CN105604915A - Piston, compressor provided with same and machining method of piston - Google Patents
Piston, compressor provided with same and machining method of piston Download PDFInfo
- Publication number
- CN105604915A CN105604915A CN201610094730.1A CN201610094730A CN105604915A CN 105604915 A CN105604915 A CN 105604915A CN 201610094730 A CN201610094730 A CN 201610094730A CN 105604915 A CN105604915 A CN 105604915A
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- Prior art keywords
- piston
- groove section
- groove
- axis
- median plane
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention discloses a piston. The piston comprises a piston body, wherein grooves are formed in the peripheral faces of the piston body. Each groove includes a first groove section and a second groove section, wherein the first groove section is located in one side of a first central plane of the piston body, the second groove section is located in the other side of the first central plane, and the area of the second groove section is larger than the area of the first groove section; the first central plane is a plane of axes passing through the piston body. Since the grooves in the peripheral faces on the two sides of the piston body are different in area, a difference value exists between air force generated by air pressure in the grooves in the two sides; the difference value can be used for offsetting lateral component force of external force borne by the piston, so that lateral friction force of the piston is reduced, and reliability of the piston is improved. The invention also discloses a compressor and a machining method of the piston.
Description
Technical field
The present invention relates to piston compressor technical field, be specifically related to a kind of piston. The invention still further relates toThere is the processing method of compressor and the piston of this piston.
Background technology
The cassette mechanism structure of common piston compressor (for example refrigerator piston compressor) is as Fig. 1 and 2 instituteShow. Compressor moving component is mainly by 4 groups of frames 1, piston 3, piston pin 2, bent axle 5, connecting rodBecome, its schematic diagram of mechanism as shown in Figure 3. In the course of the work, piston 3 is at the thrust F of connecting rod 4Connecting rodEffect lower compression air work. The thrust F that piston is subject toConnecting rodCan be decomposed into the power F of Compressed GasGasWith cross component force FSide direction, and the reaction force F ' that bent axle is subject toConnecting rodCan be decomposed into rotary resistance FTorqueWith restraining force FConstraint. Wherein, FSide directionExistence cause a side and the cylinder wall of piston to rub. WithTime, at FSide directionEffect under, piston can depart from center, thereby the leakage difference of piston both sides,Cause piston both sides gas pressure difference and cause additional side force, make the suffered total side direction of pistonPower further strengthens.
For this reason, in prior art, conventionally between piston center and crankshaft rotating center, be provided with offsetE, to reduce cross component force FSide directionSize, but effect is very limited. In addition, in prior art, also existThe outer peripheral face of piston only is offered groove, for example as shown in Figure 4 one circle constant width groove, withPlay the effect of counterpressure, can reduce the contact area of piston and casing wall simultaneously, reduce thusFriction, but the suffered side force of piston is still larger. Therefore, the piston structure of prior art has hinderedThe further raising of compressor performance.
Summary of the invention
In view of the above-mentioned present situation of prior art, main purpose of the present invention is to provide a kind of piston, itsCan reduce the side-friction force of piston, improve the reliability of piston.
Above-mentioned purpose is achieved through the following technical solutions:
A kind of piston, it comprises piston only, wherein, the outer peripheral face of described piston only is provided with recessedGroove, described groove comprises the first groove section and the second groove section, wherein, described the first groove section is positioned at piston originallyOne side of the first median plane of body, described the second groove section is positioned at the opposite side of described the first median plane, andAnd the area of described the second groove section is greater than the area of described the first groove section; Wherein, described the first centerFace is the face through the axis of described piston only.
Preferably, described piston only is provided with the pin-and-hole for being connected with connecting rod, and described firstMedian plane is through the axis of described pin-and-hole.
Preferably, described the second groove section is about the second median plane symmetry of described piston only, wherein,Described the second median plane is through the axis of described piston only vertical with described the first median planeFace.
Preferably, the width of at least a portion of described the second groove section is greater than the width of described the first groove section.
Preferably, described the second groove section comprises the Part I coaxial with described piston only and with describedPiston only out-of-alignment Part II.
Preferably, described the first groove section is coaxial with the Part I of described the second groove section.
Preferably, between the axis of the Part II of described the second groove section and the axis of described piston onlyDistance equal the degree of depth of described the first groove section.
Preferably, described the second groove section is coaxial with described the first groove section.
Preferably, the two ends of described the second groove section are positioned at described the first median plane place, and described the second grooveThe width of section equates everywhere.
Preferably, described piston only is metallic sintered products or die casting part.
Another object of the present invention is to provide a kind of compressor, it comprises foregoing piston.
Another object again of the present invention is to provide the processing method of foregoing piston, and it comprises stepRapid:
Make the axis rotation of piston only around self, on piston only turning process the first groove section andA part for the second groove section;
Process the remainder of the second groove section.
Preferably, in the time that described the second groove section comprises out-of-alignment Part I and Part II, secondThe procedure of processing of the described remainder of groove section comprises:
The pivot that makes piston only is from the axis of self towards described the first groove field offset, and turning addsWork goes out described remainder;
When described the second groove section is with described the first groove section when coaxial, the described remainder of the second groove sectionProcedure of processing comprises:
Make piston only around self axis rotation, Milling Process goes out described remainder.
Piston of the present invention is due to the groove area difference being arranged on the outer peripheral face of piston only both sides,The gas force difference that gas pressure in grooves on two sides is produced, the difference of the gas force of both sides canCross component force or its part of the external force being subject to for counteracting piston self, thus work can be reducedThe side-friction force of plug, improves the reliability of piston. Especially, in preferred version of the present invention, liveGroove on plug body comprises out-of-alignment part, can add for twice through traditional turning and eccentric turningWork goes out.
Brief description of the drawings
Hereinafter with reference to accompanying drawing to piston according to the present invention, compressor and piston processing method preferablyEmbodiment is described. In figure:
Fig. 1 is the schematic top plan view of the piston compressor cassette mechanism structure of prior art;
Fig. 2 is the cross-sectional schematic of the cassette mechanism structure of Fig. 1;
Fig. 3 is the schematic diagram of mechanism of piston compressor;
Fig. 4 is that the master of the piston only of prior art looks schematic diagram;
Fig. 5 is that the master of the piston only of a kind of preferred embodiment of the present invention looks schematic diagram;
Fig. 6 is the schematic three dimensional views of the piston only of Fig. 5;
Fig. 7 is the stressing conditions schematic diagram of the piston only of Fig. 5;
Fig. 8 is that the master of the piston only of another kind of preferred embodiment of the present invention looks schematic diagram;
Fig. 9 is the schematic three dimensional views of the piston only of Fig. 8;
Figure 10 is traditional turning schematic diagram;
Figure 11 is eccentric turning schematic diagram.
Detailed description of the invention
The aforementioned present situation that the present invention is directed to prior art, provides a kind of piston, and it comprises piston only 6,Referring to Fig. 5-9, the outer peripheral face of described piston only 6 is provided with groove, and described groove comprises the first groove section8 and the second groove section 9. Wherein, described the first groove section 8 is positioned at a side of the first median plane of piston only,Described the second groove section 9 is positioned at the opposite side of described the first median plane. Especially, described the second groove section 9Area be greater than the area of described the first groove section 8. At this, the area of groove section can refer to notch outsideThe area that edge defines on the outer peripheral face of piston only, also can refer to that notch is on the first median planeProjected area. In the present invention, described the first median plane is the face through the axis of described piston only 6.
Also, the groove on piston only outer peripheral face of the present invention is asymmetric about the first median planeGroove, this is the primary difference of the piston of the present invention and prior art.
Because the area of the first groove section is different from the area of the second groove section, and in the time of pistons work two groovesGas pressure (finger pressure is strong here) in section is identical, the gas of groove section one side that therefore area is largeThe gas force that body produces is also large, as shown in Figure 7, F2 > F1, so, by piston is correctly installed,Can make the difference F2-F1 of the gas force of both sides offset at least in part the suffered external force of piston (for example connectsBar thrust FConnecting rod) cross component force FSide directionThereby, contribute to reduce the friction between piston and cylinder wallPower. Particularly, when installation, a side of the second groove section can be placed on to piston and cylinder wall is more approachingA side, bear side force FSide directionA side, thereby can make F2 and FSide directionOpposite direction.
Conventionally, described piston only 6 is provided with the pin-and-hole 7 for being connected with connecting rod, in this feelingsUnder condition, aforesaid the first median plane also passes through the axis of described pin-and-hole 7. For example,, at Fig. 5 and Fig. 8In, the first median plane overlaps with illustrated center line. Therefore, on the piston only with pin-and-hole, establishWhile putting aforesaid groove, can define easily the first groove section and the second groove section taking pin-and-hole as benchmark.Meanwhile, be also very easy to when mounted a side of the second groove section is placed on to piston and cylinder wall is more approachingA side.
Preferably, the first groove section 8 communicates with the second groove section 9, and particularly the two can 360 degreeAround the outer peripheral face of piston only, form the groove of a whole circle. Preferably, the two can be at pin-and-hole 7Position converge, also, groove can be through the two ends of pin-and-hole 7.
Preferably, described the second groove section 9 is about the second median plane symmetry of described piston only 6, itsIn, described the second median plane is through the axis of described piston only vertical with described the first median planeFace, for example, in Fig. 5 and Fig. 8, the second median plane overlaps with paper. Due to piston only 6Outer peripheral face be for example the face of cylinder, the direction of the second groove section gas force is everywhere not identical, when secondGroove section is about the second median plane when symmetrical, and the resultant direction of the second groove section gas force is everywhere perpendicular to theOne median plane, also perpendicular to pin-and-hole axis, thus and FSide directionDirection is just the opposite, thereby only playsOffset FSide directionEffect, and can not make piston produce the skew of other direction.
Preferably, the width of at least a portion of described the second groove section 9 is greater than described the first groove section 8Width. In the present invention, the width of groove section refers to the size of groove section in piston axis direction. For example,As shown in Figure 5, the width of the first groove section is h, and the width of the second groove section is H, wherein, H > h. OrAs shown in Figure 8, the second groove section only width of a part is greater than the width of the first groove section to person.
No matter whether the first groove section and the second groove section communicate, and whether around the whole circle of piston only one,By the difference of groove section width is set, all easily realize the difference of groove section area. And the first groove section withIn the situation that the second groove section communicates, particularly the two in the situation of piston only one whole circle, secondGroove section, as long as the width of some is greater than the width of the first groove section, can realize the difference of area. ExcellentSelection of land, the constant width of the first groove section, the second groove section also can some width and the first groove sectionWidth is identical.
Obviously, it is more that H is greater than h, more favourablely reduces aforesaid cross component force FSide direction, but adopt largerThe prerequisite of H be the contact area that must ensure piston and cylinder wall, seal and contact stress ensureing.For example, in the time that piston length is 18～22mm, generally, h can be 2～4mm, and H canThink 5～10mm.
Preferably, as shown in Fig. 5-7, described the second groove section 9 comprises with described piston only 6 coaxialPart I 10 and with described piston only 6 out-of-alignment Part II 11. Also, the second groove sectionCan comprise out-of-alignment two parts, especially, Part II 11 be than the first groove section wide go outPart. At this, groove section and piston only coaxially whether, refer to the post at the bottom land place of groove sectionWhether face is coaxial with the outer peripheral face of piston only.
Due to Part II and the Part I disalignment of the second groove section, Part I with piston thisBody is coaxial, thereby to make the degree of depth of Part II be gradual change, for example, preferably increase to and first from 0Partial depth equates. Like this, Part II can adopt the mode of eccentric turning to process, and specifically willBe described in the back.
Preferably, described the first groove section 8 can be coaxial with the Part I of described the second groove section 9 10.Like this, specifically adding man-hour, for example, can once the first groove section 8 and described Part I 10 processedGo out, for example, by traditional turning mode.
Two vertical center lines have been shown in Fig. 5, and wherein, longer center line is piston only,The axis of the Part I of one groove section, the second groove section, shorter center line is the second groove section secondThe axis of part.
Preferably, the Part II 11 of described the second groove section 9 with described piston only 6 (is also simultaneouslyAnd Part I or the first groove section) between eccentric throw (being also the distance between axis) equal described inThe degree of depth (being preferably also the degree of depth of the second groove section Part I) of the first groove section.
Especially, in the time that this eccentric throw equals the degree of depth of the first groove section, the Part I of the second groove sectionBottom radius can equal the radius of piston only, now, if the depth capacity of Part II equalsThe degree of depth (being preferably also the degree of depth of the second groove section Part I) of the first groove section, the two ends of Part IIRoughly be positioned at the position of the first median plane. Also, the length that can realize the second groove section is the longest, andWidth equates everywhere, the farthest area discrepancy of realization and the first groove section, thus piston is reducedThe characteristic of side-friction force reaches maximization.
In addition, in the time that this eccentric throw is not equal to the degree of depth of the first groove section, according to two of the second groove section portionsThe size of the eccentric throw between point, by suitable bottom radius is set for Part II, also can makeThe two ends of the Part II of the second groove section are roughly positioned at the position of the first median plane, make described secondThe length of groove section is the longest, and width equates everywhere. Just, in this case, the maximum of Part IIThe degree of depth of the degree of depth and described Part I (or first groove section) may be unequal, and, Part IIThe calculating meeting of bottom radius relatively bother.
Alternatively, described the second groove section also can be coaxial with described the first groove section on the whole. Also,Two groove sections wide go out part also coaxial with the first groove section, thereby the bottom radius of the second groove section phase everywhereDeng, also, the degree of depth also equates everywhere, is equal to the degree of depth of the first groove section, for example, and as Fig. 8 and 9Shown in. Compared with comprising two parts of out-of-alignment with the second groove section in last embodiment, this enforcement sideThe second groove section in formula will bother adding man-hour, for example cannot on a chassis bed, complete, butNeed to first complete the turning of a part for the first groove section and the second groove section with lathe, and then with for exampleMilling machine come milling the second groove section than the first groove section wide go out part. In present embodiment, the second groove sectionWide go out part also can extend to the position of the first median plane, also, the width place of the second groove sectionPlace equates, and length reaches the longest.
Preferably, piston only of the present invention can be also metallic sintered products or die casting part. Also,Because the outer peripheral face of piston only is provided with the different groove of area (asymmetric on the whole), thereby canAdopt the mode of powder metallurgy or die casting that groove is produced once.
Alternatively, the groove on piston only of the present invention also can adopt mach mode to addWork. Preferably, the processing method of this piston only can comprise step:
(1) make the axis rotation of piston only around self, on piston only, turning processes the first grooveA part for section and the second groove section. Turning process can adopt the traditional turning shown in Figure 10, that is, liveThe rotation of plug body, the dead in line of its pivot and piston only, lathe tool 12 does feeding and completes carCut.
(2) process the remainder of the second groove section.
Particularly point out, above-mentioned two steps can be carried out with random order. Also, both can be firstProcess a part for the first groove section and the second groove section and then the remainder of processing the second groove section (Than the first groove section wide go out part), also can first process the second groove section wide go out part, thenReprocess the appropriate section of the first groove section and the second groove section.
Preferably, in the time that described the second groove section comprises out-of-alignment Part I and Part II, secondThe procedure of processing of the described remainder of groove section comprises:
The pivot that makes piston only is from the axis of self towards described the first groove field offset, and turning addsWork goes out described remainder. The pivot, can make turning time and the axis of piston only are not yetOverlap, i.e. (wherein longer center line is pivot, shorter in eccentric turning as shown in figure 11Center line is the axis of piston only), and make pivot be partial to a side of the first groove section, lathe tool 12Do feeding and complete turning. What preferably, should make that the axis of this pivot and piston only forms is flatFace is vertical with pin-and-hole axis, with poor (F2-F1) that ensure the gas force that two groove sections of groove produce withThe cross component force F of connecting rod thrustSide directionIn same plane and opposite direction, thereby reach in concrete useTime offset FSide directionThe object of at least a portion.
In the time adopting said method machined grooves, owing to adopting eccentric turning mode, be easy to realize and liveFill in the difference of two side channel section areas, and two side channel sections are communicated with, internal pressure (finger pressure is strong here) is phaseWith, the pressure of the side γ-ray emission that therefore groove section area is large (product of the strong and area of finger pressure here)Also large.
Alternatively, when described the second groove section and described the first groove section coaxial (the second groove section wide go out portionDivide also coaxial with the first groove section) time, the procedure of processing of the described remainder of the second groove section comprises:
Make piston only around self axis rotation, Milling Process goes out described remainder.
Piston of the present invention in use, is placed on piston by a side large groove section area and cylinder more connectsA near side (for example, due to the effect of connecting rod thrust), the gas that the side that groove section area is large producesMuscle power is greater than the gas force that a side that groove section area is little produces, thereby can offset or partial offset connecting rod pushes awayThe cross component force of power, reduces the frictional force between piston and cylinder wall, improves piston reliability.
It should be noted that, piston of the present invention in use, its inside grooves volume can not with compressionThe inner low-pressure side of machine is communicated with, otherwise cannot realize aforementioned every beneficial effect.
Another aspect of the present invention provides a kind of compressor, and it comprises foregoing piston. ThisBright compressor is for example refrigerator piston compressor. Because piston of the present invention can be offset part connecting rodThe cross component force of thrust, thereby frictional force (being side-friction force) between piston and cylinder wall reduces,The reliability of piston is improved, and the performance of compressor is improved.
Those skilled in the art will readily understand, under the prerequisite of not conflicting, above-mentioned measuresCan freely combine, superpose.
Should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, not inclined to one sideIn the situation of general principle of the present invention, those skilled in the art can do for above-mentioned detailsGo out various significantly or the amendment or the replacement that are equal to, all will be contained in claim model of the present inventionIn enclosing.
Claims (13)
1. a piston, it comprises piston only, it is characterized in that the outer peripheral face of described piston onlyBe provided with groove, described groove comprises the first groove section and the second groove section, wherein, and described the first groove sectionIn a side of the first median plane of piston only, described the second groove section is positioned at the another of described the first median planeOne side, and the area of described the second groove section is greater than the area of described the first groove section; Wherein, described inThe first median plane is the face through the axis of described piston only.
2. piston according to claim 1, is characterized in that, described piston only is provided with useIn the pin-and-hole being connected with connecting rod, described the first median plane is through the axis of described pin-and-hole.
3. piston according to claim 1 and 2, is characterized in that, described the second groove section aboutThe second median plane symmetry of described piston only, wherein, described the second median plane is the described piston of processThe axis of body the face vertical with described the first median plane.
4. according to the piston one of claim 1-3 Suo Shu, it is characterized in that, described the second groove sectionThe width of at least a portion is greater than the width of described the first groove section.
5. according to the piston one of claim 1-4 Suo Shu, it is characterized in that described the second groove section bagDraw together the Part I coaxial with described piston only and with described piston only out-of-alignment Part II.
6. piston according to claim 5, is characterized in that, described the first groove section and describedThe Part I of two groove sections is coaxial.
7. according to the piston described in claim 5 or 6, it is characterized in that of described the second groove sectionDistance between the axis of two parts and the axis of described piston only equals the dark of described the first groove sectionDegree.
8. according to the piston one of claim 1-4 Suo Shu, it is characterized in that, described the second groove section withDescribed the first groove section is coaxial.
9. according to the piston one of claim 1-8 Suo Shu, it is characterized in that, described the second groove sectionTwo ends are positioned at described the first median plane place, and the width of described the second groove section equates everywhere.
10. according to the piston one of claim 1-9 Suo Shu, it is characterized in that described piston onlyFor metallic sintered products or die casting part.
11. 1 kinds of compressors, is characterized in that, comprise according to the work one of claim 1-10 Suo ShuPlug.
12. according to the processing method of the piston one of claim 1-9 Suo Shu, it is characterized in that bagDraw together step:
Make the axis rotation of piston only around self, on piston only turning process the first groove section andA part for the second groove section;
Process the remainder of the second groove section.
13. processing methods according to claim 12, is characterized in that,
In the time that described the second groove section comprises out-of-alignment Part I and Part II, the institute of the second groove sectionThe procedure of processing of stating remainder comprises:
The pivot that makes piston only is from the axis of self towards described the first groove field offset, and turning addsWork goes out described remainder;
When described the second groove section is with described the first groove section when coaxial, the described remainder of the second groove sectionProcedure of processing comprises:
Make piston only around self axis rotation, Milling Process goes out described remainder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610094730.1A CN105604915B (en) | 2016-02-19 | 2016-02-19 | A kind of processing method of piston, the compressor with it and piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610094730.1A CN105604915B (en) | 2016-02-19 | 2016-02-19 | A kind of processing method of piston, the compressor with it and piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105604915A true CN105604915A (en) | 2016-05-25 |
| CN105604915B CN105604915B (en) | 2017-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610094730.1A Active CN105604915B (en) | 2016-02-19 | 2016-02-19 | A kind of processing method of piston, the compressor with it and piston |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467820A (en) * | 1977-11-09 | 1979-05-31 | Isuzu Motors Ltd | Internal combustion engine piston |
| KR20010066428A (en) * | 1999-12-31 | 2001-07-11 | 이계안 | Piston pin for engine |
| CN201047314Y (en) * | 2007-05-14 | 2008-04-16 | 郑庆凤 | Four strokes piston |
| JP2011226406A (en) * | 2010-04-21 | 2011-11-10 | Hitachi Koki Co Ltd | Air compressor |
| CN204738928U (en) * | 2015-05-11 | 2015-11-04 | 浙江阿斯贝拉制冷科技有限公司 | Compressor piston structure |
| CN205370909U (en) * | 2016-02-19 | 2016-07-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Piston and have its compressor |
-
2016
- 2016-02-19 CN CN201610094730.1A patent/CN105604915B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5467820A (en) * | 1977-11-09 | 1979-05-31 | Isuzu Motors Ltd | Internal combustion engine piston |
| KR20010066428A (en) * | 1999-12-31 | 2001-07-11 | 이계안 | Piston pin for engine |
| CN201047314Y (en) * | 2007-05-14 | 2008-04-16 | 郑庆凤 | Four strokes piston |
| JP2011226406A (en) * | 2010-04-21 | 2011-11-10 | Hitachi Koki Co Ltd | Air compressor |
| CN204738928U (en) * | 2015-05-11 | 2015-11-04 | 浙江阿斯贝拉制冷科技有限公司 | Compressor piston structure |
| CN205370909U (en) * | 2016-02-19 | 2016-07-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Piston and have its compressor |
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| Publication number | Publication date |
|---|---|
| CN105604915B (en) | 2017-10-31 |
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