft group for the rotary compressor provided by the invention has the advantages that the concave part is arranged on the periphery surface of the eccentric part, the contact area between the eccentric part and a piston of the rotary compressor is effectively reduced, the friction between the eccentric part and the piston of the rotary compressor is reduced, the load in the work of the rotary compressor is reduced, and the energy efficiency of the rotary compressor is effectively improved. The invention also discloses the rotary compressor, wherein the rotary compressor is provided with the crank shaft assembly.
Description
Technical field
The present invention relates to rotary compressor structure field, especially relate to a kind of crankshaft group for rotary compressor and there is its rotary compressor.
Background technique
The eccentric part of traditional rotary compressor is cylindrical, piston (rotor) is set on the outer circumferential face of this eccentric part, the whole inner peripheral surface of piston contacts with the whole outer peripheral surface of eccentric part, when driving piston rotation, eccentric part can, because thereby area of contact increases the frictional force between the two greatly, cause the working load of compressor to raise.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.
For this reason, one object of the present invention is to propose a kind of crankshaft group for rotary compressor, and the eccentric part of described crankshaft group and the area of contact of piston reduce, thereby effectively reduces the working load of rotary compressor.
Another object of the present invention is to propose a kind of rotary compressor.
The crankshaft group for rotary compressor according to first aspect present invention, comprising: bent axle; And eccentric part, described eccentric part is set on described bent axle prejudicially, on the outer circumferential face of described eccentric part, is formed with recess, and the size that described recess made progress in the week of described eccentric part is less than the girth of described eccentric part.
According to the crankshaft group for rotary compressor of the present invention, by be provided with recess on the outer circumferential face of eccentric part, thereby effectively reduced area of contact between eccentric part and the piston of rotary compressor to reduce the friction between the two, load while having reduced rotary compressor work, and then the efficiency of rotary compressor is improved.
In addition, according to the crankshaft group for rotary compressor of the present invention, can also there is following additional technical feature:
In preferred embodiments more of the present invention, the scope of the central angle β that described recess is corresponding is: 0 ° < β≤180 °.
In preferred embodiments more of the present invention, the initial position of described recess is for to be rotated counterclockwise the corresponding position of angle [alpha] from primary importance, wherein said primary importance be the central axis of bent axle described in the crossing Liang Ge position middle distance of the outer circumferential face of the plane that limits of the central axis of described eccentric part and the central axis of described bent axle and described eccentric part compared with Yuan Yige position, and 0 °≤α≤180 °.
In preferred embodiments more of the present invention, described recess described eccentric part axially on height be h, the height of described eccentric part is H, wherein: 0.1≤h/H≤1.
In preferred embodiments more of the present invention, the bottom surface of described recess is straight line or curve in the axial direction Shang cross section that is orthogonal to described eccentric part.
In preferred embodiments more of the present invention, the bottom surface of described recess be arc-shaped surface and with the concyclic heart of outer circumferential face of described eccentric part.
Further, the radius of curvature r of the bottom surface of described recess
1with the pass of the radius R of described eccentric part be: 0.2≤r
1/ R < 1.Bottom surface and the concyclic heart of eccentric part due to recess, therefore very convenient in the process of actual recesses machined, for example can be integrally formed by casting, certainly also can carry out milling process formation to the presumptive area of eccentric part outer circumferential face, in other words, the advantages such as it is simple that the crankshaft group of the preferred embodiment has technique, easy to process, quick, effectively reduce cost.
In other preferred embodiments of the present invention, the bottom surface of described recess be arc-shaped surface and with the concyclic heart of outer circumferential face of described bent axle.
Further, the radius of curvature r of the bottom surface of described recess
2and the pass of the eccentric distance e between the radius R of described eccentric part and described bent axle and described eccentric part is: R-e≤r
2≤ R+e.Bottom surface and the concyclic heart of bent axle due to recess, facilitated equally the processing of recess, for example can be integrally formed by casting, certainly also can carry out milling process formation to the presumptive area of eccentric part outer circumferential face, in other words, it is simple that the crankshaft group of the preferred embodiment has technique equally, easy to process, advantage efficiently, thus effectively reduce cost.
According to the rotary compressor of second aspect present invention, comprise the crankshaft group for rotary compressor of the above-mentioned first aspect according to the present invention.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming embodiment's description, wherein:
Fig. 1 is the stereogram of crankshaft group according to an embodiment of the invention;
Fig. 2 is the plan view of crankshaft group according to an embodiment of the invention;
Fig. 3-Fig. 5 is according to the sectional view of three different embodiments' of the present invention crankshaft group.
Description of reference numerals:
Crankshaft group 100;
Bent axle 1;
Primary importance K.
Embodiment
Describe embodiments of the invention below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment who is described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
Below with reference to Fig. 1-Fig. 5, describe according to the crankshaft group 100 for rotary compressor of the embodiment of the present invention.
As shown in Figure 1, for the crankshaft group 100 of rotary compressor, comprise bent axle 1 and eccentric part 2 according to an embodiment of the invention.Wherein eccentric part 2 is set on bent axle 1 prejudicially, and for example eccentric part 2 can be set on the outer circumferential face of bent axle 1 prejudicially, and eccentric part 2 is cylindrical.Here, it should be noted that, eccentric part 2 is set in prejudicially and on bent axle 1, can be understood as the central axis of eccentric part 2 and the central axis of bent axle 1 is spaced apart, does not overlap.Wherein the piston of compressor (rotor) is suitable for being set on the outer circumferential face of eccentric part 2, and bent axle 1 drives eccentric part 2 to rotate, and eccentric part 2 and then drive piston rotation are compressed with the medium in the compression chamber of compressor.
As depicted in figs. 1 and 2, on the outer circumferential face of eccentric part 2, be formed with recess 21, the size that recess 21 made progress in the week of eccentric part 2 is less than the girth of eccentric part 2, that is to say, recess 21 is not around the outer circumferential face setting of whole eccentric part 2, and the central angle of recess 21 correspondences is less than 360 °.Because the outer circumferential face of eccentric part 2 is provided with recess 21, therefore can effectively reduce the area of contact of outer circumferential face and the piston inner peripheral surface of eccentric part 2, thereby effectively reduce the friction between the two, load and noise while reducing rotary compressor work, improved the efficiency of rotary compressor.
According to the crankshaft group 100 for rotary compressor of the embodiment of the present invention, by being provided with recess 21 on the outer circumferential face at eccentric part 2, thereby effectively reduced area of contact between eccentric part 2 and the piston of rotary compressor to reduce the friction between the two, load while having reduced rotary compressor work, and then the efficiency of rotary compressor is improved.
In preferred embodiments more of the present invention, the scope of the central angle β of recess 21 correspondences is: 0 ° < β≤180 °, in other words, the outer circumferential face of eccentric part 2 forms this recess 21 upwards only having at the most in week on half outer circumferential face.
Further, the initial position of recess 21 is for to be rotated counterclockwise the corresponding position of angle [alpha] from primary importance, wherein primary importance is that the central axis of the crossing Liang Ge position middle distance bent axle 1 of the outer circumferential face of the plane that limits of the central axis of eccentric part 2 and the central axis of bent axle 1 and eccentric part 2 is compared with Yuan Yige position, and 0 °≤α≤180 °, as shown in Figure 3-Figure 5.
In other words, as shown in Figure 3-Figure 5, suppose a plane, this plane is by the central axis of eccentric part 2 and the central axis of bent axle 1, the outer circumferential face of this plane and eccentric part 2 has two crossing positions, the central axis of one of them positional distance bent axle 1 is nearer, the central axis of another positional distance bent axle 1 is far the K place in Fig. 3-Fig. 5, this K place is primary importance, the initial position of recess 21 is just K in Fig. 3-Fig. 5 corresponding position of rotation angle α in the counterclockwise direction from this primary importance, the span of α is 0 °≤α≤180 °, for example, when α=0 °, the initial position of the first recess 21 is just at K place, when α=180 °, the initial position of the first recess 21 is relative with this K place diametrically.
In view of the span of α and β is respectively 0 ° < β≤180 °, 0 °≤α≤180 °, therefore the concrete formation position of recess 21 is in the part of the outer circumferential face of the eccentric part 2 of more close bent axle 1, due to this part and bent axle 1 nearer, therefore its pressure-bearing (for example slide plate applied pressure) is relatively little, thereby can not destroy effective supporting region for example keeps with the oil film of the part of the outer circumferential face of the distant eccentric part 2 of bent axle 1, avoid local pressure resistance operating temperature friction factor PV value excessive, and then effectively reduce the working load of rotary compressor.In brief, the formation location optimization of recess 21 is on the outer circumferential face of the eccentric part 2 near bent axle 1.
As shown in Figure 2, recess 21 eccentric part 2 axially on height be h, the height of eccentric part 2 is H, wherein 0.1≤h/H≤1.Preferably, h=H, that is to say, recess 21 connects eccentric part 2 in the axial direction, thereby reduces to greatest extent the area of contact of eccentric part 2 and piston, reduces the friction between the two.
Recess 21 bottom surface 211 can form various shape, for example recess 21 bottom surface 211 is straight line or curve in the axial direction Shang cross section that is orthogonal to eccentric part 2, certainly also can form the irregular lines of any shape, that is to say, the shape of 211 horizontal section, recess 21 bottom surface can be the irregular lines of straight line, curve or any shape.Here, it should be noted that, recess 21 bottom surface 211 refers in recess 21 opening direction Shang bottom surfaces 211, as shown in Figure 3-Figure 5.
As shown in Figure 4, in a preferred embodiment of the invention, recess 21 bottom surface 211 be circular arc and with the concyclic heart of outer circumferential face of eccentric part 2, that is to say, recess 21 bottom surface 211 forms one section of arc-shaped surface with the eccentric part 2 concyclic hearts.Further, in the preferred embodiment, as shown in Figure 4, the radius of curvature r of recess 21 bottom surface 211
1with the pass of the radius R of eccentric part 2 be: 0.2≤r
1/ R < 1.In this preferred embodiment, due to recess 21 bottom surface 211 and the concyclic heart of eccentric part 2, therefore very convenient in the process of actual recesses machined 21, for example can be integrally formed by casting, certainly also can carry out milling process formation to the presumptive area of eccentric part 2 outer circumferential faces, in other words, it is simple that the crankshaft group 100 of the preferred embodiment has technique, the advantage such as easy to process, quick, effectively reduces cost.
As shown in Figure 5, in another preferred embodiment of the present invention, recess 21 bottom surface 211 be arc-shaped surface and with the concyclic heart of outer circumferential face of bent axle 1, that is to say, recess 21 bottom surface 211 forms and the concyclic Xin of bent axle 1 one end arc-shaped surface.Further, in the preferred embodiment, as shown in Figure 5, the radius of curvature r of recess 21 bottom surface 211
2and the pass of the eccentric distance e between the radius R of eccentric part 2 and bent axle 1 and eccentric part 2 is: R-e≤r
2≤ R+e.In this preferred embodiment, due to recess 21 bottom surface 211 and the concyclic heart of bent axle 1, facilitated equally the processing of recess 21, for example can be integrally formed by casting, certainly also can carry out milling process formation to the presumptive area of eccentric part 2 outer circumferential faces, in other words, it is simple that the crankshaft group 100 of the preferred embodiment has technique equally, easy to process, advantage efficiently, thus effectively reduce cost.
In general, according to the crankshaft group 100 of the embodiment of the present invention, by recess 21 is set on the outer circumferential face at eccentric part 2, reduced the real contact area of eccentric part 2 and piston, guaranteed effective formation of carrying oil film, avoid local pressure resistance operating temperature friction factor PV value excessive, thereby reach the object that reduces friction, reduces compressor operating load.
According to the rotary compressor of the embodiment of the present invention, comprise according to the crankshaft group 100 for rotary compressor of describing in the above embodiment of the present invention.
According to other configuration example of the rotary compressor of the embodiment of the present invention as structures such as piston, slide plate, stock-solution pipes, be all prior art, and known by those skilled in the art, these parts can arrange according to existing mode completely, describe in detail no longer one by one here.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiments or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. for a crankshaft group for rotary compressor, it is characterized in that, comprising:
Bent axle (1); And
Eccentric part (2), described eccentric part (2) is set on described bent axle (1) prejudicially, on the outer circumferential face of described eccentric part (2), be formed with recess (21), described recess (21) is less than the girth of described eccentric part (2) in the size making progress in week of described eccentric part (2).
2. the crankshaft group for rotary compressor according to claim 1, is characterized in that, the scope of the central angle β that described recess (21) is corresponding is: 0 ° < β≤180 °.
3. the crankshaft group for rotary compressor according to claim 2, it is characterized in that, the initial position of described recess (21) is for to be rotated counterclockwise the corresponding position of angle [alpha] from primary importance, wherein said primary importance be the central axis of bent axle (1) described in the crossing Liang Ge position middle distance of the outer circumferential face of the plane that limits of the central axis of described eccentric part (2) and the central axis of described bent axle (1) and described eccentric part (2) compared with Yuan Yige position, and 0 °≤α≤180 °.
4. the crankshaft group for rotary compressor according to claim 1, is characterized in that, described recess (21) described eccentric part (2) axially on height be h, the height of described eccentric part (2) is H, wherein: 0.1≤h/H≤1.
5. the crankshaft group for rotary compressor according to claim 1, is characterized in that, the bottom surface of described recess (21) is straight line or curve in the axial direction Shang cross section that is orthogonal to described eccentric part (2).
6. the crankshaft group for rotary compressor according to claim 1, is characterized in that, the bottom surface (211) of described recess (21) be arc-shaped surface and with the concyclic heart of outer circumferential face of described eccentric part (2).
7. the crankshaft group for rotary compressor according to claim 6, is characterized in that, the radius of curvature r of the bottom surface (211) of described recess (21)
1with the pass of the radius R of described eccentric part (2) be: 0.2≤r
1/ R < 1.
8. the crankshaft group for rotary compressor according to claim 1, is characterized in that, the bottom surface (211) of described recess (21) be arc-shaped surface and with the concyclic heart of outer circumferential face of described bent axle (1).
9. the crankshaft group for rotary compressor according to claim 8, is characterized in that, the radius of curvature r of the bottom surface (211) of described recess (21)
2and the pass of the eccentric distance e between the radius R of described eccentric part (2) and described bent axle (1) and described eccentric part (2) is: R-e≤r
2≤ R+e.
10. a rotary compressor, is characterized in that, comprises according to the crankshaft group for rotary compressor described in any one in claim 1-9 (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480920.9A CN103511257A (en) | 2012-11-22 | 2012-11-22 | Rotary compressor and crank shaft assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480920.9A CN103511257A (en) | 2012-11-22 | 2012-11-22 | Rotary compressor and crank shaft assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103511257A true CN103511257A (en) | 2014-01-15 |
Family
ID=49894527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210480920.9A Pending CN103511257A (en) | 2012-11-22 | 2012-11-22 | Rotary compressor and crank shaft assembly thereof |
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| CN (1) | CN103511257A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819155A (en) * | 2015-05-08 | 2015-08-05 | 广东美芝制冷设备有限公司 | Crankshaft used for rotary type compressor, rotary type compressor and refrigerating cycle device |
| CN104879301A (en) * | 2015-06-11 | 2015-09-02 | 广东美芝制冷设备有限公司 | Crankshaft for rotary compressor and rotary compressor provided with crankshaft |
| WO2016197373A1 (en) * | 2015-06-11 | 2016-12-15 | 广东美芝制冷设备有限公司 | Crankshaft for rotary compressor and rotary compressor having same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819155A (en) * | 2015-05-08 | 2015-08-05 | 广东美芝制冷设备有限公司 | Crankshaft used for rotary type compressor, rotary type compressor and refrigerating cycle device |
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| CN104879301A (en) * | 2015-06-11 | 2015-09-02 | 广东美芝制冷设备有限公司 | Crankshaft for rotary compressor and rotary compressor provided with crankshaft |
| WO2016197373A1 (en) * | 2015-06-11 | 2016-12-15 | 广东美芝制冷设备有限公司 | Crankshaft for rotary compressor and rotary compressor having same |
| CN104879301B (en) * | 2015-06-11 | 2017-01-25 | 广东美芝制冷设备有限公司 | Crankshaft for rotary compressor and rotary compressor provided with crankshaft |
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| JP2017526863A (en) * | 2015-06-11 | 2017-09-14 | クワントン メイヂー コンプレッサー カンパニー リミテッド | Crankshaft for rotary compressor and rotary compressor provided with the same |
| US10260504B2 (en) | 2015-06-11 | 2019-04-16 | Guangdong Meizhi Compressor Co., Ltd. | Crankshaft for rotary compressor and rotary compressor having same |
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Application publication date: 20140115 |