CN202991492U - Rotary compressor and crankshaft assembly thereof - Google Patents
Rotary compressor and crankshaft assembly thereof Download PDFInfo
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- CN202991492U CN202991492U CN 201220624803 CN201220624803U CN202991492U CN 202991492 U CN202991492 U CN 202991492U CN 201220624803 CN201220624803 CN 201220624803 CN 201220624803 U CN201220624803 U CN 201220624803U CN 202991492 U CN202991492 U CN 202991492U
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- eccentric part
- rotary compressor
- recess
- crankshaft group
- utility
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Abstract
The utility model discloses a crankshaft assembly. The crankshaft assembly is suitable for a rotary compressor. The crankshaft assembly comprises a crankshaft and an eccentric part, wherein the eccentric part is eccentrically sleeved on the crankshaft. A concave part is formed on the outer circumference of the eccentric part, and the dimension of the concave part in the circumferential direction of the eccentric part is smaller than the perimeter of the eccentric part. By arranging the concave part on the outer circumference of the eccentric part, contact area between the eccentric part and a piston of the rotary compressor is effectively reduced so as to reduce friction between the eccentric part and the piston, a load of the rotary compressor in work is reduced, and energy efficiency of the rotary compressor is improved. The utility model further discloses the rotary compressor. The rotary compressor is provided with the crankshaft assembly.
Description
Technical field
The utility model relates to rotary compressor structure field, especially relates to a kind of crankshaft group for rotary compressor and has 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, thereby the frictional force between can increasing both because area of contact is large when eccentric part drives piston rotation causes the working load of compressor to raise.
The model utility content
The utility model is intended to solve at least one of technical problem that exists in prior art.
For this reason, a purpose of the present utility model 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 purpose of the present utility model is to propose a kind of rotary compressor.
The crankshaft group that is used for rotary compressor according to the utility model first aspect comprises: bent axle; And eccentric part, described eccentric part is set on described bent axle prejudicially, is formed with recess on the outer circumferential face of described eccentric part, and described recess is at the girth of the size that makes progress in the week of described eccentric part less than described eccentric part.
According to the crankshaft group for rotary compressor of the present utility model, by be provided with recess on the outer circumferential face of eccentric part, thereby effectively reduced area of contact between the piston of eccentric part and rotary compressor with the friction between reducing both, load when 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 utility model, can also have following additional technical feature:
In preferred embodiments more of the present utility model, the scope of the central angle β that described recess is corresponding is: 0 °＜β≤180 °.
In preferred embodiments more of the present utility model, the initial position of described recess is for being rotated counterclockwise angle [alpha] corresponding position from primary importance, wherein said primary importance is a central axis position far away of two described bent axles of position middle distance intersecting of the outer circumferential face of the plane that limits of the central axis of the central axis of described eccentric part and described bent axle and described eccentric part, and 0 °≤α≤180 °.
In preferred embodiments more of the present utility model, 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 utility model, the bottom surface of described recess is straight line or curve in the cross section that is orthogonal on the axial direction of described eccentric part.
In preferred embodiments more of the present utility model, the bottom surface of described recess be arc-shaped surface and with the concyclic heart of the 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 to the presumptive area of eccentric part outer circumferential face forms, 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 utility model, the bottom surface of described recess be arc-shaped surface and with the concyclic heart of the 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 to the presumptive area of eccentric part outer circumferential face forms, 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 the utility model second aspect, comprise the crankshaft group that is used for rotary compressor according to the above-mentioned first aspect of the utility model.
Additional aspect of the present utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming embodiment's description in conjunction with following accompanying drawing, wherein:
Fig. 1 is the stereogram according to an embodiment's of the utility model crankshaft group;
Fig. 2 is the plan view according to an embodiment's of the utility model crankshaft group;
Fig. 3-Fig. 5 is the sectional view according to three different embodiments' of the present utility model crankshaft group.
Description of reference numerals:
Crankshaft group 100;
Bent axle 1;
Primary importance K.
Embodiment
The below describes embodiment of the present utility model in detail, and described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explanation the utility model, and can not be interpreted as restriction of the present utility model.
in description of the present utility model, it will be appreciated that, term " " center ", " vertically ", " 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 utility model and simplified characterization for convenience of description, 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 restriction of the present utility model.
In addition, term " first ", " second " only are used for describing purpose, 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 present utility model, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is separately arranged.
In the utility model, unless clear and definite regulation and restriction are separately arranged, broad understanding should be done in the terms such as term " installation ", " being connected ", " connection ", " fixing ", 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 also to be electrically connected to; Can be directly to be 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 the concrete meaning of above-mentioned term in the utility model.
In the utility model, unless clear and definite regulation and restriction are separately arranged, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact 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 the 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 the First Characteristic level height is less than Second Characteristic.
Below with reference to the crankshaft group 100 that be used for rotary compressor of Fig. 1-Fig. 5 description according to the utility model embodiment.
As shown in Figure 1, the crankshaft group 100 that is used for rotary compressor according to an embodiment of the utility model comprises bent axle 1 and eccentric part 2.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, need to prove, it is spaced apart that eccentric part 2 is set in the central axis of the central axis that can be understood as eccentric part 2 on bent axle 1 and bent axle 1 prejudicially, namely do 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 and rotates, and eccentric part 2 and then drive piston rotation are to compress the medium in the compression chamber of compressor.
As depicted in figs. 1 and 2, be formed with recess 21 on the outer circumferential face of eccentric part 2, recess 21 that is to say at the girth of the size that makes progress in the week of eccentric part 2 less than eccentric part 2, recess 21 is not the outer circumferential face setting around whole eccentric part 2, and namely 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 the friction between effectively reducing both, load and noise when reducing rotary compressor work have improved the efficiency of rotary compressor.
The crankshaft group 100 that is used for rotary compressor according to the utility model embodiment, by be provided with recess 21 on the outer circumferential face of eccentric part 2, thereby effectively reduced area of contact between the piston of eccentric part 2 and rotary compressor with the friction between reducing both, load when having reduced rotary compressor work, and then the efficiency of rotary compressor is improved.
In preferred embodiments more of the present utility model, 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 is upwards only having this recess 21 of formation on half outer circumferential face week at the most.
Further, the initial position of recess 21 is for being rotated counterclockwise angle [alpha] corresponding position from primary importance, wherein primary importance is a central axis position far away of two position middle distance bent axles 1 intersecting of the outer circumferential face of the plane that limits of the central axis of the central axis of eccentric part 2 and bent axle 1 and eccentric part 2, 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 the K corresponding position of rotation angle α in the counterclockwise direction in Fig. 3-Fig. 5 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 the 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, so its pressure-bearing (for example slide plate applied pressure) less, 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 of close 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, the friction between reduction both.
The bottom surface 211 of recess 21 can form various shape, for example the bottom surface 211 of recess 21 is straight line or curve in the cross section that is orthogonal on the axial direction of eccentric part 2, certainly also can form the irregular lines of any shape, that is to say, the shape of the horizontal section of the bottom surface 211 of recess 21 can be the irregular lines of straight line, curve or any shape.Here, need to prove, the bottom surface 211 of recess 21 refers to the bottom surface 211 on recess 21 opening directions, as shown in Figure 3-Figure 5.
As shown in Figure 4, in a preferred embodiment of the present utility model, the bottom surface 211 of recess 21 be circular arc and with the concyclic heart of the outer circumferential face of eccentric part 2, that is to say, the bottom surface 211 of recess 21 forms one section 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 the bottom surface 211 of recess 21
1With the pass of the radius R of eccentric part 2 be: 0.2≤r
1/ R＜1.In this preferred embodiment, bottom surface 211 and the concyclic heart of eccentric part 2 due to recess 21, 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 to the presumptive area of eccentric part 2 outer circumferential faces and form, 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 utility model, the bottom surface 211 of recess 21 be arc-shaped surface and with the concyclic heart of the outer circumferential face of bent axle 1, that is to say, the bottom surface 211 of recess 21 forms the end arc-shaped surface with the bent axle 1 concyclic heart.Further, in the preferred embodiment, as shown in Figure 5, the radius of curvature r of the bottom surface 211 of recess 21
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, bottom surface 211 and the concyclic heart of bent axle 1 due to recess 21, facilitated equally the processing of recess 21, for example can be integrally formed by casting, certainly also can carry out milling process to the presumptive area of eccentric part 2 outer circumferential faces and form, 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, crankshaft group 100 according to the utility model embodiment, by recess 21 is set on the outer circumferential face of 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 purpose that reduces to rub, reduce the compressor operating load.
According to the utility model embodiment's rotary compressor, comprise according to the crankshaft group 100 that is used for rotary compressor of describing in the utility model above-described embodiment.
According to structures such as other configuration example of the utility model embodiment's rotary compressor such as piston, slide plate, stock-solution pipes, be all prior art, and known by those skilled in the art, namely these parts can arrange according to existing mode fully, 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 utility model or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiments or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present utility model and aim can be carried out multiple variation, modification, replacement and modification to these embodiments, scope of the present utility model is limited by claim and equivalent thereof.
Claims (10)
1. a crankshaft group that is used for rotary compressor, is characterized in that, comprising:
Bent axle (1); And
Eccentric part (2), described eccentric part (2) is set on described bent axle (1) prejudicially, be formed with recess (21) on the outer circumferential face of described eccentric part (2), described recess (21) is at the size that makes progress in week of described eccentric part (2) girth less than 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 being rotated counterclockwise angle [alpha] corresponding position from primary importance, wherein said primary importance is a central axis position far away of two described bent axles of position middle distance (1) of intersecting of the outer circumferential face of the plane that limits of the central axis of the central axis of described eccentric part (2) and described bent axle (1) and described eccentric part (2), 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 cross section of the bottom surface of described recess (21) on the axial direction that is orthogonal to described eccentric part (2) is straight line or curve.
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 the described crankshaft group for rotary compressor of any one (100) according to claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624803 CN202991492U (en) | 2012-11-22 | 2012-11-22 | Rotary compressor and crankshaft assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624803 CN202991492U (en) | 2012-11-22 | 2012-11-22 | Rotary compressor and crankshaft assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202991492U true CN202991492U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220624803 Expired - Lifetime CN202991492U (en) | 2012-11-22 | 2012-11-22 | Rotary compressor and crankshaft assembly thereof |
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| Country | Link |
|---|---|
| CN (1) | CN202991492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511257A (en) * | 2012-11-22 | 2014-01-15 | 广东美芝制冷设备有限公司 | Rotary compressor and crank shaft assembly thereof |
-
2012
- 2012-11-22 CN CN 201220624803 patent/CN202991492U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511257A (en) * | 2012-11-22 | 2014-01-15 | 广东美芝制冷设备有限公司 | Rotary compressor and crank shaft assembly thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
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| CX01 | Expiry of patent term |